Device for maintaining stability of polarization direction and energy of optical signals with low repetition frequency and short pulse

Abstract

The invention relates to a device for maintaining the stability of the polarization direction and energy of optical signals with low repetition frequency and short pulse. The device comprises a continuous optical fiber laser, an optical pulse generator, a polarization control unit, an analyzer, an optical fiber beam splitter, a feedback unit, a digital controller and a signal synchronizer, wherein the polarization control unit comprises a polarization control module and a driving circuit thereof; the driving circuit supplies driving voltage to the polarization control module; and the feedback unit successively comprises a photoelectric detector, an integrating circuit, a high-speed electric amplifier and a high-speed acquisition card. The device of the invention can maintain the stability of the polarization direction and output energy of the optical signals with low repetition frequency and short pulse, and has simple structure, ensures accurate control, is easy for system integration and the like.

Description

technical field [0001] The invention relates to the polarization state and output energy of an optical pulse signal, in particular to a device for maintaining the polarization direction and energy stability of a low repetition frequency short pulse optical signal. The collection of pulsed optical signal energy, combined with feedback control technology, keeps the polarization direction and output energy of low repetition rate short pulsed optical signal stable. Background technique [0002] In the low repetition rate short pulse high power fiber laser system, due to the needs of physical experiments, it is required that the polarization direction of the final output optical pulse signal of the system be kept stable and the output energy be kept at the maximum value. By using a polarizer at the output end of the high-power optical fiber system, the polarization direction of the optical pulse signal finally output by the system can be kept in the direction of the polarizer. H...

AI Technical Summary

Problems solved by technology

However, because the optical signal transmitted in the low repetition frequency short pulse high power fiber laser system is a low repetition frequency optical pulse signal, which is characterized by narrow pulse width and low repetition frequency, it is difficult to collect energy, and it is difficult to compensate the input to the detector in real time. The slow drift of the polarization state of the optical pulse signal before the polarizer, so it is difficult to keep the energy of the optical pulse output by the analyzer stable

Images