Suppression of modal noise of a graded-index multimode fiber in a white-light interferometric system

Yanong N. Ning; Yueai Liu; Kenneth T. V. Grattan; Kenneth Weir; Andrew W. Palmer

doi:10.1117/12.182035

5 August 1994 Suppression of modal noise of a graded-index multimode fiber in a white-light interferometric system

Yanong N. Ning, Yueai Liu, Kenneth T. V. Grattan, Kenneth Weir, Andrew W. Palmer

Proceedings Volume 2321, Second International Conference on Optoelectronic Science and Engineering '94; (1994) https://doi.org/10.1117/12.182035
Event: Optoelectronic Science and Engineering '94: International Conference, 1994, Beijing, China

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.

Citation Download Citation

Yanong N. Ning, Yueai Liu, Kenneth T. V. Grattan, Kenneth Weir, and Andrew W. Palmer "Suppression of modal noise of a graded-index multimode fiber in a white-light interferometric system", Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); https://doi.org/10.1117/12.182035

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