Dynamic evolution of the spectrum of long-period fiber Bragg gratings fabricated from hydrogen-loaded optical fiber by ultraviolet laser irradiation.

نویسندگان

  • Keio Fujita
  • Yuji Masuda
  • Keisuke Nakayama
  • Maki Ando
  • Kenji Sakamoto
  • Jun-pei Mohri
  • Makoto Yamauchi
  • Masanori Kimura
  • Yasuo Mizutani
  • Susumu Kimura
  • Takashi Yokouchi
  • Yoshifumi Suzaki
  • Seiki Ejima
چکیده

Long-period fiber Bragg gratings fabricated by exposure of hydrogen-loaded fiber to UV laser light exhibit large-scale dynamic evolution for approximately two weeks at room temperature. During this time two distinct features show up in their spectrum: a large upswing in wavelength and a substantial deepening of the transmission minimum. The dynamic evolution of the transmission spectrum is explained quantitatively by use of Malo's theory of UV-induced quenching [Electron. Lett. 30, 442 (1994)] followed by refilling of hydrogen in the fiber core and the theory of hydrogen diffusion in the fiber material. The amount of hydrogen quenched by the UV irradiation is 6% of the loaded hydrogen.

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عنوان ژورنال:
  • Applied optics

دوره 44 33  شماره 

صفحات  -

تاریخ انتشار 2005