Patent ID: 7371013
Filing Date: 2008-05-13
Classification: G02B

Abstract:
1. A laser apparatus comprising: one or more semiconductor lasers which emit one or more laser beams; an optical fiber; an optical condensing system which condenses said one or more laser beams emitted from said one or more semiconductor lasers, and makes the one or more laser beams enter said optical fiber from a light-entrance end of the optical fiber; a package which contains said optical condensing system and said one or more semiconductor lasers, and fixedly holds said optical fiber in such a manner that said light-entrance end faces said optical condensing system; and a fixing structure which is arranged between said optical condensing system and said package for fixing the whole or a part of the optical condensing system to the package, which has at least one guide surface extending in at least one of first and second directions respectively parallel and perpendicular to a core axis of the optical fiber at said light-entrance end, and which allows sliding movement of the whole or said part of the optical condensing system along the guide surface before fixing the whole or said part of the optical condensing system to the package, wherein said fixing structure comprises, wherein the optical condensing system and the holder have respective reference surfaces each of which has an arithmetic average roughness Ra of less than 0.08 micrometers.