Abstract

We present a new technique for radio frequency (RF) phase-shift amplification based on RF interferometry and demonstrate it in an optical system. A striking feature of this amplifier is that the input phase noise is not amplified together with the input phase signal, so the phase sensitivity improves with higher phase amplification. We also predict that in the case of correlated amplitude noise, the sensitivity is not affected by the amplitude noise. With 600 MHz of modulated light and a phase amplification of 100, we demonstrate a phase resolution of 0.2 mrad, giving a distance resolution of 8 μm. We postulate that nanometric distance resolution can be achieved with sub-gigahertz modulation.

© 2015 Optical Society of America

Phase-shift-amplified interferometry

Moshe Ben Ayun, Egor Liokumovitch, Daniel Gotliv, and Shmuel Sternklar
Opt. Lett. 43(10) 2402-2405 (2018)

Photonic radio-frequency dissemination via optical fiber with high-phase stability

Xiaocheng Wang, Zhangweiyi Liu, Siwei Wang, Dongning Sun, Yi Dong, and Weisheng Hu
Opt. Lett. 40(11) 2618-2621 (2015)

Optical injection locking-based amplification in phase-coherent transfer of optical frequencies

Joonyoung Kim, Harald Schnatz, David S. Wu, Giuseppe Marra, David J. Richardson, and Radan Slavík
Opt. Lett. 40(18) 4198-4201 (2015)

Hybrid radio-intermediate-frequency oscillator with photonic-delay-matched frequency conversion pair

Yitang Dai, Ruixin Wang, Feifei Yin, Jian Dai, Yue Zhou, Jianqiang Li, and Kun Xu
Opt. Lett. 40(12) 2894-2897 (2015)

Femtometer-resolved wavelength monitor based on photodiode optoelectronic chromatic dispersion with RF phase-shift amplification

Egor Liokumovitch, Ziv Glasser, and Shmuel Sternklar
Opt. Lett. 47(11) 2622-2625 (2022)