Ultra-compact acousto-optic modulator of a fibre Bragg grating in a highly birefringent suspended core fibre

Ricardo E. Da Silva, Egor Manuylovich, Namita Sahoo, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, David J. Webb

Research output: Contribution to journalConference articlepeer-review


Highly efficient and compact acousto-optic modulator of a fibre Bragg grating is reported for the first time. The device is composed of millimetre scaled components and a 1 cm grating inscribed in a four air holes birefringent suspended core fibre. The reflection of the orthogonal polarization modes is tuned by a sinusoidal electrical signal at the resonance frequency of 469 kHz. A significant modulation depth of 45% is achieved at a maximum drive voltage of 10 V. The demonstrated 4 cm long all-fibre modulator is 60% shorter compared to previous similar setups, indicating new possibilities for stable and fast switching of fibre-integrated photonic devices.

Original languageEnglish
Article number117730U
JournalProceedings of SPIE - International Society for Optical Engineering
Publication statusPublished - 18 Apr 2021
EventMicro-structured and Specialty Optical Fibres VII - Online Only, Czech Republic
Duration: 19 Apr 202124 Apr 2021

Bibliographical note

Copyright 2021 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Funding Information:
This project has received funding from the European Union´s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 713694.


  • Acousto-optic modulator
  • Birefringent suspended core fibre
  • Fibre Bragg grating


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