Device for stabling semiconductor laser operation wavelength

Abstract

The device for stabilizing semiconductor laser working wavelength comprises: a light collector set on the back cavity of the laser chip, output end of the collector connects with a fiber coupler through optic fiber, one output path of the coupler connected with the first input end of a SCM through a optical filter and a second detector, another output path of the coupler connected with the second input end through a first detector; a thermistor with output end connected with the third input end of the SCM, and the SCM with its first / second output end connected with the control end of the refrigerator power / the laser drive power. This invention ensures accurate laser length with low cost, and has no effect on laser and its package structure.

Description

technical field [0001] The invention relates to lasers, in particular to a device for stabilizing the working wavelength of semiconductor lasers used for pumping solid lasers. Background technique [0002] All-solid-state lasers pumped by high-power semiconductor lasers are a hot spot in recent years. Compared with the flash lamp pump light source, the semiconductor laser pump light source has outstanding advantages. Semiconductor lasers have high electro-optical conversion efficiency, small size and easy to use. More importantly, its spectrum matches well with the absorption spectrum of the laser material, so the thermal effect generated is small, which is very conducive to improving the working stability and beam quality of solid-state lasers. [0003] However, the emission wavelength of a semiconductor laser varies greatly with its operating temperature. This temperature relationship is mainly derived from the temperature relationship of the band gap of semiconductor m...

AI Technical Summary

Problems solved by technology

The working state of the laser may also change according to the requirements of the use during use, and it cannot remain the same as when the characteristics of the laser were measured before installation

Therefore, it may not be the best working state to determine the working state only based on the wavelength temperature coefficient measured in advance.

Images