REPEATED WAVELENGTH CONVERSION OF 10 GB S SIGNALS AND CONVERTED SIGNAL GATING USING WAVELENGTH-TUNABLE SEMICONDUCTOR-LASERS/

Repeated wavelength conversion of 10 Gb/s pseudorandom nonreturn-to-ze ro signals is demonstrated using semiconductor lasers that can be tune d wavelength over a broad range. Error-free tunable wavelength convers ion with a very low power penalty can be achieved in both first and se cond wavelength conversion over a broad wavelength range from 1.486-1. 573 mu m. The converted signal can be switched rapidly within this wav elength region. High-speed converted signal gating controlled by adjus ting the bias current to the device active region is also demonstrated .