| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an optical reception module that is compact and excellent in alignment accuracy even when light of a multiplexing wavelength is added to increase a transmission volume.SOLUTION: An optical reception module 1 comprises: a receptacle part 10 to which an optical fiber is connected; a package part 20 that stores a light reception element and an optical component; a terminal part 27 that performs an electric connection to an external circuit; and an optical branching filter 30 that receives a plurality of signal light subjected to wavelength multiplexing and different in a wavelength, and branches the plurality of signal light into the signal light, respectively. The optical branching filter 30 has an integral wavelength separation block laminate in which a plurality of wavelength separation blocks 31 and 32 are laminated, and the respective wavelength separation blocks are configured so as to branch signal light in a prescribed wavelength band. A wavelength selection filter is provided on an inclination surface formed on an incident part side of each wavelength separation block, and at each wavelength separation block, light in a wavelength band capable of branching is configured to be taken in.</p> |
