Abstract
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 language | English |
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Pages (from-to) | 2017-2020 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 41 |
Issue number | 9 |
DOIs | |
State | Published - 1 May 2016 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics