6.5-W, 532-nm radiation by cw resonant external-cavity second-harmonic generation of an 18-W Nd:YAG laser in LiB(3)O(5).

We report 6.5 W of TEM(00) cw 532-nm radiation generated by external resonant doubling in a LiB(3)O(5) crystal. An 18-W, cw, injection-locked single-frequency Nd:YAG laser was used to generate 532-nm second-harmonic output with a 3-dB heterodyne linewidth of 15 kHz.

Optical Kerr switch using elliptical-core two-mode fiber.

A new optical-optical switching technique is proposed and demonstrated with a probe-pump scheme, utilizing nonlinear differential phase shift between two spatial modes in a highly elliptical-core fiber. The probe beam is switched from one intensity-lobe position of the fiber output radiation pattern to the other in a 33-m-long fiber at a pump power of 1.6 W.