Arbitrary phase-locking in Mach–Zehnder interferometer

  • Shuhe Wu
  • , Wenfeng Huang
  • , Peiyu Yang
  • , Shuqi Liu
  • , Liqing Chen*
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Based on the demand for the stability of the Mach–Zehnder optical interferometer, we proposed and designed a system that can achieve fast and precise locking at any phase point in one period. The locking system is simple and is easy to operate. The core elements are an electro-optic modulator (EOM), which can generate different phase shift on the vertically polarized light and horizontally polarized light, and a PID feedback. The experimental results show that for the MZ interferometer, the system can achieve fast, accurate and long-term locking at any phase point. The accuracy of the phase lock can be controlled within 1.05°or 0.0029λ with the intensity of the interference beams of 0.335 mW. This locking technology can be applied in the field of precision measurement in the future.

Original languageEnglish
Pages (from-to)148-151
Number of pages4
JournalOptics Communications
Volume442
DOIs
StatePublished - 1 Jul 2019
Externally publishedYes

Keywords

  • Arbitrary phase locking
  • Electro-optic modulator
  • Mach–Zehnder interferometer
  • PID feedback
  • Precision measurement

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