Abstract

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.

© 2018 Optical Society of America

Heterodyne phase-shift-amplified interferometry with improved shot-noise-limited sensitivity and immunity to RIN

Egor Liokumovitch and Shmuel Sternklar
Opt. Lett. 45(7) 1950-1953 (2020)

Photonic radio frequency phase-shift amplification by radio frequency interferometry

Moshe Ben Ayun, Arye Schwarzbaum, Seva Rosenberg, Monika Pinchas, and Shmuel Sternklar
Opt. Lett. 40(21) 4863-4866 (2015)

Simultaneous 2-step phase-shifting interferometry with a full-band interferometric signal being recovered

Yi Wang, Shengqi Cao, Bingbo Li, Liyun Zhong, and Xiaoxu Lu
Opt. Lett. 43(19) 4807-4810 (2018)

Fast and accurate wavefront reconstruction in two-frame phase-shifting interferometry with unknown phase step

Zhongtao Cheng and Dong Liu
Opt. Lett. 43(13) 3033-3036 (2018)

Simultaneous imaging of flow and sound using high-speed parallel phase-shifting interferometry

Kenji Ishikawa, Risako Tanigawa, Kohei Yatabe, Yasuhiro Oikawa, Takashi Onuma, and Hayato Niwa
Opt. Lett. 43(5) 991-994 (2018)