Laser diode self-injection locking to an integrated high-Q Fabry-P\'erot microresonator
Autor: | Ulanov, Alexander E., Wildi, Thibault, Bhatnagar, Utkarsh, Herr, Tobias |
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Rok vydání: | 2024 |
Předmět: | |
Druh dokumentu: | Working Paper |
Popis: | Self-injection locking (SIL) of laser diodes to microresonators is a powerful technique that enables compact narrow linewidth lasers. Here, we extend this technique to chip-integrated Fabry-P\'erot microresonators, which offer high-quality factors and large mode volumes in a compact footprint, reducing fundamental thermo-refractive noise. The resonators consist of a silicon nitride waveguide terminated by two photonic crystal reflectors fabricated via scalable ultraviolet lithography. Evanescent side-coupling allows precise tuning of the SIL feedback mechanism. We present a theoretical model and experimentally demonstrate SIL, resulting in a fundamental thermorefractive-noise-limited laser. We achieve excellent agreement between the experimental results and theoretical model. These results complement current SIL techniques and are relevant to chip-scale low-noise laser systems. Comment: 4 pages, 4 figures |
Databáze: | arXiv |
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