Demultiplexer devices and multi-reflecting multiplexer equipment

摘要

(57) by the optical path length difference generating element for coupling the multiplexed light path propagated independently and a single optical channel for propagating an optical signal groups having different wavelengths SUMMARY A number, signal groups having different wavelengths are, the optical signal group I is dispersed according to wavelength of each signal. The optical path length difference generating element, is formed by reflection stack having a multiplicity of reflecting surfaces for reflecting in succession some of the energy of the signal of the signal groups having different wavelengths along the optical paths of different lengths I can be.