Optical micro-knot resonator hydrophone

J. M. De Freitas, T. A. Birks, M. Rollings

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present results of what are believed to be the first underwater acoustic sensor using an optical micro-knot resonator. The mechanism involves straining the micro-fibre loop of the knot via an appropriate encapsulation material. The micro-knot sensor exhibited a spectral fullwidth half-depth of 37.7pm with a Q-factor of 41100 after deconvolution with the source. The shift in wavelength at 1550nm was observed to be around 67pm RMS when exposed to underwater acoustic excitation at 40Hz demonstrating a normalized sensitivity of -288 dB re μPa-1, or 5.83 fm/Pa.

LanguageEnglish
Pages5850-5860
Number of pages11
JournalOptics Express
Volume23
Issue number5
DOIs
StatusPublished - 9 Mar 2015

Fingerprint

underwater acoustics
hydrophones
resonators
acoustic excitation
sensors
Q factors
fibers
sensitivity
shift
wavelengths

Cite this

Optical micro-knot resonator hydrophone. / De Freitas, J. M.; Birks, T. A.; Rollings, M.

In: Optics Express, Vol. 23, No. 5, 09.03.2015, p. 5850-5860.

Research output: Contribution to journalArticle

De Freitas, JM, Birks, TA & Rollings, M 2015, 'Optical micro-knot resonator hydrophone', Optics Express, vol. 23, no. 5, pp. 5850-5860. https://doi.org/10.1364/OE.23.005850
De Freitas, J. M. ; Birks, T. A. ; Rollings, M. / Optical micro-knot resonator hydrophone. In: Optics Express. 2015 ; Vol. 23, No. 5. pp. 5850-5860.
@article{49b14210c8c341f6bf2f203822cab702,
title = "Optical micro-knot resonator hydrophone",
abstract = "We present results of what are believed to be the first underwater acoustic sensor using an optical micro-knot resonator. The mechanism involves straining the micro-fibre loop of the knot via an appropriate encapsulation material. The micro-knot sensor exhibited a spectral fullwidth half-depth of 37.7pm with a Q-factor of 41100 after deconvolution with the source. The shift in wavelength at 1550nm was observed to be around 67pm RMS when exposed to underwater acoustic excitation at 40Hz demonstrating a normalized sensitivity of -288 dB re μPa-1, or 5.83 fm/Pa.",
author = "{De Freitas}, {J. M.} and Birks, {T. A.} and M. Rollings",
year = "2015",
month = "3",
day = "9",
doi = "10.1364/OE.23.005850",
language = "English",
volume = "23",
pages = "5850--5860",
journal = "Optics Express",
issn = "1094-4087",
publisher = "Optical Society of America",
number = "5",

}

TY - JOUR

T1 - Optical micro-knot resonator hydrophone

AU - De Freitas, J. M.

AU - Birks, T. A.

AU - Rollings, M.

PY - 2015/3/9

Y1 - 2015/3/9

N2 - We present results of what are believed to be the first underwater acoustic sensor using an optical micro-knot resonator. The mechanism involves straining the micro-fibre loop of the knot via an appropriate encapsulation material. The micro-knot sensor exhibited a spectral fullwidth half-depth of 37.7pm with a Q-factor of 41100 after deconvolution with the source. The shift in wavelength at 1550nm was observed to be around 67pm RMS when exposed to underwater acoustic excitation at 40Hz demonstrating a normalized sensitivity of -288 dB re μPa-1, or 5.83 fm/Pa.

AB - We present results of what are believed to be the first underwater acoustic sensor using an optical micro-knot resonator. The mechanism involves straining the micro-fibre loop of the knot via an appropriate encapsulation material. The micro-knot sensor exhibited a spectral fullwidth half-depth of 37.7pm with a Q-factor of 41100 after deconvolution with the source. The shift in wavelength at 1550nm was observed to be around 67pm RMS when exposed to underwater acoustic excitation at 40Hz demonstrating a normalized sensitivity of -288 dB re μPa-1, or 5.83 fm/Pa.

UR - http://www.scopus.com/inward/record.url?scp=84981311974&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1364/OE.23.005850

U2 - 10.1364/OE.23.005850

DO - 10.1364/OE.23.005850

M3 - Article

VL - 23

SP - 5850

EP - 5860

JO - Optics Express

T2 - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 5

ER -