Regular Paper

[OPTICAL REVIEW Vol. 21, No. 1 (2014) 48-53]
© 2014 The Japan Society of Applied Physics

Use of State of Polarization Transparent Scheme for Polarization Shift Keying Signal as Optical Phase Conjugator to Improve the Transmission Performance

Md. Nur-Al-Safa BHUIYAN1*, Motoharu MATSUURA2, Hung Nguyen TAN1, and Naoto KISHI1

1Department of Communication Engineering and Informatics, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
2Center for Frontier Science and Engineering, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan

(Received February 15, 2013; Revised October 21, 2013; Accepted November 19, 2013)

Transmission characteristics of polarization shift keying (PolSK) signal is experimentally demonstrated in this work. Performance degradation due to transmission is improved using optical phase conjugation (OPC) technique. The wavelength converter based on the proposed state of polarization (SOP) transparent scheme for PolSK signal is effective to use it as mid-link optical phase conjugator and which is difficult to achieve using conventional wavelength conversion scheme. It is found that for fiber transmission, the performance of both of the orthogonal SOPs of the PolSK signal is different for their respective chirping characteristics which can be optimized to be similar using proposed OPC technique.

Key words: fiber optics communication, nonlinear optics, four-wave-mixing, phase conjugation

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