Modified j1…j4method for linear readout of dynamic phase changes in a fiber-optic homodyne interferometer

Wei Jin, Li Ming Zhang, Deepak Uttamchandani, Brian Culshaw

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)


Fiber-optic interferometers have been studied extensively for sensing applications. Recently a technique described as the J1…J4technique was reported for the linear measurement of dynamic phase changes in a fiber interferometer that requires no phase bias and for which the measurement is independent of random phase fluctuations. However, the implementation of the J1…J4technique is limited because only the magnitude of the J1…J4Bessel components can be measured on a spectrum analyzer without information available on the sign of the Bessel function. Here a modified signal-processing technique that overcomes the limitations mentioned above is described.
Original languageEnglish
Pages (from-to)4496-4499
Number of pages4
JournalApplied Optics
Issue number31
Publication statusPublished - 1 Nov 1991
Externally publishedYes


  • Fiber-optic interferometers
  • Fiber-optic sensors
  • Laser interferometers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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