Open AccessDEGENERATE QUANTUM-BEAT LASER
Author(s) -
Xiangming Hu
Publication year - 1992
Publication title -
acta physica sinica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.41.1782
Subject(s) - lasing threshold , laser , degenerate energy levels , physics , beat (acoustics) , coherence (philosophical gambling strategy) , quantum optics , optics , quantum , gain switching , spontaneous emission , quantum noise , atomic physics , quantum mechanics
Both Λ-type system and V-type one can show lasing without inyersion and inversion without lasing due to atomic coherence. Spontaneous emission noise of Λ-type laser is reduced due to coherent substraction but that of V-type laser is reduced due to coherent addition
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