Research shows improved SMSR over 40 dB in laser diodes, suggesting lower scattering losses in gratings.
Typical gratings used in single-mode laser diodes introduce high scattering losses. In this work, gratings are developed for applications requiring low losses, and are demonstrated showing >40 dB SMSR and tunable single-mode operation.
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Stirling et al. (2025) studied this question.
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