Bidirectional multiplexer and demultiplexer based on single echelle waveguide reflection grating

摘要: PROBLEM TO BE SOLVED: To provide a bidirectional multiplexer and demultiplexer based on single waveguide reflection grating. SOLUTION: Wavelength multiplexed light from an input port 21a is fanned out towards echelle grating 26 22a. The branches outputs signals for each wavelength channel which angularly dispersed diffracted output 24a1 to 24aN through corresponding waveguides 23a1 23aN. inputted of 24b1 24bN are the 23b1 23bN. reflects multiplexes those into common 22b, thus taken 21b. By these operations, demultiplexing multiplexing operations can simultaneously be performed by using same 26.