Patent ID: 6134250
Filing Date: 2000-10-17
Classification: H01S,H04B,H04J,H04Q

Abstract:
A wavelength-selectable ring laser comprisinga wavelength selection unit arranged for receiving an optical signal from an output of a Fabry-Perot optical amplifier and for outputting a selected one of a plurality of wavelength bands of the optical signal to said Fabry-Perot optical amplifier thereby forming a ring laser with said Fabry-Perot optical amplifier,said Fabry-Perot optical amplifier receiving the selected wavelength band, amplifying a predefined sub-band of the selected wavelength band, and outputting said amplified predefined sub-band to said wavelength selection unit such that said ring laser oscillates in a single axial mode, anda coupler connected in said ring laser so as to output said single axial mode optical signal from the ring laser.