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 regeneration and amplification device based on a 2 * 3 optical switch. The device comprises the 2 * 3 optical switch, an all-fiber regeneration and amplification resonant cavity composed of the 2 * 3 optical switch, an ultrashort pulse laser seed source, a pulse broadening device, a pulse compression device and a detection and feedback controldevice. The 2 * 3 optical switch selectively inputs the pulse of the regenerative amplification resonant cavity and outputs the pulse from different ports. The input pulse of the all-fiber regenerative amplification resonant cavity is circularly amplified for multiple times in the resonant cavity, and the locking of the repetition frequency of the ultrashort pulse laser seed source and the all-fiber regenerative amplification resonant cavity and the synchronization between a 2 * 3 optical switch control signal and the ultrashort pulse laser seed source are ensured by using a detection and feedback control device. The high-energy pulse regeneration and amplification device can effectively replace a multi-stage amplification and frequency reduction structure in traditional high-power optical fiber laser amplification, the cost of high-energy ultrafast laser is reduced, and research and application of the ultrafast laser can be promoted.

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.

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