Optimum temperature detection device for semiconductor laser light source body

Abstract

The invention provides a device for detecting the optimal temperature of the light source body of a semiconductor laser, which is characterized in that: it includes a light source body, which contains the luminous body in the existing laser, and is placed in the installation box; the main control module includes a power transistor and a temperature sensor for detecting the temperature of the light source body; the auxiliary control module includes a brass base arranged at the bottom of the installation box, and a thermistor for detecting the temperature of the light source body is arranged on the brass base; the light detection module uses The laser module is used to detect the intensity of the main light output by the laser, and obtain the light intensity signal. The laser module receives the command from the central processor and controls the laser to output the main light according to it; The light intensity signal and the temperature signal from the temperature sensor and thermistor. The invention effectively realizes the multi-layer temperature control of the light source body, and at the same time ensures that the selection of the temperature control temperature achieves the best effect.

Description

technical field [0001] The invention belongs to the field of semiconductor laser production, and in particular relates to a device for detecting the optimum temperature of a semiconductor laser light source body. Background technique [0002] Since the birth of the first semiconductor laser in 1962, after decades of research, the research on semiconductor lasers has made great progress. The wavelengths range from infrared, red to blue-green, and the coverage is gradually expanding. Various performance parameters have also been developed. Great improvement. Compared with other types of lasers, semiconductor lasers are widely used in optical communication, spectral analysis, optical information processing and other industries due to their wide wavelength range, simple manufacture, low cost, easy mass production, small size, light weight, and long life. It has a wide range of applications in basic and applied research such as technology, medical and life science research, and ...

AI Technical Summary

Problems solved by technology

[0003] Although semiconductor lasers have many advantages, they have obvious disadvantages in practical applications: the output frequency is easily affected by the ambient temperature and injection current, the output linewidth is usually around 100MHz, and the adjustability is relatively poor

Since there is only a single-layer temperature control, it is easily affected by the change of ambient temperature, which will also affect the frequency stability of the semiconductor laser output. At the same time, in the general temperature control circuit, the temperature detection is realized by a single thermistor. If a fault occurs, the actual temperature will not be given, resulting in failure of temperature control

In the prior art, the temperature adjustment of the light source body is often difficult to exert the best state of the light source body because the optimum temperature cannot be determined.

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