An all-fiber high-energy pulse regeneration and amplification device and method based on 2×3 optical switch

Abstract

The invention discloses an all-fiber high-energy pulse regenerative amplification device based on a 2×3 optical switch. , pulse stretching device, pulse compression device, detection and feedback control device; 2×3 optical switches will select the pulses input to the regenerative amplifying resonant cavity and output them from different ports; the input pulses of the all-fiber regenerative amplifying resonant cavity circulate multiple times in the resonant cavity Amplification, using the detection and feedback control device to ensure the locking of the repetition frequency of the ultrashort pulse laser seed source and the all-fiber regenerative amplification resonator, and the synchronization between the 2×3 optical switch control signal and the ultrashort pulse laser seed source. The high-energy pulse regenerative amplification device can effectively replace the multi-stage amplification and frequency reduction structure in traditional high-power fiber laser amplification, reduce the cost of high-energy ultrafast lasers, and promote the research and application of ultrafast lasers.

Description

technical field [0001] The invention relates to the technical field of optical fiber laser amplification, in particular to a 2×3 optical switch realized by a large mode field optical fiber, and an all-fiber high-energy pulse regeneration amplification device and method realized by using the same. Background technique [0002] Ultra-short laser pulses have extremely narrow time scale, ultra-wide spectral width and ultra-high peak power, especially for high-energy femtosecond laser pulses, in high-precision laser processing, biomedicine, high-precision measurement, ultra-fast diagnosis, etc. fields are widely used. However, under normal circumstances, the output power and pulse energy of femtosecond laser oscillators are limited, and it is necessary to use an amplification device to increase the pulse energy. The amplification of femtosecond laser is limited by the nonlinear effect of light, and relies on chirped pulse amplification technology, which first uses a dispersive e...

AI Technical Summary

Problems solved by technology

Another technical limitation of the all-fiber regenerative amplifier lies in the input and output components used. The commonly used electro-optic or acousto-optic 2×2 optical switches not only have a relatively large insertion loss, but also it is difficult to directly obtain a large signal-to-noise ratio.

Images