Optical filtering with axial whispering gallery modes on the surface of tapered optical fibers

Zhiyong Han, Semen S. Fast, Emile Klotz, Ilya D. Vatnik, D. V. Churkin

Research output: Contribution to journalArticlepeer-review

Abstract

We study the Q-factors of whispering gallery modes on the surface of standard optical fibers using both spectral and ring-down measurements and show that annealing by the fire torch yields Q-factors higher than 107. In this case, however, variations of the effective radius are introduced, that make the mode spectrum complicated as a number of modes with a nonzero axial component of the wave vector appear. We demonstrate that tapering the fiber sample allows to evade this complexity and to build up an efficient filter operating in transmission.

Original languageEnglish
Article number066201
Number of pages4
JournalLaser Physics Letters
Volume17
Issue number6
DOIs
Publication statusPublished - 1 Jun 2020

Keywords

  • microresonator
  • optical fber
  • quality factor
  • Whispering gallery mode
  • whispering gallery mode
  • ROBUST
  • MICRORESONATOR
  • optical fiber
  • RESONATOR

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