Influence of depressed-index outer ring on evanescent tunneling loss in tapered double-cladding fibers

Nan Kuang Chen*, Kuei Chu Hsu, Shien Kuei Liaw, Yin-Chieh Lai, Sien Chi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A tapered fiber with a depressed-index outer ring is fabricated and dispersion engineered to generate a widely tunable (1250-1650 nm) fundamental-mode leakage loss with a high cutoff slope (-1.2 dB/nm) and a high attenuation for stop band (>50 dB) by modification of both waveguide and material dispersions. The higher cutoff slope is achieved with a larger cross angle between the two refractive index dispersion curves of the tapered fiber and surrounding optical liquids through the use of depressed-index outer ring structures in double-cladding fibers.

Original languageEnglish
Pages (from-to)1666-1668
Number of pages3
JournalOptics Letters
Volume33
Issue number15
DOIs
StatePublished - 1 Aug 2008

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