High channel density wavelength division multiplexer with defined diffracting means positioning

摘要: A wavelength division multiplexer/demultiplexer having optical path lengths between a fiber array and Fourier transform lens, dispersion grating the lens equal to focal length of lens. The reduce losses due angular acceptance mismatch in multiplexer. Close orientation about axis use holographic reduces other system. Multi-exposure gratings enable for extremely broad-band simultaneous transmission reflection operation. Individual Bragg plane sets recorded are dedicated operate efficiently on discrete ranges.