Laser diode self-injection locking to an integrated high-Q Fabry-P\'erot microresonator

Autor:	Ulanov, Alexander E., Wildi, Thibault, Bhatnagar, Utkarsh, Herr, Tobias
Rok vydání:	2024
Předmět:	Physics - Optics
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
Externí odkaz:	http://arxiv.org/abs/2408.08679 Zobrazit plný text záznamu View this record from Arxiv