| 摘要 |
PROBLEM TO BE SOLVED: To realize a function efficiently multiplexing plural lights of narrow intervals between wavelengths and different wavelengths by providing a wavelength band selector and multiplexing the wavelength of light from pieces of light sources so as to output the wavelength-multiplexed light from an output port. SOLUTION: Light outputted from a light source 111 enters the port 1 of an optical circulator 20, is outputted from a port 2 to be reflected by a band reflecting filter 31 and is inputted to the port 2 again. Light from a light source 112 passes through the filter 31 and inputted to the port 2 of the circulator 20. Consequently, the synthesized light of output light from the light sources 111 and 112 is inputted to the port 2 of the circulator 20. Light from a light source 113 passed through a band reflecting filter 32 and is outputted to the port 4 from the port 3. After all, output light of the light sources 111 to 113 are superimposed and outputted from the port 4. |
