Crystal-cored fibers using organic materials for frequency doubling have been reported.1-3 However, semiconductor lasers have not been used as fundamental waves. Here we report the second harmonic generation of an 884-nm cw semiconductor laser using an organic crystal-cored fiber. The organic material used is a newly developed 3,5-dimethyl-l-(4-nitrophenyl) pyrazole (DMNP)4 having a relatively large nonlinear optical coefficient.

© 1990 Optical Society of America

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