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Performance analysis of gain-clamped semiconductor optical amplifiers using different clamping schemes

Summary form only given. Semiconductor optical amplifiers (SOA) can be used for wide-band all-optical signal regeneration, optical gating, and photonic switching applications. However, the higher channel crosstalk limits its system utilization. Recent works on gain clamped SOAs were trying to overcome the problem. A strong but out-of-band optical signal is used to clamp the carrier (gain) in an SOA. The clamping signal can be provided through an internally distributed feedback (DFB) or distributed-Bragg-reflector (DBR) laser or from an externally injected optical source. The purpose of this paper is to analyze and compare both schemes and to find a more effective way to achieve high gain, low crosstalk, wide-band signal regeneration.