Patent ID: 7466017

Claim:
A laser apparatus comprising: one or more semiconductor lasers which emit one or more laser beams; an optical fiber; an optical condensing system which is constituted by one or more optical components, 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; and a package which fixedly 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; wherein said one or more optical components are directly or indirectly fixed to said package with a first layer of adhesive, said one or more semiconductor lasers are directly or indirectly fixed to said package with solder, and the first layer of adhesive has a thickness of less than or equal to 1 micrometer, and preferably a thickness within a range of 0.2 micrometers to 1 micrometer after the first layer of adhesive is dried.