Patent ID: 7296939

Claim:
A laser module comprising: one or more semiconductor laser elements which emit one or more divergent laser beams; one or more collimator lenses which collimate said one or more divergent laser beams to obtain one or more collimated laser beams; a condensing lens which condenses said one or more collimated laser beams, and make the one or more collimated laser beams converge at a convergence position; an optical fiber which has a light-entrance end face and is arranged in such a manner that said convergence position is located on the light-entrance end face; a first package which contains said one or more semiconductor laser elements and said one or more collimator lenses, does not contain said condensing lens and said light-entrance end face, and is hermetically sealed; a second package which contains said condensing lens, is hermetically sealed, and has lower sealing performance than said first package; and a third package, provided outside said second package, wherein the third package contains the light entrance end face of said optical fiber and does not contain said condensing lens.