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Proceedings Paper

A study of the response of intermodal interference patterns at a fiber coupler output
Author(s): Katerina Zhelyazkova; Tinko Eftimov; Plamen Balzhiev
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Paper 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.

Paper Details

Date Published: 15 March 2013
PDF: 8 pages
Proc. SPIE 8770, 17th International School on Quantum Electronics: Laser Physics and Applications, 877013 (15 March 2013); doi: 10.1117/12.2014485
Show Author Affiliations
Katerina Zhelyazkova, Paisii Hilendarski Univ. of Plovdiv (Bulgaria)
Tinko Eftimov, Paisii Hilendarski Univ. of Plovdiv (Bulgaria)
Plamen Balzhiev, Paisii Hilendarski Univ. of Plovdiv (Bulgaria)


Published in SPIE Proceedings Vol. 8770:
17th International School on Quantum Electronics: Laser Physics and Applications
Tanja N. Dreischuh; Albena T. Daskalova, Editor(s)

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