Degradation of side-mode suppression ratio in a DFB laser integrated with a semiconductor optical amplifier |
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| Authors: | Champagne A Lestrade M Camel J Maciejko R Tromborg B |
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| Affiliation: | Dept. de Genie Phys., Ecole Polytechnique de Montreal, Canada; |
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| Abstract: | 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. |
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