Answers are grounded in this paper and cite their sources.
A technique for the realization of a nonuniform grating coupling coefficient kappa , and its implementation in distributed-feedback (DFB) lasers is presented. This technique, which is an extension of the buried-grating concept, offers precise control of the coupling coefficient and enables a kappa -ratio greater than 10. DFB lasers with an asymmetric kappa -variation have been fabricated using this method. A front-to-rear facet output power ratio close to five was obtained, qualitatively in agreement with simulations.>
No takes yet. Share an insight, caveat, or question.
Nilsson et al. (1993) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: