Semiconductor laser device with stable wavelength

Abstract

The invention discloses a semiconductor laser device with stable wavelength. The semiconductor laser device comprises a power supply, an LD module and an optical fiber beam combiner, the plurality of LD modules are arranged in parallel, each LD module is independently connected with one power supply function module, the power supply function modules are connected with a power supply, and the LD modules connected with the power supply function modules are connected or disconnected through the power supply function modules; output optical fibers of the LD modules are connected with an input arm of an optical fiber beam combiner, and a light source is output through the beam combiner. The semiconductor laser device with the stable wavelength has the advantages of being stable in wavelength in a full power range, adjustable in power grading, efficient in distributed heat dissipation, resistant to high and low temperature environment work, easy to maintain and capable of achieving engineering.

Description

technical field [0001] The invention relates to a semiconductor laser device with stable wavelength, belonging to the technical field of semiconductor lasers. Background technique [0002] Semiconductor lasers have important application values ​​in fiber laser pumping sources, industrial processing, high-precision laser detection, and high-precision molecular absorption. However, semiconductor lasers with narrow linewidth and stable wavelength have higher pumping or absorption efficiency in applications, and the demand is increasing. Compared with optical fiber or solid-state lasers, semiconductor lasers have poor beam quality, and the wavelength is affected by power or current and temperature. The traditional wavelength-stabilized semiconductor laser light source adopts VBG locking or grating external cavity locking, but there is a disadvantage of wavelength loss at low power. Traditional electrical switches are connected in parallel on each laser and connected in series ...

AI Technical Summary

Problems solved by technology

Compared with optical fiber or solid-state laser, semiconductor laser has poor beam quality, and the wavelength is affected by power or current and temperature.

Traditional wavelength-stabilized semiconductor laser light sources use VBG locking or grating external cavity locking, but there is a disadvantage of wavelength loss at low power

Traditional electrical switches are connected in parallel on each laser and connected in series with each other, and the lasers are also connected in series. Due to the delay or asynchrony of the switch, the voltage of multiple lasers will be loaded on the same laser at the same time, causing the laser to be electrically destroyed.

[0003] Aiming at the shortcomings of existing semiconductor lasers, a semiconductor laser with stable wavelength in the full power range is needed to make up for the problem of traditional VBG locked semiconductor laser modules losing lock at low power

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