Low phase noise self-injection-locked diode laser with a high-Q fiber resonator: model and experiment.
Opt Lett
; 49(8): 1933-1936, 2024 Apr 15.
Article
in En
| MEDLINE
| ID: mdl-38621044
ABSTRACT
Low phase noise and narrow linewidth lasers are achieved by implementing self-injection locking of a DFB laser on two distinct fiber Fabry-Perot resonators. More than 45â
dB improvement of the laser phase or frequency noise is observed when the laser is locked. In both cases, a frequency noise floor below 1â
Hz2/Hz is measured. The integrated linewidth of the best of the two lasers is computed to be in the range of 400â
Hz and appears to be dominated by vibration noise close to the carrier. The results are then compared with a model based on the retro-injected power and the Q factors ratio between the DFB laser and the resonator. This straightforward model facilitates the extraction of the theoretical performance of these sources close to the carrier, a characteristic still hidden by vibration noise.
Full text:
1
Database:
MEDLINE
Language:
En
Year:
2024
Type:
Article