5 December 2017 Experimental investigation of polarization insensitivity and cascadability with semiconductor optical amplifier-based differential phase-shift keyed wavelength converter
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Abstract
We experimentally investigate the polarization insensitivity and cascadability of an all-optical wavelength converter for differential phase-shift keyed (DPSK) signals for the first time. The proposed wavelength converter is composed of a one-bit delay interferometer demodulation stage followed by a single semiconductor optical amplifier. The impact of input DPSK signal polarization fluctuation on receiver sensitivity for the converted signal is carried out. It is found that this scheme is almost insensitive to the state of polarization of the input DPSK signal. Furthermore, the cascadability of the converter is demonstrated in a two-path recirculating loop. Error-free transmission is achieved with 20 stage cascaded wavelength conversions over 2800 km, where the power penalty is < 3.4    dB at bit error rate of 10 9 .
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Yaya Mao, Chongqing Wu, Bo Liu, Rahat Ullah, Feng Tian, "Experimental investigation of polarization insensitivity and cascadability with semiconductor optical amplifier-based differential phase-shift keyed wavelength converter," Optical Engineering 56(12), 126103 (5 December 2017). https://doi.org/10.1117/1.OE.56.12.126103 . Submission: Received: 6 August 2017; Accepted: 6 November 2017
Received: 6 August 2017; Accepted: 6 November 2017; Published: 5 December 2017
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