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All-optical wavelength conversion using SOA at nearly symmetric position in a fiber-based Sagnac interferometric loop

Xu, Lei and Glesk, Ivan and Baby, Varghese and Prucnal, Paul R. (2004) All-optical wavelength conversion using SOA at nearly symmetric position in a fiber-based Sagnac interferometric loop. IEEE Photonics Technology Letters, 16 (2). pp. 539-541. ISSN 1041-1135

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Abstract

We report an experimental analysis of the wavelength conversion operation of a fiber-based Sagnac interferometric loop with a semiconductor optical amplifier (SOA) at nearly symmetric position. Improved extinction ratio is obtained due to the complementary operation of cross-polarization modulation and cross-gain modulation effects. Power penalty of 2.4 dB was obtained when the SOA offset is 17% of the bit period, which enables the use of the Sagnac interferometer with asymmetrically placed SOA-the terahertz optical asymmetric demultiplexer (TOAD)-as a multiple-functionality all-optical signal processing network element.