中国物理B ›› 2002, Vol. 11 ›› Issue (8): 790-794.doi: 10.1088/1009-1963/11/8/307

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Influence of the randomly varying domain length of quasi-phase-matched crystals on quadrature squeezing performance

李永民, 吴迎瑞, 张宽收, 谢常德, 彭堃墀   

  1. State Key Laboratory of Quantum Optics and Quantum Optic Devices, Institute of Opto-Electronics Shanxi University, Taiyuan 030006, China
  • 收稿日期:2002-04-11 修回日期:2001-11-30 出版日期:2005-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 69938010), the National Fundamental Research Programme (Grant No 2001CB309304), the Natural Science Foundation of Shanxi Province, and the Shanxi Province Foundation for Retur

Influence of the randomly varying domain length of quasi-phase-matched crystals on quadrature squeezing performance

Li Yong-Min (李永民), Wu Ying-Rui (吴迎瑞), Zhang Kuan-Shou (张宽收), Xie Chang-De (谢常德), Peng Kun-Chi (彭堃墀)   

  1. State Key Laboratory of Quantum Optics and Quantum Optic Devices, Institute of Opto-Electronics Shanxi University, Taiyuan 030006, China
  • Received:2002-04-11 Revised:2001-11-30 Online:2005-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 69938010), the National Fundamental Research Programme (Grant No 2001CB309304), the Natural Science Foundation of Shanxi Province, and the Shanxi Province Foundation for Retur

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摘要： During the fabrication of quasi-phase-matched (QPM) devices, errors of periodic structure are usually inevitable. The errors result in the deviation of the actual periodic domain length from the theoretical value. In this paper, we numerically analyse the influence of errors on the quadrature squeezing performance of a degenerate optical parametric amplifier consisting of QPM devices. It is shown that errors significantly degrade the squeezing degree of the quadrature squeezed light. Due to the presence of the errors, the relative phase between the signal and the pump field for obtaining the maximum squeezing depends on the propagation distance of light in the crystal and the pump power.

Abstract: During the fabrication of quasi-phase-matched (QPM) devices, errors of periodic structure are usually inevitable. The errors result in the deviation of the actual periodic domain length from the theoretical value. In this paper, we numerically analyse the influence of errors on the quadrature squeezing performance of a degenerate optical parametric amplifier consisting of QPM devices. It is shown that errors significantly degrade the squeezing degree of the quadrature squeezed light. Due to the presence of the errors, the relative phase between the signal and the pump field for obtaining the maximum squeezing depends on the propagation distance of light in the crystal and the pump power.

Key words: quasi-phase-matched, errors of periodic structure, degenerate optical parametric amplification, quadrature squeezing

中图分类号:  (Frequency conversion; harmonic generation, including higher-order harmonic generation)

  • 42.65.Ky
42.50.Dv (Quantum state engineering and measurements)