Optical low-coherence reflectometry based on long-period grating Mach-Zehnder interferometers

Aping Zhang, Zu G. Guan, Sailing He

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


The optical low-coherent interferometric technology for long-period grating (LPG) Mach-Zehnder interferometers is described. By including the coupling and recoupling behaviors of a LPG pair, a numerical model is developed to analyze the output reflectogram of the system. The effects of the grating interval, grating length, grating strength, and light source on the output reflectogram have been comprehensively discussed, which reveals that the low-coherence reflectometry offers the capability of interrogating the multiplexed sensors based on LPG pairs. A comparison of the calculated and experimental results is presented, and an excellent agreement between the simulation and the measurement is shown.
Original languageEnglish
Pages (from-to)5733-5739
Number of pages7
JournalApplied Optics
Issue number22
Publication statusPublished - 1 Aug 2006
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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