Semiconductor laser module

A semiconductor laser module comprising:

• a semiconductor laser that outputs laser light;
• an optical fiber that guides the laser light;
• a lens that couples the laser light, which is output from the semiconductor laser, with the optical fiber;
• a base that is substantially tabular in shape and that has each of the (i) semiconductor laser, (ii) the optical fiber, and (iii) the lens fixed thereon either directly or indirectly;
• and
• a housing which houses the base and fixes the base either directly or indirectly, wherein
• the optical fiber is disposed on an opposite side of the semiconductor laser with respect to the lens,
• a rear face of the base that is on a side that is fixed either directly or indirectly to the housing includes (i) a junction plane, which is joined to the housing either directly or indirectly, and (ii) a detachment plane, which is detached to remain unfixed from the housing,
• the lens is fixed on a front face of the base in an area that is opposite to the junction plane, and
• the base is a tabular member having a step difference between the junction plane and the detachment plane.