High-power spectral synthesis method based on transmission type optical grating

A combination method and high-power technology, applied in the field of strong lasers, can solve problems such as poor adjustment, unsuitability for high-power and ultra-high-power combination, complex multi-beam combination process, etc., to achieve high combination power, strong practical value, and simple The effect of the conditioning process

Inactive Publication Date: 2015-03-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, this type of beam combination has certain restrictions on the wavelength and power of the beam. The traditional multi-beam combination process is complicated and difficult to adjust. In addition, the traditional multi-beam

Method used

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  • High-power spectral synthesis method based on transmission type optical grating
  • High-power spectral synthesis method based on transmission type optical grating
  • High-power spectral synthesis method based on transmission type optical grating

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Embodiment Construction

[0021] The technical principle of the present invention is as image 3 shown.

[0022] In this embodiment, an example of the device is given as Figure 4 As shown, it includes the first heat sink 1, the first fiber laser 2, the first aspheric collimator lens adjustment mount 3, the first aspheric collimator lens 4, the second heat sink 6, the second fiber laser 7, the second Aspherical collimator lens adjustment frame 8, second aspheric collimator lens 9, focusing lens 11, focusing lens fixing frame 12, transmission grating 13, adjusting frame moving plate 14, adjusting frame piezoelectric ceramics 15, fine-tuning screw 16, adjusting The fixed plate 17, the first half-wave plate 19, and the second half-wave plate 21.

[0023] The transmission grating 13 is a custom-made special grating with high damage threshold, which can carry 100000w optical power.

[0024] The laser beam emitted by the first fiber laser 2 with a power of 5000W and a wavelength of 1000nm is collimated by...

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Abstract

The invention relates to a high-power spectral synthesis method based on a transmission type optical grating and belongs to the technical field of high power laser. A multi-beam laser source is located at the focal point of a focusing lens and emits a plurality of parallel laser beams which are all located on the same side of the central optical axis of the focusing lens and cannot be distributed on the two sides of the central optical axis at the same time. Each laser beam orderly passes through a collimating lens and a half-wave plate and then transmits through the focusing lens. The high-power transmission type optical grating is placed at the focal point on the other side of the focusing lens and the central optical axis of the focusing lens passes through the center of the optical grating. The wavelengths of the incident laser beams are selected according to the first-level diffraction conditions of a diffraction equation so that the incident beams can be different in incident angle and the same in diffraction angle. As a result, the incident laser is output through first-level diffraction completely according to the same diffraction angle, and laser beam combination is realized. The single beams of more than 100000W can be synthesized, and the high-power transmission type optical grating is enabled to be higher than a reflective optical grating in diffraction efficiency and synthetic power.

Description

technical field [0001] The invention relates to a high-power spectrum synthesis method based on a transmission grating, which belongs to the technical field of strong lasers. Background technique [0002] Laser synthesis is becoming more and more important in industry, scientific research and military applications. Multi-beams are synthesized by means of wavelength division multiplexer WDM or beam splitting prisms, lenses, etc. Usually, multi-beam synthesis requires multiple synthesis processes, such as figure 1 , as shown in 2. However, this type of beam combination has certain restrictions on the wavelength and power of the beam. The traditional multi-beam combination process is complicated and difficult to adjust. In addition, the traditional multi-beam combination method is not suitable for high-power and ultra-high-power combination. Special wavelength Laser synthesis. For high-power beam synthesis and special wavelength laser synthesis, there is no related report. ...

Claims

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Application Information

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IPC IPC(8): H01S3/23
Inventor 彭瑜李伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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