Lasers with nonlinear active media
Journal Article
·
· Sov. J. Quant. Electron. (Engl. Transl.); (United States)
A theoretical investigation is made of the main relationships governing single-mode cw intracavity generation of the second optical harmonic in a laser with a nonlinear active medium which combines the functions of stimulated emission and frequency doubling by the superposition of laser and nonlinear optical processes in the nonlinear active medium. The basic equations determining the generation intensity are derived and solved analytically near the generation threshold and numerically outside the thresh old range. Analyses are made of travelling and standing-wave lasers with radiation coupled out on one and two sides. Investigations are made of cases when the resonator does not emit at the fundamental frequency ..omega../sub 1/ and only the ..omega../sub 2/=2..omega../sub 1/ radiation is coupled out or both the ..omega../sub 1/ and ..omega../sub 2/ waves are coupled out simultaneously. A study is also made of some characteristics of the propagation of coupled ..omega../sub 1,2/ waves in a semiinfinite nonlinear active medium, in particular, of the stability of the different solutions. An analysis is made of the effect of the main parameters (length of nonlinear active medium, pumping rates and nonlinearities, dissipative losses at the frequencies ..omega../sub 1,2/, and so on) on the generation intensity and choice of optimal conditions. It is shown that optimal values exist for the nonlinear active medium length, pumping, nonlinearity, and other factors.
- Research Organization:
- T. G. Shevchenko State University, Kiev
- OSTI ID:
- 6477774
- Journal Information:
- Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 8:11; ISSN SJQEA
- Country of Publication:
- United States
- Language:
- English
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