Laser detector and corresponding laser power meter

Abstract

The invention discloses a laser detector and a corresponding laser power meter. The laser detector comprises a shell, a thermopile probe, a calibration circuit and a voltage amplification circuit arearranged in the shell. The thermopile probe comprises a light absorber and a thermopile arranged on the surface of the light absorber. According to the laser detector, even if the surface of the lightabsorber is damaged, the laser absorption ratio is not influenced, and the problem that strong optical reflection is generated once the metal matrix is exposed to irradiation laser is solved. Moreover, the thermopile is directly arranged on the surface of the light absorber, so that contact is more reliable. The heat conduction is faster, and reaction is more sensitive. In addition, the laser detector is simple in preparation process, low in cost, reliable in performance and long in service life.

Description

technical field [0001] The invention relates to a laser detector and a corresponding laser power meter, belonging to the technical field of laser measurement. Background technique [0002] At present, lasers are widely used in communication, medical treatment, industrial manufacturing and other fields. In the process of laser development, production and application, it is an essential step to measure and calibrate the power of the laser. [0003] In the prior art, a laser power meter is usually used to test the power of a continuous laser or the average power of a pulsed laser in a certain period of time. A laser power meter generally consists of a laser detector and a display device. According to different measurement principles, laser detectors mainly include two types: photoelectric laser detectors and pyroelectric laser detectors. Among them, the photoelectric laser detector uses the photoelectric effect of semiconductors to achieve power measurement. When the laser i...

AI Technical Summary

Problems solved by technology

Under the impact of high average power, high peak power or high-energy light pulse on the laser absorption surface of the pyroelectric laser detector, the optical absorption coating 101 will often burn, volatilize, fall off, and be damaged, which will lead to a decrease in the laser absorption rate and cause measurement inaccurate

On the other hand, there are also problems of thermal expansion and contraction and poor contact between the insulating layer 102 and the thermopile 103 of the pyroelectric laser detector, which are prone to failure.

Therefore, this existing pyroelectric laser detector has a short life, a high failure rate, and requires frequent replacement and calibration

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