Optical interference light source device of current-temperature control semiconductor laser and measurement system thereof

Abstract

The invention discloses an optical interference light source device of a current-temperature control semiconductor laser. The optical interference light source device comprises a heating panel, an annular semiconductor cooling piece, a semiconductor laser, a PCB, a head sensor and a fixed plate, the centers of the two sides of the PCB are respectively provided with a first circular windowing copper area and a second circular windowing copper area, and the first circular windowing copper area is in contact with the second circular windowing copper area through a via hole; the lower end of the housing of the semiconductor laser is connected with the first circular windowing copper area through heat conducting silicone grease, and the cooling surface of the annular semiconductor cooling pieceis connected with the first circular windowing copper area through the heat conducting silicone grease; the heating surface of the annular semiconductor cooling piece is connected with the heating panel through the heat conducting silicone grease; the heat sensor is arranged on the first circular windowing copper area to detect the temperature of the first circular windowing copper area. The present invention further discloses a measurement system. The structure is simple, the thermal conductivity is good, the temperature control precision is high and the output wavelength of the laser is stable.

Description

technical field [0001] The invention relates to an optical interference light source device and a measurement system thereof, in particular to an optical interference light source device of a current-temperature-controlled semiconductor laser and a laser wave number scanning interferometry system composed of the same. Background technique [0002] Semiconductor lasers are also called diode lasers (LD). Compared with traditional lamp-pumped lasers, semiconductor lasers have many advantages such as small size, high efficiency, light weight, long life, and good coherence. Semiconductor diode lasers are used in optical measurement , laser communication, optical storage, laser printing, and radar have been widely used, and are currently one of the most widely used optoelectronic devices. [0003] Since the semiconductor laser has significant temperature characteristics, it is a device that is very sensitive to temperature, and its optical power and output wavelength vary greatly ...

AI Technical Summary

Problems solved by technology

However, due to the insulation between the semiconductor laser and the heat sink and the large thermal inertia of the heat sink, the heat transfer efficiency is low and the effect is poor, so that it is impossible to ensure accurate and fast control of the operating temperature of the semiconductor laser, which in turn leads to a problem in tuning the wave number. Unstable factors appear (such as the generation of mode jumps)

Images