Extraction of gain parameters for truncated-well gain-coupled DFBlasers |
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Authors: | Morrison GB Adams DM Cassidy DT |
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Affiliation: | Dept. of Eng. Phys., McMaster Univ., Hamilton, Ont.; |
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Abstract: | An amplified spontaneous emission transfer matrix model for prediction of the subthreshold spectral output of distributed-feedback (DFB) lasers was developed and fitted to the spectra of truncated-well gain-coupled DFB lasers using a least-squares-fitting algorithm. Modal gains for the high- and low-gain segments of the truncated-well DFB lasers were extracted, and their evolution as a function of injection current was examined. Results explain the tendency for the truncated-well gain coupled DFB lasers to have higher yields of single-frequency lasers and larger sidemode suppression ratios than are expected from simple considerations |
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