Wavelength Routing Switching using Birefringent Fiber By Coupled Polarization Modes
P.P. Yupapin
Lightwave Technology Research Center, Department of Applied Physics,
Faculty of Science King Mongkut's Institute of Technology Ladkrabang (KMITL), Bangkok 10520, Thailand
Tel: 6627373000 ext. 6271, Fax: 3269981, E-mail :Yupapin.Preecha@kmitl.ac.th
ABSTRACT -- This paper presents the study of an optical signal processing scheme known as a wavelength routing switching where the selected wavelength channel is routed by stretching a polarization maintaining fiber. The principle of the scheme is that the wavelength channel multiplexing signals are orthogonaly combined then propagated in a single mode polarization maintaining fiber. The desired wavelength channels could be controlled by stretching, i.e. coupling, the employed fiber length. Results obtained using two multiplexed wavelength channels of 670 and 632.8 nm sources have shown the measured crosstalk of -7 dB, where the signal to noise ratio of 14 dB was achieved.
KEYWORDS -- Optical switching, Optical devices
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