COMPOSITE MODULE FOR OPTICAL FIBER AMPLIFIER

摘要

A composite module for an optical fiber amplifier which is capable of efficiently radiating heat generated at a Peltier element to outside of the module, in which an interference film filter component and a board are fixed to each other rigidly for a long period of time, and in which lateral offset of an optical axis between an LD element and the interference film filter component is further reduced. A portion of a board (1) where a Peltier element (12) is fixed in a high thermal conductive portion made of Cu or a Cu-W alloy. At least a part of a base (11) is a low thermal conductive portion made of a Fe-Ni-Co alloy, a Fe-Ni alloy, a Fe-Ni-Cr alloy, a Fe-Cr alloy, or stainless steel. An interference film filter component (5) is fixed to the low thermal conductive portion of the base (11) by laser beam welding.