Effect of laser wavelength on the generation efficiency of stimulated Raman emission in the femtosecond regime

• Published in: Japanese Journal of Applied Physics Vol. 36; no. 10; pp. 6376 - 6379
• Main Authors: OGATA, K, KAWANO, H, HIRAKAWA, Y, IMASAKA, T
• Format: Journal Article
• Language: English
• Published: Tokyo Japanese journal of applied physics 01-10-1997
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Nonlinear optics; Optics; Physics; Stimulated raman scattering; cars; Stimulated Raman scattering; Experimental study; Second harmonic; Laser pumping; Nonlinear optics
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/JJAP.36.6376

Rotational Raman lines are generated by stimulated Raman scattering and four-wave Raman mixing using the fundamental (810 nm) and second harmonic emission (405 nm) of a Ti:sapphire laser. The intensity of the Raman emission, measured at the different wavelengths, were compared and confirmed to be more pronounced when a second harmonic emission is used as a pump beam. This is attributed to a larger Raman gain coefficient at shorter wavelengths and better beam quality obtained by the second harmonic generation, as predicted from theory.