Laser seed source system based on single polarization transmission fiber with high perturbation resistance

Abstract

The invention relates to a high-perturbation-resistance laser seed source system based on single-polarization transmission fibers. The high-perturbation-resistance laser seed source system based on single-polarization transmission fibers comprises a narrow-line-width continuous fiber laser, a single-polarization acousto-optical chopper, a single-polarization fiber amplifier, a phase modulator, a single-polarization amplitude modulator, a clock frequency source, an arbitrary waveform generator and a digital delay generator, wherein the digital delay generator successively triggers the single-polarization acousto-optical chopper and the arbitrary waveform generator; and a phase modulating signal is generated by the clock frequency source, is loaded on the phase modulator, simultaneously is inputted to the arbitrary waveform generator and is used as a reference clock, so that phase locking is realized, and finally laser pulse with arbitrary pulse width is obtained. By the high-perturbation-resistance laser seed source system based on single-polarization transmission fibers, amplitude-frequency modulating caused by phase modulating spectrum broadening can be inhibited effectively, influences of the laser seed source system to laser pulse amplitude-frequency modulating and influences of external environments (including temperature and stress) are reduced, and quality of laser pulses output by a laser seed source is improved.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a high perturbation-resistant laser seed source system based on a single polarization transmission fiber. Background technique [0002] With the development of laser technology, the output capability of high-power laser has been continuously improved, and it has also been widely used in various fields such as laser processing, ultrafast spectroscopy, medicine, and high-energy physics. Especially in the field of high-energy physics, high-power lasers have become an essential means for studying the interaction between ultra-intense and ultra-short lasers and matter. Laser inertial confinement nuclear fusion is one of the typical applications. In the process of realizing controllable nuclear fusion, the nanosecond high-power laser system is used as the key ignition pulse. It is necessary to design a laser with corresponding characteristics for the physical process of the target pelle...

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Problems solved by technology

But at the same time, the polarization-maintaining fiber has a large polarization mode dispersion, which makes it difficult to suppress the amplitude-frequency modulation in the nanosecond seed source system based on the polarization-maintaining fiber

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