Degradation of Side-Mode Suppression Ratio in a DFB Laser Integrated With a Semiconductor Optical Amplifier

A. Champagne, Michel Lestrade, Jérôme Camel, Roman Maciejko, Bjarne Tromborg

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The degradation of the side-mode suppression ratio (SMSR) in a monolithically integrated distributed feedback laser and semiconductor optical amplifier (SOA) cavity is investigated. An expression is derived that gives the degradation of the SMSR in the case of a perfectly antireflection-coated SOA facet. The amplified spontaneous emission (ASE) backcoupling can have dramatic effects and degrade the SMSR of single-mode devices to unacceptable levels.
Original languageEnglish
JournalIEEE Journal of Quantum Electronics
Issue number7
Pages (from-to)871-877
Publication statusPublished - 2004

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