Device for control of laser radiation

 

(57) Abstract:

Usage: the invention relates to techniques for measuring the characteristics of laser radiation and applicable in laser technology. The essence of the invention: device for controlling radiation of the laser light receiver is located inside the cavity of the laser and is made in the form of a matrix receiving elements, which can be made in the form of an annular matrices receiving elements or iris diaphragm. 2 C.p. f-crystals, 2 Il.

The invention relates to techniques for measuring the characteristics of laser radiation and applicable in laser technology.

A device for control of laser radiation, containing a thermal radiation detector [1] the Disadvantage of this technical solution is the impossibility of registration of the spatial distribution of the diffraction intracavity laser losses.

The closest technical solution to the claimed is known device for control of laser radiation, containing photovoltaic radiation detector [2]

This device has the same disadvantages as [1]

An object of the invention is to register the spatial distribution of nutrire in the form of a matrix receiving elements and is to register rays that do not fit into the active element.

In particular, the radiation detector may be in the form of at least one annular matrix of the receiving elements. An alternative is to perform a matrix receiving elements so that it forms an iris.

Comparison with the prototype shows that the claimed invention meets the criterion of "Novelty". In the art technical solutions are not found, which contain the features that distinguish the invention from the prototype, so it meets the criterion of "Inventive step".

In Fig.1 shows an example of a specific use of the claimed invention, and Fig.2 is an example of executing an annular matrix of the receiving elements.

The photodetector 1 (Fig. 1) registers the intensity of the laser beam 2 passing through the output mirror 3. Part of the reflected beam 4, which represents the intracavity laser losses registered by the matrix of the receiving elements 5. The remaining part of the beam of laser radiation passes through the active laser element 6. Intracavity laser loss on the other side of the element 6 register matrix admission is 1, 5 and 7 are compared by the device 10, through which the registration of the spatial distribution of the diffraction intracavity laser losses. The light-sensitive surface 11 and 12 receivers 5 and 7 facing the mirrors 3 and 9. The diameter of the holes in the matrix of receivers 5 and 7 is equal to the diameter of the active element 6. They are as close as possible to the ends of the element 6. The implementation of the radiation receiver in the form of a matrix receiving elements 5 and 7 provides registration of the spatial distribution of the diffraction intracavity laser losses. In particular, the receiver may be made in the form of an annular matrices receiving elements (Fig.2), for example, the same square or iris.

The proposed device was used to measure the intracavity diffraction losses lasers based on garnet, emitting in the wavelength range from 1 to 3 μm. Reception elements (at least 50) have the same area. The spatial distribution of the diffraction intracavity laser losses were recorded with an accuracy better than 10% of the Elements of the receiver 5 and 7 were made from known materials, is designed for the wavelength of these laser materials.

1. DEVICE FOR CONTROL of LASER RADIATION, containing the active element, which is installed in the cavity formed by two mirrors, and a radiation receiver, characterized in that it introduced at least one additional radiation receiver, which is made in the form of a matrix receiving elements and is mounted inside a cavity of the laser so as to register the rays reflected from the mirrors and not fall into the active element.

2. The device under item 1, characterized in that the additional radiation receiver is made in the form of at least one annular matrix of the receiving elements.

3. The device under item 1, characterized in that the matrix of the receiving elements is designed in such a way that it forms an iris.

 

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