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Broadband optical parametric chirped pulse amplification of

Author: LiuHuaGang
Tutor: ZhangRuoBing
School: Tianjin University
Course: Physical Electronics
Keywords: Nonlinear Optical Optical parametric chirped pulse amplification Gain Bandwidth Divergence Gaussian beam Ultrashort pulse laser
CLC: TN721
Type: Master's thesis
Year: 2007
Downloads: 214
Quote: 0
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Abstract


Born in the early 1990s of optical parametric chirped pulse amplification technique, because in the ultrashort pulse laser amplification unique advantages, once made, has aroused widespread concern. Single-pass gain high signal to noise ratio, high thermal effect of a small, high beam quality obtained many advantages of the optical parametric chirped pulse amplification technology to become super-short pulse laser to obtain one important way. Optical parametric chirped pulse amplifier to support the extremely short pulse laser pulse amplification, in the frequency domain optical parametric amplification requirements must be able to provide the appropriate gain bandwidth. In this paper, we have established an appropriate mathematical model of non-ideal monochromatic, with a divergence angle of the non-planar wave pumped optical parametric chirped pulse amplification system was simulated to study the divergence angle of the pump light non-monochromatic, angular dispersion optical parametric amplification factors such as the size of the gain and bandwidth. Analysis of a variety of different conditions affect the results, we also proposed to improve optical parametric chirped pulse amplification system gain bandwidth practical methods and suggestions for implementation supports a more narrow pulse, wider spectrum of parametric amplification provides theoretical guidance. Details and innovations are as follows: a. Recalls optical parametric amplification (OPA) and optical parametric chirped pulse amplification (OPCPA) technology, the basic theory, advantages and development status. Two. Depth study of several broadband phase-matching techniques, including non-collinear phase matching technology, signal light into angular dispersion phase matching of broadband technology, dual-beam-pumped optical parametric amplification. Three paper proposes a new improved gain-bandwidth optical parametric amplification method, which uses divergent beam-pumped optical parametric chirped pulse amplification system. Using spatial Fourier transform and fourth-order Runge-Kutta algorithms are simulated diffraction limit in case of non-Gaussian beam and a rectangular space spectrum as the pump light diverging beam gain curve. The results showed that, whether in the visible or near-infrared spectral region, with a divergent beam can significantly improve both optical parametric chirped pulse amplification system gain bandwidth. Divergence angle and select the appropriate pump intensity, you can get high gain, wide band signal light output. Four study of non-monochromatic pumped optical parametric chirped pulse amplification system, pumping light spectral width and angular dispersion of the gain bandwidth. We use the Fourier transform method, the pump light into different spectral components, replace the pump light is usually monochromatic or quasi-monochromatic light as a way to deal with the establishment of the three-wave optical parametric amplification coupled equations model, to study and analyze the spectral width of the pump light optical parametric chirped pulse amplification gain size and bandwidth. The results show that the use of broadband pumping light can also be significantly improved parametric amplification gain bandwidth.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Amplification technology,the amplifier > Amplification technology
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