DocumentCode :
1945046
Title :
Gain without inversion in three-level V-type system: a dressed-state analysis
Author :
Braunstein, D. ; Shuker, Reuben
Author_Institution :
Dept. of Phys., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
fYear :
1998
fDate :
8-8 May 1998
Firstpage :
119
Lastpage :
120
Abstract :
Summary form only given.A three-level atom in the V-configuration is treated under two coherent laser fields at resonance with the two allowed transitions. The master equation for the system and full quantum mechanical Hamiltonian are derived, and equations of motion for the elements of the density matrix are obtained by projecting into the bare- and dressed-states schemes. Analysis of light amplification without population inversion in this V-type system is accomplished within the framework of the dressed-state basis. The physical content of the equations of motion for the density matrix elements, namely the coherences and the populations is provided by identifying effective decay and relaxation rates and gain/absorption constants with the appropriate composite coefficients. These depend on the Rabi frequencies of both the drive and probe coherent fields. Time-dependent solutions for both the coherences and the populations are obtained both numerically and analytically under the secular approximation. We have shown how to construct these analytical approximate time-dependent solutions for dressed-state populations and coherences. These approximate solutions, as well as the full numerical calculation quantities, exhibit oscillations at the generalized Rabi frequency.
Keywords :
laser theory; laser transitions; master equation; optical pumping; population inversion; quantum optics; Rabi frequencies; allowed transitions; coherent laser fields; density matrix; dressed-state analysis; effective decay; equations of motion; gain without inversion; gain/absorption constants; light amplification; master equation; quantum mechanical Hamiltonian; relaxation rates; resonance; three-level V-type system; three-level atom; time-dependent solutions; Atom lasers; Atom optics; Atomic beams; Laser beams; Laser theory; Optical beams; Optical pulse generation; Optical scattering; Physics; Spirals;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Quantum Electronics Conference, 1998. IQEC 98. Technical Digest. Summaries of papers presented at the International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-541-2
Type :
conf
DOI :
10.1109/IQEC.1998.680253
Filename :
680253
Link To Document :
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