MULTI-WAVELENGTH SELECTOR

摘要

A multi-wavelength selection device is provided to select a multi-wavelength optical signal, or desirable plural single-wavelength optical signals from a light source by using a modulation period diffraction grating, and to output the selected optical signal through a single input/output waveguide. A multi-wavelength selection device is composed of a first waveguide(210) for receiving a multi-wavelength optical signal comprising the M number of single-wavelength optical signals and outputting the N number of single-wavelength optical signals in the input direction of the multi-wavelength optical signal and a second waveguide(220) connected with the first waveguide. The multi-wavelength optical signal is flatly spread and transmitted through one end of the second waveguide. A modulation period diffraction grating(230) is formed on the other end of the second waveguide to reflect the N number of single-wavelength optical signals so that each single-wavelength optical signal forms focal points at one end and generates constructive interference.