PHASE-SENSITIVE ABOVE-THRESHOLD LASER-AMPLIFIERS

Authors
MU Y SAVAGE CM
Citation
Y. Mu et Cm. Savage, PHASE-SENSITIVE ABOVE-THRESHOLD LASER-AMPLIFIERS, Physical review. A, 49(5), 1994, pp. 4093-4100
Citations number
21
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
49
Issue
5
Year of publication
1994
Part
B
Pages
4093 - 4100
Database
ISI
SICI code
1050-2947(1994)49:5<4093:PAL>2.0.ZU;2-0
Abstract
We present a quantum-mechanical analysis of an above-threshold laser a mplifier made phase sensitive by an injected field. The gain and noise are calculated in a high-Q cavity with four-level atoms as the lasing medium. We find that for coherent-state inputs this amplifier can pre serve the signal-to-noise ratio thus achieving the theoretical best no ise performance.