TY  - JOUR
AU  - Ulanov, Alexander E.
AU  - Wildi, Thibault
AU  - Bhatnagar, Utkarsh
AU  - Herr, Tobias
TI  - Laser diode self-injection locking to an integrated high-Q Fabry–Perot microresonator
JO  - Optics letters
VL  - 49
IS  - 21
SN  - 0146-9592
CY  - Washington, DC
PB  - Soc.
M1  - PUBDB-2024-05510
SP  - 6261
PY  - 2024
AB  - 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–Perot (FP) microresonators, which offer high-quality factors and large mode volumes in a compact footprint, reducing fundamental thermorefractive noise (TRN). 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. The experiments and the theoretical model are in excellent agreement. These results complement current SIL techniques and are relevant to chip-scale low-noise laser systems.
LB  - PUB:(DE-HGF)16
C6  - pmid:39485462
UR  - <Go to ISI:>//WOS:001379623800003
DO  - DOI:10.1364/OL.539725
UR  - https://bib-pubdb1.desy.de/record/613004
ER  -