A study of the response of intermodal interference patterns at a fiber coupler output

Katerina Zhelyazkova; Tinko Eftimov; Plamen Balzhiev

doi:10.1117/12.2014485

15 March 2013 A study of the response of intermodal interference patterns at a fiber coupler output

Katerina Zhelyazkova, Tinko Eftimov, Plamen Balzhiev

Proceedings Volume 8770, 17th International School on Quantum Electronics: Laser Physics and Applications; 877013 (2013) https://doi.org/10.1117/12.2014485
Event: Seventeenth International School on Quantum Electronics: Laser Physics and Applications, 2012, Nessebar, Bulgaria

Abstract

In this paper we derive interference equations and present theoretical models for a variety of cases of interfering mode pairs: non-degenerate and non-degenerate; non-degenerate and degenerate as well as degenerate and degenerate even/odd LP modes assuming a Gaussian approximation and an identical polarization. For 2x2 fiber couplers of different coupling ratios and single mode at 1310/1550nm, we measure the coupling ratio in a few mode regime of operation at 650nm and record the pattern distributions. We find a very good correspondence between theoretical and experimental results which will be used for optimizing a CCD array used for the analysis of the external disturbances along an optical fiber intrusion sensor.

Citation Download Citation

Katerina Zhelyazkova, Tinko Eftimov, and Plamen Balzhiev "A study of the response of intermodal interference patterns at a fiber coupler output", Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 877013 (15 March 2013); https://doi.org/10.1117/12.2014485

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