Femtosecond inscription of phase-shifted gratings by overlaid fiber Bragg gratings

Avishay Shamir, Amiel A. Ishaaya

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Two slightly shifted gratings are inscribed, one over the other, in an SMF fiber with a femtosecond laser and a phase mask. The transmission spectrum of the complex structure is similar to that of a phase-shifted grating; yet, the fabrication process is fast and simple compared to standard methods. High-quality semi-phase-shifted gratings with -24 dB transmission loss and <100 pm transmission bandwidth are presented. Their application as highly narrow micro-resonators and notch filters seems feasible.

Original languageEnglish
Pages (from-to)2017-2020
Number of pages4
JournalOptics Letters
Issue number9
StatePublished - 1 May 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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