Modulated Noncollinear Optical Parametric Amplifier Output Induced by Stimulated Raman Scattering
Source abstract
Abstract
We studied spectra of the amplified signal from a noncollinear optical parametric amplifier (NOPA) based on a Ti:sapphire laser and BBO crystal gain medium. The signal shows characteristic structures with periodic intensity variations in the signal during the parametric amplification processes in a BBO crystal. This phenomenon is attributed to the stimulated Raman process excited by the pump pulse affected by the phase-matching condition of four-wave mixing. The effect of this stimulated Raman process on optical parametric amplification and on final pulse compression of the signal was analyzed. The results demonstrate that caution must be taken when constructing a NOPA. Specifically, great care must be taken not to use mirrors with non-uniform spectral reflectivity for obtaining a stable pulse in terms of both temporal and spectral shapes.
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Research context
OpenAlex topics: Laser-Matter Interactions and Applications · Advanced Fiber Laser Technologies · Spectroscopy Techniques in Biomedical and Chemical Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Advanced Ultrafast Laser Research Center, The University of Electro-Communications, 1-5-1, Chofugaoka, Chofu, Tokyo 182-8585, Japan
Japan Science and Technology Agency, Core Research for Evolutional Science and Technology (CREST), K’s Gobancho, 7, Gobancho, Chiyoda-ku, Tokyo 102-0076, Japan
Department of Electrophysics, National Chiao Tung University, 1001 Ta Hsueh Road, Hsin-Chu 3005, Taiwan
The University of Tokyo, Hongo, 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
Institute of Physics, Chinese Academy of Sciences, Huairou Science City, Beijing 100190, China
Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 390 Qinghe Road, Jiading District, Shanghai 201800, China
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