Modeling of Actively Q-Switched Intracavity Raman Lasers

The normalized space-dependent rate equations are deduced assuming the intracavity photon densities and initial population-inversion density to be of Gaussian spatial distributions in the diode-pumped actively Q -switched intracavity Raman lasers. Numerical calculations are carried out to investigat...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2007-08, Vol.43 (8), p.722-729
Main Authors: Ding, Shuanghong, Zhang, Xingyu, Wang, Qingpu, Chang, Jun, Wang, Shumei, Liu, Yuru
Format: Article
Language:English
Subjects:
Approximation
Density
Differential equations
Diode-pumped lasers
Diodes
Exact sciences and technology
Fluid flow
Fundamental areas of phenomenology (including applications)
Gaussian
Information science
Intracavity Raman lasers
Laser modes
Laser optical systems: design and operation
Laser theory
Lasers
Mathematical analysis
Mathematical models
Nonlinear equations
Nonlinear optics
Optical resonators
Optics
Performance analysis
Physics
Q-switching
Raman lasers
Raman scattering
rate equations
Spatial distribution
stimulated Raman scattering
Stimulated raman scattering
cars
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Summary:The normalized space-dependent rate equations are deduced assuming the intracavity photon densities and initial population-inversion density to be of Gaussian spatial distributions in the diode-pumped actively Q -switched intracavity Raman lasers. Numerical calculations are carried out to investigate the influences of these normalized variables on the pulse parameters of the first Stokes. The rate equations under the planewave approximation are also normalized and solved numerically, and the results show the obvious discrepancies from those of the space-dependent theory. The spontaneous Raman scattering factor in rate equations are deduced in detail for the first time, and the oscillating threshold of the first Stokes inside the resonator is deduced analytically. A sample calculation for an actively Q -switched self-Raman laser is presented to demonstrate the use of the curves and related formulas.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2007.901585