https://siliconphotonics.ece.ucsb.edu/index.php/node/564
Widely-tunable narrow-linewidth lasers with monolithically integrated external cavity | Bowers
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https://www.orbitslightwave.com/
Orbits Lightwave, Inc. World Leader in Narrow Linewidth Lasers and Filters
World leader in high power ultra narrow linewidth Slow Light single frequency fiber laser and ultra narrow Slow Light optical Filters
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https://portal.fis.tum.de/en/publications/narrow-linewidth-ingaaspinp-metal-clad-ridge-waveguide-distribute/
Narrow-linewidth ingaasp/inp metal-clad ridge-waveguide distributed feedback lasers - Technical...
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https://research.ibm.com/publications/lithium-niobate-based-narrow-linewidth-frequency-agile-integrated-lasers-with-petahertz-frequency-tuning-rate
Lithium-niobate-based narrow-linewidth frequency agile integrated lasers with petahertz frequency...
Lithium-niobate-based narrow-linewidth frequency agile integrated lasers with petahertz frequency tuning rate for OFC 2023 by Viacheslav Snigirev et al.
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https://chilasbv.com/
Chilas ultra narrow linewidth tunable lasers
PIC-based narrow linewidth tunable lasers from 685 nm to 1700 nm. No moving parts, linewidth below 5 kHz. For quantum, sensing, telecom, and more.
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https://publications-cnrc.canada.ca/eng/view/object/?id=1bf9caa4-7805-43f0-a14e-3ab112a1ae2a
Ultra-narrow linewidth quantum dot coherent comb lasers with self-injection feedback locking - NRC...
Ultra-narrow linewidth quantum dot coherent comb lasers with self-injection feedback locking