Laser module and method of manufacturing the same

摘要

A laser module in which a fiber grating fixed in a ferrule is used as a distributed reflector to stabilize the oscillation characteristic of a laser by maintaining the original reflection characteristics of the fiber grating. Only one or more portions of a fiber grating that do not include a grating, namely, a non-grating forming portion(s), are fixed to a ferrule by solder. The portion of the fiber that includes the grating, i.e., the grating forming portion, is not subject to metal deposition. Thus the deformation and/or degradation of a grating due to heat from the solder is decreased or completely avoided.