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Polarization-Dependent Gain in SOA-Based Optical Multistage Interconnection Networks

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4 Author(s)
Odile Liboiron-Ladouceur ; Dept. of Electr. Eng., Columbia Univ., New York, NY ; Keren Bergman ; Misha Boroditsky ; Misha Brodsky

The small polarization dependence (< 1 dB) of optical components becomes significant in optical multistage interconnection networks. The cumulative effect can ultimately limit physical layer scalability by changing the maximum number of internal nodes that optical packets can traverse error free. It is shown that for nodes based on commercial semiconductor optical amplifier (SOA) switches with polarization-dependent gains of less than 0.35 dB, the maximum number of cascaded nodes changes by as much as 20 nodes, depending on both the packet wavelength and its state of polarization. This deviation in the number of nodes could correspond to a 100-fold decrease in the number of interconnected ports of an optical interconnection network such as the data vortex. This dramatic effect is explained in terms of optical signal-to-noise ratio degradation due to accumulated amplified spontaneous emission noise originating from the SOA device in the node

Published in:

Journal of Lightwave Technology  (Volume:24 ,  Issue: 11 )