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Method for improving broadband OPCPA performance through full-stereoscopic space phase matching

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

Active Publication Date: 2021-05-28
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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  • Method for improving broadband OPCPA performance through full-stereoscopic space phase matching
  • Method for improving broadband OPCPA performance through full-stereoscopic space phase matching

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation examples.

[0033] The present invention breaks through the limitations of traditional nonlinear crystal phase matching broadband OPCPA on the main plane, improves the output performance of broadband OPCPA, and provides a method for improving the performance of broadband OPCPA by phase matching in full three-dimensional space. 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, center wavelength λ of signal light s0 =800nm ​​and center wavelength of idler light λ i0 =1603nm satisfies the condition of wave vector matching in the nonlinear crystal YCOB: and satisfy 1 / λ p =1 / λ s0 +1 / λ i0 , the pump light λ can be cal...

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Abstract

The invention relates to a method for improving broadband OPCPA performance through full-stereoscopic space phase matching, which is characterized in that an optimal phase matching angle is solved in a double-axis nonlinear crystal full-stereoscopic space to obtain a nonlinear optical parametric chirped pulse amplification (OPCPA) ultra-wide gain bandwidth and a relatively high effective nonlinear coefficient; the optimal phase matching and OPCPA process is realized, and meanwhile, the method also expands the waveband range supported by the nonlinear crystal OPCPA. The invention is suitable for a high repetition frequency OPCPA laser device, and is also suitable for a main amplifier of a multi-beat watt 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 wideband OPCPA by full-stereo spatial phase matching. Background technique [0002] Nonlinear Optical Parametric Chirped Pulse Amplification (OPCPA) technology is to achieve petawatt (PW: 10 15 W) level or even hundreds of PW level amplification is a major technical approach. 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 high signal-to-noise ratio, low system B integral, wide gain bandwidth, and high one-way gain, large-aperture high-energy OPCPA is expected to break through hundreds of PW or even exawatts ( EW: 10 18 W) Zoo...

Claims

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Application Information

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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