Laser power detection device and measurement method thereof

Abstract

The invention discloses a laser power detection device and a measurement method thereof. The laser power detection device comprises a base, an optical element and an optical fiber microstructure spectrum test system. The optical element comprises a plano-convex cylindrical lens and an optical fiber microstructure. The base comprises a mirror bracket for fixing the plano-convex cylindrical lens, an optical fiber clamp for fixing the optical fiber, a three-dimensional manual platform for adjusting and controlling the position and angle of the optical fiber, and a substrate for connecting the mirror bracket, the optical fiber clamp and the three-dimensional manual platform. The optical fiber microstructure spectrum testing system comprises a spectrum analyzer and a signal light source. According to the measuring method, the plano-convex cylindrical lens is used for focusing a laser beam to the optical fiber microstructure, the effective refractive index of the Bragg grating can be changed through laser irradiation, the center wavelength of the Bragg grating is made to drift, and the power value of the laser can be obtained by observing the drift distance of the center wavelength. Compared with a photoelectric optical power detection device, the device has the advantages of being capable of measuring the laser power of any wavelength, high in measurement precision, capable of achieving micro-area detection and the like.

Description

technical field [0001] The invention relates to the field of photoelectric detection, in particular to a laser power detection device and a measurement method thereof. Background technique [0002] Lasers have great application prospects in scientific development and technical applications such as information optoelectronic technology, laser medical treatment and photon biology, laser processing, laser detection and measurement, laser holography, and laser spectroscopy. Precise measurement of laser power is crucial in laser technology applications. The traditional laser power detection device is realized by photoelectric or photothermoelectric conversion system, which has a complex structure, is selective to the laser wavelength, and has low measurement accuracy. Therefore, it is of great significance to design and research a power detection device with simple structure, small size, high precision, and the ability to measure laser power of any wavelength. [0003] Fiber Br...

AI Technical Summary

Problems solved by technology

The traditional laser power detection device is realized by photoelectric or photothermoelectric conversion system, the structure is complex, and it is selective to the laser wavelength, and the measurement accuracy is low

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