1. Second-harmonic generation in a microradius LiNbO_3 cylinder with a quasi-elliptical cross section
- Author
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K. Giulietti, Jean-Pierre Wolf, G. Foulon, Jin Yu, Georges Boulon, Michel Ferriol, Amanda J. Ross, F. Sourgen, Marie-Thérèse Cohen-Adad, and Christelle Goutaudier
- Subjects
Materials science ,business.industry ,Scattering ,Autocorrelator ,Physics::Optics ,Second-harmonic generation ,Laser ,Atomic and Molecular Physics, and Optics ,law.invention ,Optics ,law ,Femtosecond ,Optoelectronics ,Surface second harmonic generation ,Fiber ,Whispering-gallery wave ,business - Abstract
LiNbO(3) single-crystal fibers with diameters of 63 and 230 mum were grown, and the second-harmonic-generation (SHG) process was studied with femtosecond laser pulses perpendicularly focused to the fiber. SHG occurred without collinear phase matching, leading to wavelength-independent overall conversion efficiency, unlike in a bulk crystal. The scattering pattern of the second harmonic exhibited an intense forward peak and an almost-uniform, less-intense distribution around the fiber, owing to trapping in high-Q whispering modes. Implementation of a second-order autocorrelator with the 63-mum fiber demonstrates its application potential.
- Published
- 1999
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