We present a new technique for improving the sensitivity of an interferometer, phase-shift-amplified interferometry (PAI), which is based on two embedded interferometers. The internal interferometer, which is biased in anti-phase, amplifies the phase shift; the external interferometer converts this into an amplified intensity shift. PAI can improve the sensitivity of standard interferometers by an order of magnitude or more. The theory of PAI, including its enhanced immunity to relative intensity noise, phase noise, and other post-detection noise and distortion components, is presented. We experimentally demonstrate a phase-shift amplification factor of 11.

中文翻译：

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相移放大干涉术

我们提出了一种用于提高干涉仪灵敏度的新技术，即基于两个嵌入式干涉仪的相移放大干涉仪（PAI）。相位偏置的内部干涉仪会放大相移。外部干涉仪将其转换为放大的强度偏移。PAI可以将标准干涉仪的灵敏度提高一个数量级或更多。提出了PAI的理论，包括增强的抗相对强度噪声，相位噪声以及其他检测后噪声和失真分量的能力。我们实验证明相移放大因子为11。