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Backmixing non-conjugated grating Martinez pulse stretcher-compressor

A technology of reverse mixing and stretching, which is applied in nonlinear optics, instruments, optics, etc., can solve problems such as impossible dispersion compensation, and achieve the effect of reducing distortion and low material dispersion

Inactive Publication Date: 2005-03-16
TIANJIN UNIV
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Problems solved by technology

Therefore, in the actual existence of material dispersion in the amplifier and aberrations in the stretcher using spherical mirrors, it is inevitable that this kind of stretcher-compressor system cannot achieve complete dispersion compensation.

Method used

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  • Backmixing non-conjugated grating Martinez pulse stretcher-compressor

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Embodiment Construction

[0014] The structure of the inverse hybrid non-conjugated grating pair Martinez type pulse stretcher-compressor is shown in the accompanying drawing. The stretcher is composed of a concave spherical reflector 1-1, a grating 1-2 and plane reflectors 1-3, 1-4, 1-5, 1-6. The pulse stretching process of the stretcher is as follows: after the incident pulse is reflected by the plane mirrors 1-6 and 1-5 in turn, it is incident on the grating 1-2 at a certain angle; the spectrum expanded by the grating diffraction reaches the concave spherical mirror 1-1, And is reflected on the plane reflector 1-3; Then it is reflected back to the concave spherical reflector 1-1; On the mirror 1-4; the plane mirror 1-4 returns the pulse in reverse to the original path, is stretched again, and is output along the incident direction. Since the plane mirrors 1-4 are slightly tilted in the vertical direction, the incident and outgoing pulses can be separated in space.

[0015] The compressor is compos...

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Abstract

This invention discloses a backmixing non-conjugated grating pair Martinez impulse stretcher and compressor applied in the compensation impulse enlarger material with low color dispersion, which belongs to the structure technique of stretcher and compressor in the femtosecond enlarge system. The said Martinez stretcher comprises concave spherical reflecting lens, plane reflecting lens and grating. The said compressor comprises plane reflecting lens, inner right angle reflecting lens and grating, which is characterized by the following: the grating fringe density of the stretcher is larger than that of the compressor. The advantages of this invention are the following: backmixing non-conjugated grating pair Martinez impulse stretcher and compressor are applied in the multiple-pass enlarger with material of low dispersion and can effectively compensate the material dispersion in the enlarger and reduces the deformation of femtosecond impulse.

Description

technical field [0001] The invention relates to an inverse hybrid non-conjugated grating pair Martinez-type pulse stretcher-compressor system suitable for compensating lower material dispersion (multipass amplifier) ​​in chirped pulse amplifiers, belonging to femtosecond laser amplification system stretching Structural techniques of compressors and compressors. Background technique [0002] The stretcher and compressor in the chirped pulse amplification system are the core of the amplification system, and they must be used in pairs. The function of the stretcher is to stretch the femtosecond seed pulse output by the oscillator to the order of picoseconds or even nanoseconds; the function of the compressor is to compress the amplified high-power stretched pulse back to the width of the incident pulse. The principle behind compressing a chirped amplified pulse back to the same magnitude as the incident pulse is that if the dispersion of the additio...

Claims

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Application Information

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IPC IPC(8): G02F1/35
Inventor 张志刚王清月柴路孙大睿刘永军
Owner TIANJIN UNIV
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