Experimental and Numerical Study of Stimulated Raman Scattering in an Astigmatic Focus
article
An astigmatic focus has been used to increase the conversion efficiency of a Raman cell at high pump energy. Experimental and numerical results show that the increased conversion is due to the reduction of cascade second order Stokes. It is shown that other e5ects, namely Brillouin scattering, anti-Stokes generation, and ground-state depletion are negligible for our experimental setup. The experimental and numerical calculations correspond. In particular, the pump energy where the conversion for an ordinary focus is identical to an astigmatic focus is reproduced by the calculations. Below this energy an ordinary focus gives a higher conversion than an astigmatic focus, while above this energy this is reversed.
TNO Identifier
94659
Source
IEEE Journal of Quantum Electronics, 29(8), pp. 2267-2272.
Pages
2267-2272
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