Comparison between the single mode yield above threshold and the spatial hole burning corrected yield at threshold for index-coupled distributed feedback lasers with asymmetric facet reflectivities

초록

We investigate single mode yield above threshold for index coupled distributed feedback (DFB) lasers and compare that with spatial hole burning (SHB) corrected yield at threshold. If the criterion necessary for the SHB corrected yield is selected properly, the two yields give good agreements. For antireflection-high reflection (AR-HR) facets, the value of coupling strength, kappaL, which gives the highest single mode yield above threshold is approximately 0.9. In this case, the reflectivity of the AR facet should be less than 1.5%.

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