Multi-channel optical module
Crosstalk between adjacent channels is suppressed when monitoring output power. A multi-channel optical module for multiplexing and outputting a plurality of wavelength channels, which includes a plurality of light sources each having a different wavelength, a plurality of collimator lenses coupled to an output of each of the plurality of light sources, a beam splitter coupled to an output of each of the plurality of collimator lenses, a plurality of monitor PDs for monitoring optical power branched from the beam splitter, and a shielding plate installed between the plurality of collimator lenses.
1 . A multi-channel optical module for multiplexing and outputting a plurality of wavelength channels, comprising:
a plurality of light sources each having a different wavelength;
a plurality of collimator lenses coupled to an output of each of the plurality of light sources;
a beam splitter coupled to an output of each of the plurality of collimator lenses;
a plurality of monitor PDs for monitoring optical power branched from the beam splitter; and
a shielding plate integrated in the beam splitter and installed in an optical path of the light source coupled through each of the collimator lenses and configured to divide an optical thin film of the beam splitter.
2 . The multichannel optical module according to claim 1 , wherein the shielding plate is a metal film.
3 . The multi-channel optical module according to claim 1 , wherein
a reflecting film or a light shielding film is formed on a side surface of the shielding plate.
4 . The multi-channel optical module according to claim 1 , wherein the shielding plate is higher than a height of the beam splitter.