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Proceedings Paper

Suppression of modal noise of a graded-index multimode fiber in a white-light interferometric system
Author(s): Yanong N. Ning; Yueai Liu; Kenneth T. V. Grattan; Kenneth Weir; Andrew W. Palmer
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Paper Abstract

A study on the effect of modal noise induced by the modal coupling effect in a graded index multimode fiber, illuminated by a light source with a tunable coherence length was carried out. It has been shown that the value of the signal-to-noise (S/N) ratio in an interferometric system could be reduced by the perturbation-induced modal noise if in the coherence length is in the region of 30 to 80 micrometers . As the coherence length increase, the S/N ratio will reduce correspondingly. However, when the value of the coherence length is in the region of 80 micrometers and upward, the value of the corresponding reduction in S/N ratio was seen to vary only over a very small range.

Paper Details

Date Published: 5 August 1994
PDF: 4 pages
Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); doi: 10.1117/12.182035
Show Author Affiliations
Yanong N. Ning, City Univ. (United Kingdom)
Yueai Liu, City Univ. (United Kingdom)
Kenneth T. V. Grattan, City Univ. (United Kingdom)
Kenneth Weir, City Univ. (United Kingdom)
Andrew W. Palmer, City Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 2321:
Second International Conference on Optoelectronic Science and Engineering '94
Wang Da-Heng; Anna Consortini; James B. Breckinridge, Editor(s)

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