1 Department of Photonics Engineering, Technical University of Denmark2 Ecole Polytechnique de Montreal3 EADS-Launch Vehicles4 Ecole Polytechnique de Montreal
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.
Ieee Journal of Quantum Electronics, 2004, Vol 40, Issue 7, p. 871-877