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Noise properties and phase resolution of interferometer systems interrogated by narrowband fiber ASE sources

Noise properties and phase resolution of interferometer systems interrogated by narrowband fiber ASE sources
Noise properties and phase resolution of interferometer systems interrogated by narrowband fiber ASE sources
We present the results of a detailed theoretical and experimental study of the noise properties of various interferometer systems interrogated using narrowband spontaneous emission. The filtering effect of the interferometer is shown to introduce periodic structure in the optical noise spectrum with a period, level, and modulation depth that depends on the exact interferometer configuration and implementation, as well as the source linewidth and spectral shape. Our theoretical analysis, based on the assumption of a Gaussian random process model for the inherent source noise is in good agreement with our experimental results. Finally, using a dual Mach-Zehnder interferometer incorporating a frequency shifter, we show that minimum phase sensitivities of a few tens of µrad/√Hz can be achieved for practical values of length mismatch by optimization of the source linewidth, heterodyne frequency, and interferometer birefringence. We believe the approach to be suitable for a broad range of sensing applications.
0733-8724
2327-2335
Kim, H.S.
e5312734-e17b-419a-b18a-c5bff0c839c7
Haaksman, R.P.H.
f559e273-cc06-469d-b667-31c260550dc7
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Kim, H.S.
e5312734-e17b-419a-b18a-c5bff0c839c7
Haaksman, R.P.H.
f559e273-cc06-469d-b667-31c260550dc7
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3

Kim, H.S., Haaksman, R.P.H., Newson, T.P. and Richardson, D.J. (1999) Noise properties and phase resolution of interferometer systems interrogated by narrowband fiber ASE sources. IEEE Journal of Lightwave Technology, 17 (11), 2327-2335. (doi:10.1109/50.803026).

Record type: Article

Abstract

We present the results of a detailed theoretical and experimental study of the noise properties of various interferometer systems interrogated using narrowband spontaneous emission. The filtering effect of the interferometer is shown to introduce periodic structure in the optical noise spectrum with a period, level, and modulation depth that depends on the exact interferometer configuration and implementation, as well as the source linewidth and spectral shape. Our theoretical analysis, based on the assumption of a Gaussian random process model for the inherent source noise is in good agreement with our experimental results. Finally, using a dual Mach-Zehnder interferometer incorporating a frequency shifter, we show that minimum phase sensitivities of a few tens of µrad/√Hz can be achieved for practical values of length mismatch by optimization of the source linewidth, heterodyne frequency, and interferometer birefringence. We believe the approach to be suitable for a broad range of sensing applications.

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More information

Published date: 1999
Organisations: Optoelectronics Research Centre, Electronics & Computer Science

Identifiers

Local EPrints ID: 77771
URI: https://eprints.soton.ac.uk/id/eprint/77771
ISSN: 0733-8724
PURE UUID: da2c92e1-21dd-4b80-b06d-8691f68c2194
ORCID for D.J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

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Date deposited: 11 Mar 2010
Last modified: 26 Nov 2019 02:05

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Contributors

Author: H.S. Kim
Author: R.P.H. Haaksman
Author: T.P. Newson
Author: D.J. Richardson ORCID iD

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