An integrated bgo crystal optical waveguide closed-loop electric field detection system with reciprocal optical path

Abstract

The invention provides an integrated BGO crystal optical waveguide closed-loop electric field detection system with reciprocal optical path, including: SLD broadband light source, circulator, polarizer, phase modulator, BGO integrated optical waveguide field sensor, photoelectric detector and signal processing module , BGO integrated optical waveguide field sensor is a kind of optical waveguide structure with optical path reciprocity written on the symmetrical BGO crystal by femtosecond laser, so that the orthogonal polarization mode has gone through the same length of optical path after passing through the two crystals , so the phase difference produced by the natural birefringence is successfully cancelled. The invention eliminates the phase error caused by natural birefringence, temperature change and gas pressure, and can further reduce the nonlinear error of the system and increase the dynamic range of the system by introducing the feedback phase difference.

Description

technical field [0001] The invention belongs to the technical field of electric field detection, and in particular relates to an integrated BGO crystal optical waveguide closed-loop electric field detection system with reciprocal optical paths. Background technique [0002] Electric field measurement is of great significance in research fields such as high voltage, high power pulse, high energy physics, and electrostatic protection. [0003] Traditional active electric field sensors have the disadvantages of large volume, easy drift, and large electromagnetic interference. With the development of photoelectric technology, the research of optical electric field sensor has been paid attention to by people. Compared with the traditional active electric field sensor, it has the advantages of small size, high precision, high sensitivity, large linear dynamic range and wide frequency response. Sensors have broad application prospects and research value. [0004] Most of the exis...

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Problems solved by technology

This type of method usually reduces the drift of the operating point by phase modulation or tuning the laser wavelength to ensure that the operating point is in the linear region, but because the tunable optical device is also affected by environmental factors, the phase error caused by environmental factors still cannot be achieved. completely eliminated

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