Two-stage thermostatically controlled semiconductor laser

Abstract

The invention provides a dual-stage thermostatical control semiconductor laser which comprises a semiconductor laser, a primary thermostatical control circuit used for controlling the temperature of the semiconductor laser, a thermostatical control cavity and a secondary thermostatical control device, wherein the thermostatical control cavity is composed of an insulating cavity and a heat-conducting block arranged at the opening of the insulating cavity; the secondary thermostatical control device comprises a secondary thermostatical control circuit, a temperature sensor (TS) and a thermoelectric cooler (TEC); the semiconductor laser, the primary thermostatical control circuit and the TS are arranged in the thermostatical control cavity; one side of the TEC is arranged outside the heat-conducting block; and the secondary thermostatical control circuit is respectively connected with the TS and the TEC. The dual-stage thermostatical control semiconductor laser has the advantages of small size, low power consumption, wide temperature applicability, reliable performance and convenience in use.

Description

technical field [0001] The invention relates to a constant temperature control device, in particular to a two-stage constant temperature control semiconductor laser. Background technique [0002] Semiconductor lasers have the characteristics of good monochromaticity, good coherence, good directionality, small size, light weight, high conversion efficiency, and low power consumption. They have been used more and more in the fields of national defense, communications, and industry. Tunable semiconductor lasers have been widely used because of their wavelength tunable characteristics. However, the laser has very strict requirements on working conditions, and changes in temperature will affect its emission wavelength, output power and other parameters, which will seriously affect the test results. influences. [0003] (1) The influence of temperature on wavelength. When the operating current of a semiconductor laser is constant, the laser wavelength will increase by 0.1~0.3nm ...

AI Technical Summary

Problems solved by technology

This control method, in the case of a wide temperature range of the laser working environment, the control effect is very unsatisfactory

And another control method is to use the laser diode temperature controller sold on the market to control. Although this method has better effect, it is bulky, expensive and cost-effective.

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