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15 December 2003 Designing semiconductor optical amplifiers for low multichannel gain crosstalk
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Proceedings Volume 5260, Applications of Photonic Technology 6; (2003)
Event: Applications of Photonic Technology, 2003, Quebec City, Québec, Canada
Gain crosstalk in semiconductor optical amplifiers (SOAs) developed for WDM networks has in the past been a limiting factor in SOA deployment. One recently-proposed solution is the gain-clamped SOA, where the amplifier gain is stabilized in a complex cross-cavity configuration. In this paper, we describe the design of conventional SOAs for low multi-channel gain crosstalk (GXT). Specifically, we compare alternatives for reducing crosstalk, including reductions in SOA length, current density, and the number of quantum wells. Numerical modeling shows the reduction in well number to have the largest impact; experimental result for a 4-well device show 2-channel GXT of -20 dB at a modulation frequency of 10 GHz, a fiber-coupled output power of +5 dBm (+2 dBm per channel), and a module gain of 15 dB.
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Keith J. Kasunic, Kostas Tastavridis, Michel Lestrade, Alain Champagne, and Romain Maciejko "Designing semiconductor optical amplifiers for low multichannel gain crosstalk", Proc. SPIE 5260, Applications of Photonic Technology 6, (15 December 2003);

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