Spectrum beam combining device based on back cavity outer cavity spectrum regulation and control

Abstract

The invention provides a spectrum beam combining device based on back cavity outer cavity spectrum regulation and control, which comprises a semiconductor laser system, a back cavity outer cavity spectrum regulation and control system and a front cavity common aperture beam combining system, wherein the back cavity outer cavity spectrum regulation and control system receives a laser beam array output from one side of the semiconductor laser system, modulates the laser beam array and feeds back the laser beam array to the semiconductor laser system, a laser beam array output by the other side of the semiconductor laser system is regulated and controlled at a certain spectral interval and is locked on different central wavelengths, and the spectrum width of each laser beam in the array is narrowed; and the front cavity common-aperture beam combining system performs common-aperture beam combination on the laser beam array output by the other side of the semiconductor laser system and outputs the laser beam array. According to the scheme provided by the invention, decoupling of spectrum regulation and control and common-aperture beam combination output is realized, and the beam combination efficiency is improved while dense arrangement of spectrums is realized; and the rear cavity outer cavity adopts a total reflection mirror for laser feedback, so that more stable and reliable spectrum regulation and control are realized.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a spectral beam combining device based on the control of the spectrum of a back-cavity extracavity. Background technique [0002] Semiconductor lasers have the advantages of wide wavelength coverage, high electro-optical conversion efficiency, small size, low cost, and long life. They have broad application prospects in military defense, industrial processing, health care, scientific research, and many other fields. However, the shortcomings of current commercial semiconductor laser units, such as low output power and poor beam quality, limit its direct application. The common-aperture spectral synthesis technology based on diffraction elements can guarantee high beam quality while realizing semiconductor laser output power amplification. In theory, the beam quality after synthesis is equivalent to that of a single light-emitting unit participating in the synthesis. Research on L...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of insufficient conversion efficiency and poor stability of spectral control in the existing chip-based common-aperture spectral synthesis technology, a technical solution of a spectral beam combining device based on the spectral control of the rear cavity and extracavity is provided.

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