CONTROLLED OPTICAL DEMULTIPLEXER Russian patent published in 2009 - IPC H04J14/02 

FIELD: physics.

SUBSTANCE: controlled optical demultiplexer includes a multi-stage structure of optical filters, made with possibility of controlled adjustment of transmission coefficients, as well as a controller for controlling adjustment of transmission coefficients of optical filters. The optical filters used are single-stage asymmetrical Mach-Zehnder interferometres and/or two-stage asymmetrical Mach-Zehnder interferometres and/or multi-stage asymmetrical Mach-Zehnder interferometres. Electro- and thermo-optical phase shift devices serve for controlling adjustment of transmission coefficients of the optical filters. The multiplexer can made using integrated optical technology in form of a monolithic solid-state device.

EFFECT: demultiplexing channels in fibre-optic communication system with wavelength-division multiplexing of channels, optical frequencies of which can be adjusted at constant spectral interval between neighbouring channels Δv.

7 cl, 9 dwg, 2 tbl