Patent ID: 7572068

Claim:
A laser module comprising: a chassis having a light-output-window from which one or more laser beams are outputted, and a transparent member holder disposed outside said light-output window, such that said one or more laser beams are transmitted through said transparent member holder; a hermetically sealed package fixed to said chassis; one or more semiconductor laser elements which are arranged in said hermetically sealed package, and emit said one or more laser beams; a transparent member, which is larger than said light-output window and covers said light output window, and is removeably disposed in said transparent member holder; an optical fiber which has a light-entrance end face, and is arranged outside said chassis so that the light-entrance end face is in contact with a light-output face of said transparent member, wherein said optical fiber is detachably attached to said chassis; and an optical condensing system which is arranged inside said chassis, and makes said one or more laser beams pass through said transparent member and be condensed on said light-entrance end face; wherein said light output window is narrower than said transparent member holder, such that a step is formed between said light output window and said transparent member holder by the difference in size therebetween; wherein, when said transparent member is disposed in said transparent member holder, a light-input face of said transparent member is in contact with said step, thus restricting movement of said transparent member and said optical fiber along the optical axis toward said light output window.