Asymmetric long period fiber gratings fabricated by use of CO2laser to carve periodic grooves on the optical fiber

Yi Ping Wang, D. N. Wang, Wei Jin, Yun Jiang Rao, Gang Ding Peng

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An asymmetric long period fiber grating (LPFG) with a large attenuation of -47.39 dB and a low insertion loss of 0.34 dB is fabricated by use of focused C O2 laser beam to carve periodic grooves on one side of the optical fiber. Such periodic grooves and the stretch-induced periodic microbends can effectively enhance the refractive index modulation and increase the average strain sensitivity of the resonant wavelength of the LPFG to -102.89 nmmε. The resonant wavelength and the peak attenuation of the LPFG can be tuned by ∼12 nm and ∼20 dB, respectively, by the application of a stretching force.
Original languageEnglish
Article number151105
JournalApplied Physics Letters
Issue number15
Publication statusPublished - 20 Oct 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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