The method of controlling the laser resonator and the device based on it

 

The invention relates to a managed laser technology and can be used to build managed laser resonators of various types, including those with controlled output power, receive continuous laser pulse-periodic modulation mode in a wide range and with different amplitude and to increase the power output and peak intensity of different lasers. Two or more mirrors of the laser resonator replace deformable mirrors. The shape of the reflective surface of each mirror is controlled by electric, magnetic, mechanical or hydraulic impacts generated by the control unit, which match with the computer, a generator of electrical signals or single-channel or multi-channel sensor/receiver. Control actions of the at least two deformable mirrors of the laser resonator is formed as a sequence of pulses that are synchronized relative to each other with a constant or variable phase shift. Ensured the expansion of the range of materials in laser material processing systems, improving the quality and performance of laser processing. Ice and can be used to build managed lasers of various types, including with controlled output power of the radiation, and also to manage them in real time. In addition, the present invention can be used to obtain a continuous laser pulse-periodic mode of generation in a wide frequency range and with different amplitude, as well as to increase the power output and peak intensity of different lasers.

Known system intracavity control (see Vorontsov, M. A., Schmalhausen Century. And. Principles of adaptive optics. - M.: Nauka, 1985, S. 99-100, 107-110) that contains multichannel adaptive mirror, placed in the laser resonator instead of turning mirrors or optional; the number of control channels deformable mirror 9, 16, or 18. In addition, this system contains photodetectors, aperture, focusing lens, beam splitter, amplifiers, synchronous detectors, generators, scan, mixers and analog dividers. This system is designed to compensate in real time intracavity distortion of the laser radiation (tilt of a wavefront defocus, astigmatism, etc.,) and operates according to the method (way) of the aperture sensing, according to which multi-channel adapter is seeking a certain fraction of the output radiation of the laser. In each channel deformable mirror consists of two electrical signal: managing and modulating. Modulating the signals of all channels are different and are formed by the generators of the scan. The signal of the photodetector after pre-amplification detects synchronous detectors, each of which is controlled by the corresponding scan generator.

Synchronously proyektirovanii signal in each channel after amplification and mixing with the corresponding modulating signal serves on the corresponding channel deformable mirror. Under the influence of electrical signals changing profile of the reflective surface of the deformable mirror and thereby is compensated intracavity distortion of the laser radiation. It should be noted that in this system intracavity control of distortion in the resonator are made artificially, using more of a deformable mirror that is installed inside the resonator instead of turning mirrors or later.

The disadvantages of this method and device are: 1) small control range output power of the laser radiation (maximum of 60% of nominal power) and, as a consequence, the impossibility Abote system in an automatic closed-loop mode, which leads to a slight modulation of the output radiation; 3) high complexity, due to the presence of several (the number of control channels) generators, synchronous detectors and mixers.

Closest to the proposed method and device are a method and apparatus for power control of the output radiation odnokratnogo CO2laser, see Brown, S. A. and others "feasibility Study of power generation technology CO2laser intracavity adaptive mirror." - Quantum. Electron., 1989, T. 16, No. 9, S. 1839-1840. This method consists in the fact that the deaf (end) mirror of the laser resonator replaced cooled managed corrector (deformable mirror) on the basis of semi-passive bimorph piezoelectric element; a reflective surface shape deformable mirror control voltage, which is formed by an electronic control unit. In the static mode control was obtained changing the output power of the laser radiation to a maximum of 33% of its nominal power (750 watts), while the control voltage to the deformable mirror was changed to the maximum possible range (from -300 V to +300 V). In dynamic mode, the PLA received modulation output power of laser radiation, the maximum modulation depth was achieved at the resonant frequency of the deformable mirror (3,8 kHz and 7.6 kHz) and was 50-75%. Device to control the output radiation power odnokratnogo CO2laser contains a deformable mirror, coupled with electronic control unit.

The disadvantages of this method and device are: 1) small control range output power of laser radiation in static mode and, as a consequence, the impossibility of complete locking of the resonator (clearing generated); 2) shallow depth of modulation of the output power of laser radiation in the dynamic mode, even at the resonant frequency of the deformable mirror, and, as a consequence, the impossibility of obtaining a pulse-periodic mode of generation, in General, at low frequencies of operation of a deformable mirror, in particular; 3) inability to obtain pulses of laser radiation with an amplitude greater than the average power of the laser in continuous mode.

The technical result from the use of the invention is to increase the control range output power of laser radiation, including, on the one hand, the full repayment of generation and, on the other hand, cha is aluchemie pulse-periodic mode of generation in a continuous laser, including the receipt of pulses of laser radiation with an amplitude greater than the average power of the laser in continuous mode.

This technical result is achieved due to the fact that in the process control of the laser resonator, which as its mirror using a deformable mirror, the reflective surface shape of which is controlled by means of an electrical signal generated by the electronic control unit, as at least one mirror of the laser using a deformable mirror or as all the mirrors of the laser using a deformable mirror, the reflective surface shape of each of the deformable mirror is controlled by means of an electrical effects generated by the control unit, which match with your computer or/and with a generator of electrical signals, or/and with single-channel or multi-channel sensor/receiver, the curvature radius of the source optical surfaces, at least one of a deformable mirror or all of deformable mirrors RDish.i, 1iN, where N is the number of deformable mirrors in the laser, choose from the relation

ex.i=1010mm (when i-e deformable mirror is mounted in the laser resonator optional),hthe HAC.i- deformation (change of arrow deflection) of the i-th deformable mirror when it is vacuum-tightly rolled back in the laser resonator. In addition, when implementing the method of controlling a laser resonator control actions, at least two deformable mirrors, or all of deformable mirrors of the laser resonator can be formed in the form of sequences of pulses that are synchronized relative to each other with a constant or variable phase shift.

When implementing the control method of the laser resonator increase the control range output power of the laser radiation is due to the fact that at least one mirror of the laser using a deformable mirror or as all the mirrors of the laser using a deformable mirror, the reflective surface shape of each of the deformable mirror is controlled by means of an electrical effects generated by the control unit, which match with your computer or/and with single-channel or multi-channel sensor/receiver. De rearview mirror resonator, instead of which is mounted a deformable mirror. Then, in the absence of control action I on the deformable mirror output power of the laser corresponds to the nominal. Change control action (prototype - electric voltage) on the deformable mirror (prototype - piezoelectric) leads to a change of curvature of the reflective surface. This, in turn, leads to a change in the optical configuration of the laser resonator and, hence, to increased losses in the resonator (at the optimum source resonator configuration). In the power output of the laser falls (prototype - 33%). Replacement of one or more mirrors of the resonator deformable mirrors and management of curvature of the reflective surface using control actions leads to the fact that the optical configuration of the resonator varies more significantly (each deformable mirror contributes to this process). Consequently, the loss in the resonator in the management of mirrors will be more, which leads to increased control range output power of the radiation in comparison with the prototype. At the same time as mirrors with controlled curvature reflecting on tricesimo, magnetic, mechanical, hydraulic, and so on), which are formed by respective control units on the computer beep or/and single-channel (multi-channel) sensor. T. O., achieved the specified technical result. In the case where the deformable mirror is installed in the laser advanced (for example, at the stage of development), increasing the control range output power of the laser radiation (i.e., the technical result is achieved in a similar way. Relevant distinguishing feature in these cases is that as the at least one mirror of the laser using a deformable mirror or as all the mirrors of the laser using a deformable mirror, the reflective surface shape of each of the deformable mirror is controlled by means of an electrical effects generated by the control unit, which match with your computer or/and with single-channel or multi-channel sensor/receiver.

Full damping of the generation of radiation in the process control of the laser resonator and a partial increase of the nominal output power of the laser is also achieved due to the fact that at least one of the mirror lazarou reflective surface of each of the deformable mirror is controlled by means of an electrical influences, generated by the control unit, which match with your computer or/and with single-channel or multi-channel sensor/receiver. Because the specified characteristic provides increased control range output power of the laser, it can be expected that when a set of control actions on deformable mirrorswhere N is the number of deformable mirrors in the cavity, lasing in the laser to cease because of full resuscitate resonator. It is clear that this is only possible when sufficient total managed deformations of the optical surface of deformable mirrors, which can be provided by replacing the required number of regular mirrors of the laser resonator deformable or installation in a cavity of the required number of additional deformable mirrors. Similarly, when a set of control actions on deformable mirrorsthe output power of the laser radiation reaches its nominal value. Under the last will understand the value of the radiation power of the laser, which contains only a standard (non -) mirrors. Generally speaking, when managing impacts on the Def to match the resonator with the standard mirrors. Due to the fact that the curvature of the reflective surface of the deformable mirror is controlled, there is the possibility of fine adjustment of the geometry of the resonator at a nominal output power of the laser with the aim of optimizing (maximizing). Therefore, it can be expected that when a set of control actions on deformable mirrorsother thanthe output power of the laser with managed resonator will slightly exceed the rated output power and will reach its maximum. The likely cause is the optimal filling of the radiation of the active medium inside the resonator in the management of deformable mirrors, see Vorontsov, M. A., Schmalhausen Century. And. Principles of adaptive optics. - M.: Nauka, 1985, S. 108. Control actions deformable mirrors, includingand, formed by the control unit according to commands from the computer and/or signals single-channel or multi-channel sensor/receiver. Thus, the proposed method provides, first, a complete damping of the generation of laser radiation and, secondly, a partial increase of the nominal output power La is e one mirror of the laser using a deformable mirror or as all the mirrors of the laser using a deformable mirror, the reflective surface shape of each of the deformable mirror is controlled by means of an electrical effects generated by the control unit, which match with your computer or/and with single-channel or multi-channel sensor/receiver.

In the process control the laser cavity pulse-periodic mode of generation in a continuous laser is ensured by the fact that the control unit matches with the computer or with a generator of electrical signals, and control actions, at least two deformable mirrors, or all of deformable mirrors of the laser is formed in the form of sequences of pulses that are synchronized relative to each other with a constant or variable phase shift. Indeed, if the proposed method provides a complete damping of the generation in the laser due to the replacement of standard optics deformable (or due to the installation of the additional resonator deformable optics) and control the latter, at any time when the control actions on the deformable mirrors conform to setthe output radiation power of the laser is equal to zero. Any simultaneous (synchronous), and f">) will cause lasing in the laser resonator, the value of the power of the output radiation is determined by the current values of control actions Ik, k=1,..., N. Each Ikranges, k=1,..., N. Consequently, the pulse shaping control actions on the deformable mirrors in this way, we obtain a pulse-periodic variation of the output power of the laser. Impulse control actions on the deformable mirrors are formed by the control unit according to commands from the computer either by amplifying signals from an external generator. The pulse frequency of the radiation can be arbitrarily small, and the minimum duration is limited by the performance of deformable mirrors. Forming pulse control actions on the deformable mirrors with a constant phase shift, it is possible to obtain an increase in the frequency of the pulse-periodic radiation output of the laser, as well as to control the duty cycle, duration and form of pulses of radiation. Thus, due to the formation of impulse control actions specified by the proposed method provides an implementation of a pulse-periodic mode g the control match with the computer or with a generator of electrical signals, and control actions, at least two deformable mirrors, or all of deformable mirrors of the laser is formed in the form of sequences of pulses that are synchronized relative to each other with a constant or variable phase shift.

When implementing the control method of the laser resonator receiving pulses of laser radiation with an amplitude greater than the average power of the laser in continuous mode, is provided in the pulse-periodic mode laser with a duration of synchronous pulses of control effects on deformable mirrors. Indeed, suppose that at some point in time, the output radiation power of the laser is equal to zero (the control actions on the deformable mirrors conform to setand at this point synchronous change of control effects, sofor all k=1,..., N. This change leads to the generation of the laser, so that at the beginning of the radiation pulse is displayed, the energy stored in the active medium time between pulses. This, of course, means that the laser is continuously pumped. After you is this case, maximum power, becausefor all k=1,..., N) up until again the control actions on the deformable mirrors synchronously will not change their values tofor all k=1,..., N. Therefore, at the initial radiation pulse at a constant governing the effects on deformable mirrors power output of the laser is higher than the nominal (maximum) power over the entire pulse. In other words, at the initial radiation pulse is a burst power. Note that in this scheme, the laser control the duration of such emissions is limited by the resonant frequency of the deformable mirror, because the response time of the mirror exceeds the turn-on time of generation of the laser. So it is, when the duration of the synchronous pulses of control actions coincides with the duration of the burst power, then the power in the pulse is increased in comparison with the nominal (maximum) power in continuous mode. When the repetition period of the synchronous pulses of control actions should be chosen so that the time between pulses in the active medium of the laser were stocking up on the necessary amount of energy. In accordance with above what plitude, exceeding the average power of the laser in continuous mode. Thus the relevant distinguishing feature is that the control unit matches with the computer or with a generator of electrical signals, and control actions, at least two deformable mirrors, or all of deformable mirrors of the laser is formed in the form of sequences of pulses that are synchronized relative to each other with a constant or variable phase shift.

Another distinctive feature of the proposed method is that to increase the control range output power of laser radiation, including, on the one hand, the full repayment of generation and, on the other hand, a partial increase of the nominal output power of the laser, the curvature radius of the source optical surfaces, at least one of a deformable mirror or all of deformable mirrors RDish.i, 1iN, where N is the number of deformable mirrors in the laser, choose from the relation

the legend in the formula presented above. The essence of the above correlation is that the original optical surface (i-th defy surface of the mirror when it is vacuum-tightly rolled back in the laser resonator. The value ofhthe HAC.i, i=1,... N, pre-determined or calculated or experimentally. In addition to these amendments when forming the initial shape can also be taken into account amendments, resulting in a symmetric position (or Vice versa shift range control cavity due to the i-th deformable mirror relative to the operating range of control actions that mirror.

To achieve the technical result in the device for implementing the method (controlled laser resonator containing a deformable mirror, coupled with electronic control unit, at least one laser mirror made with the possibility of deformation of the reflective surface or all of the mirrors of laser made with the possibility of deformation of the reflective surface due to electrical effects generated by the control unit that is connected with your computer, or/and with a generator of electrical signals, or/and with single-channel or multi-channel sensor/receiver.

Increase the control range output power of laser radiation, including, on the one hand, the full repayment of generation and, on the other hand, partial Piney least one mirror of the laser is made with the possibility of deformation of the reflective surface or all of the mirrors of laser made with the possibility of deformation of the reflective surface due to electrical effects generated by the control unit that is connected with computer or/and with single-channel or multi-channel sensor/receiver. Detailed justification of these benefits was made, when considering ways to control the laser resonator (see above).

Pulse-periodic mode of generation in a continuous laser, including the receipt of pulses of laser radiation with an amplitude greater than the average power of the laser in continuous mode, is provided in the proposed device due to the fact that the control unit is interfaced with a computer or with a generator of electrical signals. Indeed, if the specified distinctive feature of the proposed device is executed, the control actions of the at least two deformable mirrors, or all of deformable mirrors of the laser resonator can be formed in the form of sequences of pulses that are synchronized relative to each other with a constant or variable phase shift. Thereby Kasaba, but these advantages were explained in detail when considering the above.

Another distinctive feature of the proposed device is that to increase the control range output power of laser radiation, including, on the one hand, the full repayment of generation and, on the other hand, a partial increase of the nominal output power of the laser, the curvature radius of the source optical surfaces, at least one of a deformable mirror or all of deformable mirrors RDish.i1iN, where N is the number of deformable mirrors in the laser, may satisfy the relation

A detailed rationale for this preference was given above when considering how to control the laser resonator.

The method of control of the laser resonator and device for its implementation is illustrated by drawings.

In Fig.1 schematically shows a device managed multiple-mirror laser resonator with multiple deformable mirrors. In Fig.2 shows the device of the ring managed resonator with deformable mirrors. In Fig.3 shows unsteady driven cavity with korpusa 1 deformable mirrors 2 and partially transparent output mirror 3, the control unit 4, a generator of electrical signals 5, a computer 6 and a single-channel or multi-channel sensor/receiver 7. Depending on the optical scheme of a deformable mirror 2 is installed in the resonator as the end mirrors (Fig.1), the turning mirrors (Fig.1-2), reflector and contraflexure (Fig.3). In Fig.1-3 large arrows indicate the optical beam emerging from the controlled resonator; solid lines with arrows show the direction of passage of electrical signals between the electronic devices; the dashed line arrow shows a possible, but optional connection of the sensor 7 and the computer 6.

Work driven laser resonator is explained by the functioning of its constituent devices. Let the design of the resonator does not imply a vacuum-tight installation resonator optics (Fig.1-3 not shown), and let the initial optical shape (curvature) of each of the deformable mirror 2 (Fig.1-3) corresponds to the curvature of a regular mirror of the laser, instead of which is mounted a deformable mirror. Then when you install deformable mirrors 2 in the resonator (in accordance with the optical scheme of the latter, see Fig.1-3) its geometry will fully comply with Stadtische radiation 8, output power which corresponds to the regular power of the laser. Note that the control actions on the deformable mirrors are absent (zero).

Now suppose that at some point in time from the host computer 6, see Fig.1-3, the control unit 4 receives a command to set the new value of the control actions Ikfor all k=1,..., N. the Block 4 will run that command and thereby control inputs to the deformable mirror 2 will be equal to Ik, k=1,..., N, with the reflective surface of each mirror 2 is deformed, i.e., changes its curvature. This, in turn, leads to a change in optical geometry (configuration) of the resonator and, therefore, to change the output power of the laser. Thus, when changing the control actions to the deformable mirror 2 is changed Ik, k=1,..., N, deformable mirrors 2 changes the output power of the laser radiation. Full alignment is poor resonator (with a set of control actionson deformable mirrors 2 lasing 8 in the laser will stop and the power output will drop to zero. On the other hand, when the optimal alignment of the resonator (if n is ewnost laser reaches its maximum. Moreover, in accordance with the above consideration of the maximum power of the laser with managed resonator may exceed the rated output power during normal mirrors. In the case where the deformable mirror is installed in the laser advanced (for example, at the development stage), his work is similar.

It should be added that the control unit 4 (Fig.1-3) can generate the necessary control actionsk, k=1,..., N, deformable mirrors 2 signal single-channel or multi-channel sensor/receiver 7. Moreover, these devices 4 and 7 may be connected directly (solid arrow in Fig. 1-3), and through the control computer 6 (dotted arrow). A deformable mirror 2 can be operated as a common control unit 4 (see Fig.1-3) and a separate control units for each mirror or group of mirrors (Fig.1-3, this option is not shown). In the latter case, some control units 4 can be paired with the computer 6, the other with a sensor/receiver 7.

Thus, based on the above, it can be argued that the proposed controlled laser resonator provides effective management o which of these distinguishing features - namely, that at least one laser mirror made with the possibility of deformation of the reflective surface or all of the mirrors of laser made with the possibility of deformation of the reflective surface due to electrical effects generated by the control unit that is connected with computer or/and with single-channel or multi-channel sensor/receiver - described technical solution provides guaranteed a substantial increase in the control range output power of laser radiation, including, on the one hand, the full repayment of generation and, on the other hand, a partial increase of the nominal output power of the laser.

With the aim of obtaining a pulse-periodic mode of generation in a continuous laser, including a laser radiation pulse with an amplitude greater than the average power of the laser in continuous mode, the proposed managed the laser cavity to the control unit 4 (Fig.1-3) are periodic commands from the host computer 6, so that the control actions of Ik, k=1,..., N, deformable mirrors 2 are sequences of pulses that are synchronized relative to each other with a constant or changing sh mirrors 2 there, k=1,..., N, the output power of the laser radiation will be equal to zero. If different control actions Ik, k=1,..., N, from the set of(asidefor any Ik) the output power of the laser will meet some specified level. However, as noted earlier, at the initial time of each pulse is a burst of power that ensures the receipt of pulses of laser radiation with an amplitude greater than the average power of the laser in continuous mode.

You can add that control actions on the deformable mirror 2 can be formed not only on commands from the computer 6, but also by amplifying signals from the generator 5 (Fig.1-3). A deformable mirror 2 can be operated as a common control unit 4 (see Fig.1-3) and a separate control units for each mirror or group of mirrors (Fig.1-3, this option is not shown). In the latter case, some control units 4 can be paired with the computer 6, the other with a generator of electrical signals 5.

Thus, by combining these distinctive features, namely that the control unit is interfaced with a computer or with a generator when the number of pulses of laser radiation with an amplitude, exceeding the average power of the laser in a continuous mode, i.e., will be made to the above technical result.

It should be noted that in accordance with the proposed method of controlling the laser (p. 2 claims) pulse control inputs to the deformable mirror 2 (Fig.1-3) may be formed in various ways, in particular with a different phase shift relative to each other. Due to this, it is possible to increase the frequency of the pulse-periodic radiation output of the laser, and the control duty cycle, pulse duration and pulse shape of the output radiation. The operation of the device in these cases corresponds to the above description.

When the design of the resonator involves a vacuum-tight installation resonator optics, reflective surface of the deformable mirror 2 are amendedhthe HAC.isee S. 10. The optimum radius of curvature of the original reflective surface of the deformable mirror RDish.iwith regard to this amendment can be calculated by the following formula:

symbols in the formula have been shown earlier. Ultimately, these poprawnego, due to them can be lowered requirements for control units 4 on the magnitude of the output signal. Work managed laser in this case is similar to the previously described.

It is appropriate to make the following comments regarding the proposed method of control the laser resonator and devices based on it.

1. With the simultaneous replacement of several mirrors of the laser deformable mirrors, as shown in Fig.1-3, an additional useful feature: reduced requirements for control units 4 on the magnitude of the output signal. It does not matter what deformable mirrors are used: identical or different, such as piezoelectric and hydraulic.

2. The use of multiple deformable mirrors in lasers with unstable resonators (Fig.3) in addition to the mentioned features has the following advantages:

- no side astigmatism, because the mirror unstable resonator are normal to the optical beam;

- the possibility of effective phase correction of optical radiation, since, as a rule, in an unstable resonator is generated wide optical beam.

3. The device is based on the proposed method of controlling the laser Gcast, the optical scheme, for example, two-mirror unstable resonator (Fig.3) and two-mirror lens is very similar.

4. Used in this way and the device is a deformable mirror can be both single-and multi-channel. The latter can be used in the cavity to solve the traditional problems of adaptive optics compensation of distortion in real time, and so on).

One of the practical use cases of the present invention is to expand the range of materials in laser material processing systems, improving the quality and performance of laser processing.

Claims

1. The method of controlling a laser resonator, which as its mirror using a deformable mirror, the reflective surface shape of which is controlled by means of an electrical signal generated by the electronic control unit, characterized in that at least one mirror of the laser using a deformable mirror or as all the mirrors of the laser using a deformable mirror, the reflective surface shape of each of the deformable mirror is controlled using an electric impact is s or/and with single-channel or multi-channel sensor/receiver, the radius of curvature of the original optical surface, at least one of a deformable mirror or all of deformable mirrors Rdish.i, 1iN, where N is the number of deformable mirrors in the laser, choose from the relation

where DZ- luminous diameter of the i-th deformable mirrors;

Rex.ithe radius of curvature of the i-th replacement mirror;

hthe HAC.i- deformation (change of arrow deflection) of the i-th deformable mirrors if set, vacuum tightly rolled back in the laser resonator.

2. The method according to p. 1, characterized in that the control actions of the at least two deformable mirrors, or all of deformable mirrors of the laser is formed in the form of sequences of pulses that are synchronized relative to each other with a constant or variable phase shift.

3. Controlled laser resonator containing a deformable mirror, coupled with electronic control unit, characterized in that at least one laser mirror made with the possibility of deformation of the reflective surface or all of the mirrors of the laser is performed with opportunities connected with the computer or with a generator of electrical signals or/and with single-channel or multi-channel sensor/receiver, the radius of curvature of the original optical surface, at least one of a deformable mirror or all of deformable mirrors RDish.i, 1iN, where N is the number of deformable mirrors in the laser, satisfy the following relations:



 

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2 dwg

Gas laser // 2278454

FIELD: quantum electronics, possible use for creating wave guiding two-channel gas lasers with collapsible U-shaped resonator with high power level of radiation.

SUBSTANCE: gas laser contains adjustment device. Adjustment device includes first and second bushings. Each bushing consists of serially positioned flanges with adjusting screws, portion with deformable neck, constituting upper portion of adjustment device, and clamping portion. In flanges of first and second bushings, respectively, hollow cylinder and cylinder-shaped rod with base are positioned, with internal portion of adjustment device positioned on each one of them and having a gap with portions of deformable neck and clamp. Internal portion of adjustment device for hollow cylinder is made in form of base with aperture and mirror with covering, non-transparent for laser radiation. For cylinder-shaped rod with base aforementioned internal portion is made in form of diffraction array or mirror with cover, highly reflective for laser radiation. Mirror is positioned on base in front of second discharge channel. Cylinder-shaped rod is made with hollow along axis, wherein an insert is positioned made of material with high thermal conductivity coefficient.

EFFECT: possible production of wave-guiding two-channel gas laser with U-shaped resonator, providing for high level of power of laser radiation.

3 cl, 7 dwg

Wide-aperture laser // 2279745

FIELD: quantum electronics, devices for emission and amplification of laser radiation used for action on objects with large areas and volumes.

SUBSTANCE: the laser has a fixed base, body with an active medium in the form of a cylindrical tube, rotator, optical pumping source and a cooling device. At least two optical pumping radiators are positioned inside the active medium. Mirrors of pumping radiation concentration are installed outside relative to the axis of rotation. The resonator mirrors are made cylindrical. The center of the radius of curvature of the resonator mirrors coincides with the axis of rotation of the active medium. The generating lines of the resonator mirrors and the generating lines of the cylindrical surface of the active medium are mutually parallel. Rotation of the body provides circulation of the active medium through the area of emission and effective cooling.

EFFECT: enhanced aperture of laser emission, enhanced efficiency and power, enhanced adaptability to manufacture and service.

3 cl, 4 dwg

FIELD: laser engineering; developing lasers and spectrometers around them.

SUBSTANCE: proposed laser has case accommodating resonator. The latter has two discharge channels, output mirror, two turning mirrors, and spectral selective member (diffraction grating). The latter is disposed opposite first discharge channel in adjusting unit secured on butt-end of hollow cylinder joined through elastically deformed part to cylindrical bush. Disposed on external surface of hollow cylinder are movable lever and supporting flange rigidly fixed together. Output mirror is disposed on adjusting mechanism between second discharge channel and through hole provided in supporting flange and movable lever. One end of the latter is kinematically coupled with electromagnet and other one, with butt-end surface of cylinder flange.

EFFECT: enhanced precision of wavelength selection and radiation power stability.

3 cl, 5 dwg

Tunable laser // 2244368

FIELD: laser engineering; tunable lasers.

SUBSTANCE: laser has case accommodating cavity incorporating active medium, output mirror, and spectral-selective element in the form of diffraction grating. Grating set up in bezel is connected through first adjusting mechanism to loose end of moving lever. Other end of the latter is locked in position by means of spherical supports in U-shaped flange connected through second adjusting mechanism to laser case. Loose end of moving lever is kinematically coupled with micrometer screw. Provision for individual and independent adjustment of dispersion plane of diffraction grating and axis of revolution of moving lever, with this position being maintained in the course of operation, ensures steady and reliable functioning of laser under all mechanical and environmental impacts.

EFFECT: enhanced, reliability, reproducibility and precision of wavelength selection.

1 cl, 3 dwg

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