Measurement of optical fiber length

Van Hoi Pham; Roberto Coisson; Duc Thinh Vu; Huy Bui; Paolo Podini

doi:10.1117/12.427033

8 May 2001 Measurement of optical fiber length by the spectrum of intensity fluctuations using low-coherent light interference

Van Hoi Pham, Roberto Coisson, Duc Thinh Vu, Huy Bui, Paolo Podini

Author Affiliations +

Proceedings Volume 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001); (2001) https://doi.org/10.1117/12.427033
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '01), 2001, Yokohama, Japan

Abstract

Amplitude-division two-beam interferometry performed with temporally incoherent light (such as white light, i.e. the path difference is larger than the coherence length) is used to multiplex signals, and applied to the multiplexing of sensors, and for distance measurements. The detection is based on the use of a receiving interferometer tuned to approximately the same path difference. An alternative way to detect path differences in Low Coherent Intensity, by analyzing the output intensity fluctuations with a radio frequency spectrum analyzer (RFSA) is proposed. This is suitable for very long path differences. Experiments have been performed with different lengths from meter to some kilometer of single-mode optical fiber, in a Mach-Zehnder and Michelson configuration.

Citation Download Citation

Van Hoi Pham, Roberto Coisson, Duc Thinh Vu, Huy Bui, and Paolo Podini "Measurement of optical fiber length by the spectrum of intensity fluctuations using low-coherent light interference", Proc. SPIE 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001), (8 May 2001); https://doi.org/10.1117/12.427033

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