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A method for improving the performance of broadband opcpa by full-stereo spatial phase matching

A technology of phase matching and three-dimensional space, applied in nonlinear optics, instruments, optics, etc., can solve problems such as inability to solve OPCPA phase matching angle, low frequency conversion efficiency, etc.

Active Publication Date: 2022-08-09
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI +1
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Problems solved by technology

[0005] The invention patent "Calcium Oxyborate Rare Earth Salt Laser Frequency Doubling Crystal with Special Cut Angle [Patent No.: 99112260.7]" describes the special angle of YCOB crystal in three-dimensional space (θ=65.9°±5°, φ=36.5°±5° Or = 66.3°±5°, φ=143.5°±5°), the optimal frequency multiplication phase matching was realized, which solved the problem of low frequency multiplication conversion efficiency at that time
However, the three-dimensional space angle given by this patent is only applicable to the frequency doubling angle of YCOB crystal at a single wavelength (1064nm) to 532nm, and cannot solve the problem of solving the optimal phase matching angle of OPCPA in the three-dimensional space of biaxial crystals

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  • A method for improving the performance of broadband opcpa by full-stereo spatial phase matching
  • A method for improving the performance of broadband opcpa by full-stereo spatial phase matching

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Embodiment Construction

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The invention breaks through the limitation of the phase-matched broadband OPCPA of the traditional nonlinear crystal in the main plane, improves the output performance of the broadband OPCPA, and provides a method for improving the performance of the broadband OPCPA by full three-dimensional spatial phase matching, and the specific steps are as follows:

[0034] Step S1, based on the YCOB crystal, select the angle α between the pump light and the signal light inside the crystal, and the selection range is generally 0°≤α≤5°;

[0035] Step S2, according to the pump light wavelength λ p =527nm, the center wavelength λ of the signal light s0 =800nm ​​and the center wavelength of idler light λ i0 =1603nm satisfies the condition of wave vector matching in nonlinear crystal YCOB: and satisfy 1 / λ p =1 / λ s0 +1 / λ i0 , the pump light λ can ...

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Abstract

The invention relates to a method for improving the performance of broadband OPCPA by full-stereo space phase matching. The ultra-wide gain bandwidth and high effective nonlinear coefficient realize the optimized phase matching and OPCPA process. At the same time, this method also expands the band range supported by nonlinear crystal OPCPA. The invention is suitable for high repetition frequency OPCPA laser device, and also suitable for main amplifier of several petawatt laser device.

Description

technical field [0001] The invention relates to the technical field of ultrashort pulses, in particular to a method for improving the performance of broadband OPCPA by full-stereo spatial phase matching. Background technique [0002] Nonlinear Optical Parametric Chirped Pulse Amplification (OPCPA) technology is an advanced technology to achieve petawatt (PW: 10 15 A major technical approach for W) level and even hundreds of PW level amplification. With the development of laser technology and laser material technology, the output power of ultra-intense and ultra-short lasers is getting higher and higher, which can provide more extreme conditions for laser physics experiments. [0003] Since OPCPA technology does not produce parasitic oscillation effects during the amplification process, and has the properties of high signal-to-noise ratio, low system B integral, wide gain bandwidth, and high one-way gain, large-diameter high-energy OPCPA is expected to break through 100 PW o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35G02F1/39
CPCG02F1/3544G02F1/39
Inventor 陈丽明於亮红梁晓燕李进峰王傲天徐至展
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI