Patent ID: 6141477
Filing Date: 2000-10-31
Classification: H01S

Abstract:
A semiconductor optical amplification element having an optical waveguide which includes a core layer formed from an active layer acting as an optical amplification medium and amplifies and outputs an optical signal without electrically converting the optical signal wherein a light reflection factor on an inputting side end of said element for an optical signal is lower than a light reflection factor on an outputting side end of said element, and further wherein said optical waveguide is a striped optical waveguide and is formed in an inclined relationship from a direction of a normal to an end facet of said element and besides has, in the proximity of the opposite ends of said element, window regions in which the optical waveguide structure is terminated, and the window region on the optical signal inputting side is longer by more than 20 .mu.m than the window region on the optical signal outputting side.