Few-layer graphene integrated thin tilted fiber grating for all-optical switching

Biqiang Jiang, Yueguo Hou, Hongyang Wang, Xuetao Gan, Ailun Li, Zhen Hao, Kaiming Zhou, Lin Zhang, Jianlin Zhao

Research output: Contribution to journalArticlepeer-review

Abstract

Recently, the integration of two-dimensional materials with optical fibers has opened up a great opportunity to develop all-fiber signal-processing devices. Graphene is an ideal material for all-optical signal processing via thermal-optic effect because of its high electrical and thermal conductivity, as well as broadband light-matter interactions with fast responses. Herein, we report the achievement of all-optical switching with fast response by integrating few-layer graphene onto a tilted fiber Bragg grating (TFBG) inscribed in a reduced-diameter fiber. Relying on graphene's decent photothermal effect, the transmission spectrum of the TFBG could be all-optically modulated by tuning the incident pump power. The all-optical switch can consequently operate at a series of wavelengths owing to the TFBG's comb-like resonances. The reduced diameter of the graphene-integrated TFBG and the pump at its resonant wavelength promise the all-optical switch to have a fast-dynamic response of around 1 's and an extinction ratio exceeding 13 dB. This compact device with graphene integration has the potentials to be integrated into all-fiber system to extend the functions of all-optical signal processing.
Original languageEnglish
JournalJournal of Lightwave Technology
Early online date16 Nov 2020
DOIs
Publication statusE-pub ahead of print - 16 Nov 2020

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Keywords

  • All-optical switch
  • Graphene
  • Optical fiber devices
  • Optical fibers
  • Optical interferometry
  • Optical pumping
  • Optical surface waves
  • Optical switches
  • few-layer graphene
  • reduceddiameter fiber
  • tilted fiber grating

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