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

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: quasi-phase-matched errors of periodic structure degenerate optical parametric ampli- fication quadrature squeezing
• 年，卷（期）: 2002,（8）
• 页码范围: 790-794
• 页数: 5页
• 分类号: O4
• 语种: 英文

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, wenumerically analyse the influence of errors on the quadrature squeezing performance of a degenerate optical parametricamplifier consisting of QPM devices. It is shown that errors significantly degrade the squeezing degree of the quadraturesqueezed light. Due to the presence of the errors, the relative phase between the signal and the pump field for obtainingthe maximum squeezing depends on the propagation distance of light in the crystal and the pump power.