Patent ID: 6895031
Filing Date: 2005-05-17
Classification: G02B,H01L

Abstract:
1. A light-emitting device comprising: a fiber stub part comprising a grating fiber having one end, other end and a diffraction grating, and a ferrule having one pair of end faces; a semiconductor optical amplifying device having a light-reflecting face and a light-emitting face which is optically coupled to one end of said grating fiber; a bench having first, second and third regions arranged along a given axis, and an external cavity comprising a face of the semiconductor optical amplifying device and the diffraction grating of the grating fiber; said grating fiber having a first part and a second part that are provided between said one end and said other end, said ferrule being disposed in said first part, the other end of said grating fiber being exposed at one of one pair of end faces of said ferrule, said first region of said bench having a ferrule supporting part extending along a given axis for supporting said ferrule, said second region having an optical fiber supporting part extending along said given axis for supporting said grating fiber, and said third region having a device supporting part on which said semiconductor optical amplifying device is mounted, wherein said bench has a positioning face that intersects said given axis between said second region and said third region, and that contacts said one end of said grating fiber, whereby said positioning face determines a resonator length.