Fabrication and characterization of a broadband long-period grating on a hollow optical fiber with femtosecond laser pulses

Woosung Ha, Kyunghwan Oh, Yongmin Jung, Jun Ki Kim, Woojin Shin, Ik Bu Sohn, Do Kyeong Ko, Jongmin Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have fabricated broadband long-period gratings (LPGs) on hollow optical fibers (HOFs) by 15 corrugating slots with various widths by point-by-point exposure of a Ti:sapphire femotosecond laser. The corrugated LPGs showed unique broadband rejection whose FWHM extended to 190 nm with a low insertion loss of less than 1 dB. The maximum coupling strength was 8.5 dB, which is a significant improvement in comparison with previous HOF acousto-optic tunable filters (AOTFs). The center wavelength and coupling strength of the resonant peak could be systematically controlled by modulating the width of the corrugation.

Original languageEnglish
Pages (from-to)3814-3817
Number of pages4
JournalJournal of the Korean Physical Society
Volume53
Issue number6 PART 1
Publication statusPublished - 2008 Dec 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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