Later transmitting device

FIELD: laser engineering.

SUBSTANCE: proposed device has pumping unit, resonator, semiconductor mirror, output lens, and input lens. Optical output of pumping unit is optically coupled with resonator whose optical output is coupled through semitransparent mirror with optical input of output lens. Newly introduced in device are optically controlled transparent amplifier, additional light source whose frequency exceeds resonator radiation frequency, three reflecting mirrors, and one more semitransparent mirror. Resonator optical output is coupled in addition through semitransparent mirror with first optical input of optically controlled transparent amplifier whose second optical input is coupled through additional semitransparent mirror with output of additional light source and optical output is coupled through three reflecting mirrors, additional semitransparent mirror, and second lens with resonator for its additional pumping.

EFFECT: enhanced power without increasing device mass.

1 cl, 1 dwg

 

The invention relates to the field of optical technology and can be used in systems that use a laser.

Known laser transmitting device described in the book Lesukov 1978, M. "Handbook of infrared technology", p.108. With the help of block pump and resonator, in which the active substance is performed on the crystals, by the formation of the laser beam through the output lens is radiated into space. However, due to losses in the resonator, resulting from pumping a broadband source, decreases the power output.

Known laser using a feedback circuit, which represents the laser transmitting device set forth in U.S. patent No. 3633124, class H 01 S 3/10 from 1972 also using the pump and resonator, where the active substance is performed on the crystals is the formation of a laser beam through a translucent mirror and through the output lens goes in space. From the semitransparent mirror light energy is also reflected and irradiates the photodetector, which together with other nodes is a photodetector amplifier is a device that converts light energy into electrical signals and generates the amplified AC signals coming in modulating the lamp pumping, coloraod the action of these signals emits light energy, passing through the lens in the cavity. Therefore, the positive feedback increases the output power of the resonator. However, the magnification power is also limited due to losses that occur during pumping. So you need a powerful bulky electrically operated control valve of the pump, i.e. the increase in power is impossible without increasing the bulkiness.

Using the proposed device provides an increase in the radiation power without increasing the bulkiness.

This is achieved by the introduction of: optically controlled transparent amplifier, an additional light source with a frequency exceeding the frequency of the radiation of the resonator, three reflective mirrors and additional semi-transparent mirror, and the optical output of the resonator is additionally connected through a semitransparent mirror with the first optical input optically controlled transparent amplifier, in which a second optical input is connected via an additional semi-transparent mirror with the output of the additional light source and the optical output optically controlled transparent amplifier through three reflective mirrors, additional semi-transparent mirror and a second lens connected on the resonator with the possibility of additional pumping.

On th the same, and in the text the following notation:

1, 2, 3 - reflective mirrors;

4 - optically addressable transparent amplifier;

5 - additional semitransparent mirror;

6 - additional light source with a frequency exceeding the frequency of the radiation cavity;

7 - lens;

8 - output lens;

9 is a semi - transparent mirror;

10 - resonator;

11 is a block pumping.

When this optical output block pump 11 is optically connected to the resonator 10, the optical output of which through the semi-transparent mirror 9 is connected on the optical input of the output lens 8 and the first optical input optically controlled transparent amplifier 4, whose second optical input is connected via an additional semi-transparent mirror 5 about the release of an additional light source with a frequency exceeding the frequency of the radiation of the resonator 6 and the optical output optically controlled transparent amplifier 4 through the reflective mirror 3, 1, 2, optional semi-transparent mirror 5 and a lens 7 is connected with the resonator 10.

The operation of the device is as follows.

With the help of the resonator 10, block pump 11 by the formation of the light energy, which through the semi-transparent mirror 9 and the output lens 8 goes into space. In the resonator as the active layer can be used crystal. In the pumping unit 11 applies the I direct lamp, located along the active element of the resonator, for example, as shown in the book “Meet the lasers. Radio, 1983, figure 2.6. To implement the second irradiation of the active layer of the resonator 10 with a frequency exceeding the frequency of its radiation, the light source c is a frequency exceeding the frequency of the radiation of the resonator 6. A distinctive feature of this device is that additional pumping is carried out by the light from the above source 6, amplified optically controlled transparent amplifier 4, and its range provides maximum generation of the active layer of the resonator 10. Managing light in the optically addressable transparent amplifier receives at its first optical input from the optical output of the resonator 10, previously reflected from the above-mentioned semi-transparent mirror 9. An example of specific performance of optically controlled transparent amplifier presents, for example, in the book Echoridge and others, "Introduction to optical electronics", M, High school, 1991, p.83-85, Risa, where the incoming light beam.

In it the light amplification is due to the excess intensity of the output beam on managing light source, the frequency of which may be less than the frequency of the light received at its input. However otlitchaetsja is in this device there is no need to use mosaic as managing wave covers all areas of a photoconductive layer. Enhanced light output optically controlled transparent amplifier 4 is further successively reflected from the reflective mirror 3, 1 and 2 and passes through an additional semi-transparent mirror 5 to the lens 7. The latter forms the beam divergence, which was irradiated with an active layer resonator 10.

The sequence of operation of the device is as follows. After you enable direct lamp block pump 11, the resonator 10 emits light energy, and an additional irradiation power of the light in the active layer of the resonator 10 range exceeding the frequency of the resonator, which causes the maximum generation. This increases the efficiency of the conversion of the pump power into output power. Thus, increasing the radiation power of the resonator 10, and hence the capacity of the controlled light energy. Further, the multiple circulation along the contour is avalanche-like increase in power when using a positive feedback, which compensates for the loss of light energy when passing through the semitransparent mirror 5 and 9. Therefore, the optimal pumping time equal to the time m is xymalos power.

An additional source of light with a frequency higher than the frequency of the radiation of the resonator 6, must have sufficient power to start the amplification process.

The proposed device can be used in systems where it is necessary to increase the radiation power without additional energy costs. This improves the performance characteristics of laser systems and their economic efficiency.

Laser transmitting device, consisting of a block-pumped resonator mirror, the output lens and the second lens, and the optical output power optical pumping associated with the resonator, the optical output of which through the translucent mirror is connected with the optical input of the output lens, characterized in that the input optically addressable transparent amplifier, an additional light source with a frequency exceeding the frequency of the radiation of the resonator, three reflective mirrors and additional semi-transparent mirror, and the optical output of the resonator is additionally connected through a semitransparent mirror with the first optical input optically controlled transparent amplifier, in which a second optical input is connected via an additional semi-transparent mirror with the release of an additional light source and the optical output optically controlled the constituent transparent amplifier through three reflective mirrors, additional semi-transparent mirror and a second lens associated with the resonator with the possibility of additional pumping.



 

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