GENERATION OF BLUE COHERENT-LIGHT FROM A CONTINUOUS-WAVE SEMICONDUCTOR-LASER USING AN ORGANIC CRYSTAL-CORED FIBER

Efficient frequency doubling of a continuous-wave semiconductor laser was attained by using a nonlinear optical fiber with a single crystal core of an organic 3,5-dimethyl-1-(4-nitrophenyl)pyrazole. The second-harmonic power generated with a 15 mm length of the fiber reached 0.16 mW from the incident 16.6-mW fundamental laser power at 884 nm. Nonlinear optical properties of the crystal and a fabrication technique of the fiber are also reported.