Wavelength converter for an ultra-high speed optical signal operating without pumped light, includes a semiconductor fibre-optic ring-type laser that uses a semiconductor optical amplifier as a laser-amplifying medium

摘要

A wavelength converter has a mode-locking laser (100). An optical dimmer (120) dims the optical output signal for an optical fibre. First (140) and second (260) polarization controls adapt polarization status to get maximum four wave mixing efficiency. An optical insulator (180) transmits the optical wavelength of an optical fibre. A semiconductor optical amplifier (200) operates as a laser-amplifying medium or wavelength converter.