Fifth-order phase-sensitive detection of ultrafast polarization beats in cascade four-level system

• 来源期刊: 中国物理B（英文版）
• 关键词: ultrafast polarization beat nonlinear susceptibility phase-sensitive detection
• 年，卷（期）: 2008,（3）
• 页码范围: 978-987
• 页数: 10页
• 语种: 英文

摘要

We study the colour-locked twin-noisy-field correlation effects in the fifth-order nonlinear susceptibility of ultrafast polarization beats in a cascade four-level system. More importantly, the fifth-order phase-sensitive heterodyne detection of ultrafast polarization beats has been exploited. The fifth-order nonlinear optical response can be controlled and modified through the colour-locked correlation of twin noisy fields.Thus, this method with the phase dispersion information is a good way to measure the real and imaginary parts of the fifth-order nonlinear susceptibility.