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femtosecond optical parametric amplifier

A technology of optical parameters and amplifiers, applied in the field of femtosecond lasers, can solve the problems of reducing the focusability of the amplified laser, the reduction of conversion efficiency, and the mismatch of wavefronts, and achieve the elimination of spatial chirp, high conversion efficiency, and improvement of conversion efficiency. Effect

Active Publication Date: 2015-09-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, even a small (such as 1°) non-collinear angle will cause serious wavefront mismatch, such as figure 2 shown
This will not only lead to a significant drop in conversion efficiency, but more seriously will introduce spatial chirp into the amplified signal laser pulse, reducing the focusability of the amplified laser

Method used

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Embodiment Construction

[0044] image 3 It is the optical path diagram of the femtosecond optical parametric amplifier of the present invention, and also the optical path diagram of the embodiment of the femtosecond optical parametric amplifier of the present invention. As can be seen from the figure, the femtosecond optical parametric amplifier of the present invention comprises:

[0045] Along the direction of the driving laser 1 are the third beam splitter 12, the second beam splitter 11 and the first beam splitter 10 at 45° to the direction of the driving laser 1;

[0046] On the reflected light path of the third beam splitter 12 are the fifth reflector 35, the sixth reflector 36, and the ninth reflector 38 at 45° to the optical path, the fifth reflector 35 and the sixth reflector 36 constitutes a third delay line 37;

[0047] On the reflective optical path of the second beam splitter 11 are the third reflector 29, the fourth reflector 30, the seventh reflector 32 and the third beam expander 33 ...

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Abstract

The invention discloses a femtosecond optical parameter amplifier. The femtosecond optical parameter amplifier is characterized in that birefringent crystals are inserted into stages of an optical parameter amplifier to separate signal light from idle light in time, and then the ultrashort time response of a pump laser pulse is utilized to selectively amplify only one path of laser, so that the pump light and the signal light in each stage of optical parameter amplification can work in the complete collinear condition, the spatial chirp is eliminated, and the conversion efficiency is improved. As shown in an experiment, the femtosecond optical parameter amplifier has the advantages of high conversion efficiency, no spatial chirp and strong focusing capacity.

Description

technical field [0001] The invention relates to a femtosecond laser, in particular to a femtosecond optical parameter amplifier. Background technique [0002] High peak power and wavelength tunable laser sources have important application value in science, environment, military and many other fields. However, limited by the limited types of laser gain media, current femtosecond laser sources are only distributed in several limited and isolated wavelength bands, such as 800 nm, 1030 nm, 1057 nm, 1064 nm, etc. Optical parametric amplification is currently the most effective frequency conversion technology for obtaining high peak power and wavelength tunable laser light sources. Its principle is to use the second-order nonlinear polarization effect of nonlinear crystals to transfer the energy of the incident pump light to In the signal light to be amplified, optical parametric amplification is performed on the signal light, and at the same time idle light of another frequency ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/105G02F1/35
Inventor 李闯宋立伟冷雨欣李儒新
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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