TY - JOUR
T1 - All-fiber fast acousto-optic temporal control of tunable optical pulses
AU - da Silva, Ricardo E.
AU - Manuylovich, Egor
AU - Sahoo, Namita
AU - Franco, Marcos A.R.
AU - Bartelt, Hartmut
AU - Webb, David J.
N1 - 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/).
PY - 2024/10
Y1 - 2024/10
N2 - 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.
AB - 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.
KW - Acousto-optic modulators
KW - Fiber Bragg gratings
KW - Suspended core fibers
KW - Tunable optical pulses
KW - Numerical simulation
UR - https://linkinghub.elsevier.com/retrieve/pii/S1068520024002220
UR - http://www.scopus.com/inward/record.url?scp=85195546050&partnerID=8YFLogxK
U2 - 10.1016/j.yofte.2024.103877
DO - 10.1016/j.yofte.2024.103877
M3 - Article
SN - 1068-5200
VL - 87
JO - Optical Fiber Technology
JF - Optical Fiber Technology
M1 - 103877
ER -