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1 November 1996 Benefits of long-wavelength hyper-Rayleigh scattering
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A hyper-Rayleigh scattering, HRS, system constructed around an optical parametric power oscillator, allowing wide fundamental wavelength tunability is described. The benefits of this system are highlighted by out-of-resonance measurements of the octupolar molecular ion crystal violet at 1450 and 1500 nm. The static hyperpolarizability was found to be comparable with that of the dipolar dye Disperse Red 1 with the nonlinearity-transparency trade-off worse for the octupole. Multiphoton induced fluorescence is one of the major obstacles with HRS. With a tunable laser system this problem can be overcome for a lot of chromophores. This is demonstrated by HRS-measurements of two dicyanovinyl compounds at 1300 nm and a stilbazolium salt at 1500 nm.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stefan Stadler, Grant Bourhill, and Christoph R. Braeuchle "Benefits of long-wavelength hyper-Rayleigh scattering", Proc. SPIE 2852, Nonlinear Optical Properties of Organic Materials IX, (1 November 1996);

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