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24 March 2023 Use of the Fourier method for robust single-frequency index-patterned laser design
Niall D. Boohan, Brian Kelly, Eoin P. O'Reilly
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Proceedings Volume PC12415, Physics and Simulation of Optoelectronic Devices XXXI; PC1241503 (2023) https://doi.org/10.1117/12.2646345
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
The use of index-patterned Fabry-Perot lasers, where a small number of slot-like features are introduced along the laser cavity, is well established as a route to low cost, reliable single-frequency devices. We use a Fourier-transform based inverse scattering method to show how a modified choice of inverse function can deliver a significant improvement in modal threshold gain selectivity and SMSR compared to the originally proposed use of a constant inverse function for slot selection. We propose that the approach used can deliver a high yield of devices, with emission wavelength at or close to a target wavelength.
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Niall D. Boohan, Brian Kelly, and Eoin P. O'Reilly "Use of the Fourier method for robust single-frequency index-patterned laser design", Proc. SPIE PC12415, Physics and Simulation of Optoelectronic Devices XXXI, PC1241503 (24 March 2023); https://doi.org/10.1117/12.2646345
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KEYWORDS
Laser development
Fourier transforms
Lithography
Phase shifting
Semiconductor lasers
Waveguide lasers
Waveguides
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