Photonic radio frequency phase-shift amplification by radio frequency interferometry

Moshe Ben Ayun, Arye Schwarzbaum, Seva Rosenberg, Monika Pinchas, Shmuel Sternklar

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


We present a new technique for radio frequency (RF) phaseshift 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.

Original languageEnglish
Pages (from-to)4863-4866
Number of pages4
JournalOptics Letters
Issue number21
StatePublished - 2015


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