A high power femtosecond chirped amplified laser with fiber-optic conduction output

Abstract

The invention discloses a high-power femtosecond chirped amplified laser with optical fiber conduction output, comprises successively connected seed sources (1), A pulse stretcher (2), Pulse Amplifier(3), hollow-core photonic crystal fiber (5) and spatial optical coupler (4), the spatial optical coupler is arranged between the output end of the pulse amplifier and the hollow-core photonic crystalfiber, The hollow-core photonic crystal fiber (5) is used for pulse compression and transmission, the tail part thereof is provided with a conductive tail fiber which can be moved at will, and a plurality of photonic crystal structures used for pulse compression are arranged inside the hollow-core photonic crystal fiber (5) for compressing the amplified pulse back to femtosecond pulse. The invention relates to a high-power femtosecond chirped amplified laser with optical fiber conduction output, wherein the hollow-core photonic crystal fiber can simultaneously realize compression and conduction, and solves the problems existing in the traditional spatial compressor.

Description

technical field [0001] The invention belongs to the technical field of femtosecond amplified lasers, and more specifically relates to a high-power femtosecond chirped amplified laser output through optical fiber transmission. Background technique [0002] High-power femtosecond optical pulses are generally realized through the structure of oscillator plus amplifier (MOPA). Chirp amplification is a common amplification method to achieve high power and high energy femtosecond pulses, especially for fiber amplifiers. Chirped pulse amplification technology is a classic technology for obtaining ultrashort intense laser pulses. The chirped amplifier is composed of a seed source, a stretcher, an amplifier and a compressor. [0003] The chirped amplifier first uses a pulse stretcher to introduce a certain amount of chirp to the femtosecond seed pulse to widen the pulse. After amplification, a compressor is used to introduce a chirp amount opposite to that of the stretcher to restor...

AI Technical Summary

Problems solved by technology

Commonly used compressors include prism pairs, chirped mirrors, and diffraction grating pairs. The prism pair has a simple structure but small bandwidth and large high-order dispersion; the chirped mirror has a small amount of dispersion, and the diffraction grating pair mainly obtains large by increasing the grating spacing. The amount of dispersion requires a large volume of space

Prism pairs, chirped mirrors, and diffraction grating pairs are all space compressors. High-power femtosecond chirped amplifier lasers usually use space light compressors for pulse compression. The output light is in the form of space light output. In order to ensure the quality of the output light, The main part of the laser and the spatial optical path need to work in a stable environment, so they cannot be moved; in addition, the main disadvantage of the spatial compressor is that it is bulky, and the output optical path to the application end needs adjustment and maintenance

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