Diameter measurement of optical nanofibers using a composite photonic crystal cavity

Jameesh Keloth, Mark Sadgrove, Ramachandrarao Yalla, Kohzo Hakuta

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We demonstrate a method for making precise measurements of the diameter of a tapered optical fiber with a sub-wavelength diameter waist (an optical nanofiber). The essence of the method is to create a composite photonic crystal cavity by mounting a defect-mode grating on an optical nanofiber. The resultant cavity has a resonance wavelength that is sensitive to the nanofiber's diameter, allowing the diameter to be inferred from optical measurements. This method offers a precise, nondestructive, and in situ way to characterize the nanofiber diameter.

Original languageEnglish
Pages (from-to)4122-4125
Number of pages4
JournalOptics Letters
Volume40
Issue number17
DOIs
Publication statusPublished - 2015

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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