Line-by-line fiber Bragg grating made by femtosecond laser

Kaiming Zhou, Mykhaylo Dubov, Chengbo Mou, Lin Zhang, Vladimir Mezentsev

Research output: Contribution to journalArticlepeer-review

Abstract

In this letter, we report on the inscription of a fourth-order fiber Bragg grating made line-by-line in the optical fiber using a femtosecond laser. Strong Bragg resonance (~17 dB) and low insertion loss (~0.5 dB) were obtained with only 2000 periods. Measured refractive index change of these inscribed lines reaches up to 7 × 10-3. The grating was fully characterized and the low insertion loss together with low polarization-dependent loss were realized compared to gratings made by the point-by-point method. The high temperature annealing experiment shows the grating can survive up to at least 800°C.
Original languageEnglish
Article number5471129
Pages (from-to)1190-1192
Number of pages3
JournalIEEE Photonics Technology Letters
Volume22
Issue number16
DOIs
Publication statusPublished - 15 Aug 2010

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Keywords

  • Bragg resonance
  • femtosecond laser
  • high temperature annealing
  • line-by-line fiber Bragg grating
  • low insertion loss

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