Femtosecond inscription of a spectral array of four fiber Bragg gratings at the same spot, using a single uniform phase-mask

A. Halstuch, A. A. Ishaaya

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

An array of four fiber Bragg gratings (FBGs) is inscribed at the same spot with a single uniform phase-mask (PM). The inscription setup consists of an 800 nm femtosecond laser, a PM, a defocusing spherical lens and a cylindrical focusing lens. The wavelength tunability of the center Bragg wavelength is achieved by a defocusing lens, and by PM translation. An FBG is inscribed, followed by three cascaded FBGs, which are inscribed exactly at the same spot, only after a movement of the PM. The second order Bragg grating array at ~1.55 µm transmission spectra of these four FBGs is measured, showing a spectral shift of ~1.8 nm between each one, and a total spectral shift of ~5.4 nm. The transmission dip of each FBG is approximately −6 dB. The third order Bragg grating array at ~1.04 µm transmission spectra shows a transmission dip of approximately −3 dB, a wavelength separation of ~1.2 nm between each one, and a total wavelength shift of ~3.6 nm.

Original languageEnglish
Title of host publicationSpecialty Optical Fibres
EditorsKyriacos Kalli, Alexis Mendez, Pavel Peterka
PublisherSPIE
ISBN (Electronic)9781510662667
DOIs
StatePublished - 1 Jan 2023
EventSpecialty Optical Fibres 2023 - Prague, Czech Republic
Duration: 24 Apr 202325 Apr 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12573
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSpecialty Optical Fibres 2023
Country/TerritoryCzech Republic
CityPrague
Period24/04/2325/04/23

Keywords

  • Femtosecond inscription
  • Fiber Bragg gratings
  • Fiber Bragg gratings arrays
  • Optical fibers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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