All-fiber fast acousto-optic temporal control of tunable optical pulses

Ricardo E. da Silva, Egor Manuylovich, Namita Sahoo, Marcos A.R. Franco, Hartmut Bartelt, David J. Webb

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate a new all-fiber electrically tunable modulation method which significantly reduces the response time of a Bragg grating acousto-optic modulator. A 4 cm long device is fabricated with a 1 cm grating inscribed in a suspended core fiber. An acoustic pulse train is switched out of phase along the fiber, damping unwanted natural resonant vibrations inside the grating. The device rise time is decreased from 56 to 9 µs by tuning the duty cycle of the driven electrical signal, contributing to achieve the shortest switching time of 15.6 µs. This tunable temporal response reveals unique features to change the profile of optical pulses. High pulse modulation depths are achieved employing a compact acousto-optic modulator, pointing to fast switching of all-fiber photonic devices.
Original languageEnglish
Article number103877
Number of pages7
JournalOptical Fiber Technology
Volume87
Early online date12 Jun 2024
DOIs
Publication statusE-pub ahead of print - 12 Jun 2024

Bibliographical note

Copyright © 2024 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).

Keywords

  • Acousto-optic modulators
  • Fiber Bragg gratings
  • Suspended core fibers
  • Tunable optical pulses
  • Numerical simulation

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