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

A regenerative amplification and pulse regeneration technology, which is applied in the direction of lasers, laser components, and the structure/shape of active media, can solve problems such as difficult frequency reduction and large insertion loss, and achieve reduced nonlinear effects, compact structure design, The effect of improving the signal-to-noise ratio

Active Publication Date: 2021-07-20
ZHEJIANG UNIV
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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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  • An all-fiber high-energy pulse regeneration and amplification device and method based on 2×3 optical switch
  • An all-fiber high-energy pulse regeneration and amplification device and method based on 2×3 optical switch
  • An all-fiber high-energy pulse regeneration and amplification device and method based on 2×3 optical switch

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[0043] Such as figure 1 As shown in (a), a 2×3 optical switch provided by the present invention and an all-fiber high-energy pulse regeneration amplifying device realized by applying it include an ultrashort pulse laser seed source 101, a pulse stretching device 102 and The all-fiber regenerative amplification resonant cavity 103 , the output laser of the all-fiber regenerative amplifying resonant cavity 103 is spatially collimated output, and the output laser enters the pulse compression device 105 . It is also possible not to include the pulse stretching device 102, and directly use the optical fiber to input the seed source pulse to the all-fiber regenerative amplification resonator 103, such as figure 1 (b) shown.

[0044] The ultrashort pulse laser seed source 101 can use a typical mode-locked fiber laser, and a cavity length adjuster based on a PZT crystal is placed on the fiber in the resonant cavity. The 5% energy of the output signal of the ultrashort pulse laser se...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/0941H01S3/127H01S3/00
CPCH01S3/0057H01S3/06716H01S3/06754H01S3/0941H01S3/127
Inventor 崔玉栋刘雪明
Owner ZHEJIANG UNIV
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