Cascaded fiber up-Taper modal interferometer and its application as fiber sensor

Shandong Dong, Bo Dong, Changyuan Yu, Yongxin Guo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


A cascaded fiber up-Taper interferometer (CFI) is proposed and demonstrated analytically and experimentally. The sensor head of the CFI consists of two cascaded miniaturized fiber up-Taper modal interferometers (MMIs). Sensing principle of the CFI is derived based on the transmission matrix method. Conclusions have been achieved that cascading MMIs can effectively improve its thermal sensitivity while strain sensitivity is reduced compared with that of the single MMI. Experimentally, thermal sensitivity of the CFI can reach 112.9 pm/°C, and almost two times as big as that of the single MMI. In contrast, its strain sensitivity is only-0.4 pm/μϵ, which is only 2/5 as small as that of the single MMI.

Original languageEnglish
Article number8509095
Pages (from-to)2675-2680
Number of pages6
JournalJournal of Lightwave Technology
Issue number11
Publication statusPublished - 1 Jun 2019


  • Fiber interferometer
  • fiber optics sensors
  • strain and temperature

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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