OPTICAL COUPLER WITH WAVELENGHT AND POLARIZATION MULTIPLEXERS

摘要

Disclosed is an optical coupler which has: a first wavelength-multiplexing means for wavelength-multiplexing first pumping light with a first linear polarization direction and a first wavelength and second pumping light with the first linear polarization direction and a second wavelength and for outputting first output light with the first linear polarization direction; a second wavelength-multiplexing means for wavelength-multiplexing third pumping light with a second linear polarization direction orthogonal to the first linear polarization direction and the first wavelength and fourth pumping light with the second linear polarization direction and the second wavelength and for outputting second output light with the second linear polarization direction; and a polarization-multiplexing means for polarization-multiplexing the first output light output from the first wavelength-multiplexing means and the second output light output from the second wavelength-multiplexing means.