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Multi-way pulse compressor and using method thereof

A pulse compression and pulse technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of increasing the number and complexity of components, difficult and convenient adjustment, energy loss, etc. low loss effect

Inactive Publication Date: 2012-05-23
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional dispersion mirror compensation technology usually makes a dispersion compensation film system on a flat lens substrate. After multiple reflections, the spot usually becomes very large, and an additional beam reduction element is required, which brings additional energy loss and increases the The number and complexity of components in the system, and it is not easy to adjust easily

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  • Multi-way pulse compressor and using method thereof

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Embodiment Construction

[0033] The specific implementation scheme of obtaining the multi-pass pulse compressor is as follows: the mirror surface diameters of the first end mirror concave spherical reflector 1 and the second end mirror concave spherical reflector 2 are selected to be 50 mm, the radius of curvature of the concave spherical surface is 2 m, and the thickness D is is 6mm, and each concave spherical reflector is provided with a transparent groove with a width b of 6mm and a length a of 20mm. The concave spherical surfaces of 1 and 2 are coated with GT film system (a dispersion compensation film system), which consists of a group of high refractive index materials tantalum oxide (Ta 2 o 5 ), the low refractive index material is fused silica (SiO 2 ) consists of multiple layers of high and low refractive index films alternating with each other. The single reflection rate of the film system for light beams in the 1030-1050nm band is 99.99%, and the dispersion compensation amount of single re...

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Abstract

The invention discloses a multi-way pulse compressor and a using method thereof. The main body of the compressor comprises two end mirrors, the concave spherical surfaces of which are relatively coaxially placed; rotating rings are arranged on the end mirrors; and concave spherical reflectors are arranged in the rotating rings. Dispersion compensation film series are plated on the concave spherical surfaces of the concave spherical reflectors, and through grooves are processed on the reflectors. When the compressor is used, closed annular light spot tracks can be obtained on the concave spherical surfaces by setting and repeatedly adjusting the two end mirrors, and then discrete adjustment is implemented by rotating the compression of the rotating rings on the pulse. The compressor and the using method have the advantages that: the compressor has low loss, a compact structure and no spatial dispersion light path; the concave spherical surfaces can effectively counteract the beam broadening caused by the diffraction effect of beams so as to effectively overcome the defects of the conventional grating pair technology, prism pair technology and plane mirror-based dispersion mirror compensation technology; and the using and adjusting method is simple and convenient.

Description

technical field [0001] The invention relates to a multi-pass pulse compressor and its application method, which can realize the compression of chirped ultrashort pulses and obtain laser pulse output with shorter pulse width, and belongs to the technical field of ultrashort pulse lasers. Background technique [0002] Ultrashort pulse laser has the advantages of high peak power and narrow pulse width, so it has a wide range of applications in basic scientific research, cutting-edge defense technology, medicine and life science, and micro-nano processing. [0003] Usually, the ultrashort pulse directly output by the ultrashort pulse laser contains a certain positive chirp. In order to obtain a shorter pulse width, that is, a pulse with higher peak power, the positive chirp of the pulse needs to be compensated. The introduction of additional negative dispersion to the pulse can bring negative chirp, which can then compensate the positive chirp of the direct output pulse. The ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35
Inventor 王清月谢辰胡明列宋有建柴路
Owner TIANJIN UNIV
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