Patent ID: 6684004
Filing Date: 2004-01-27
Classification: G02B,H04J

Abstract:
An optical demultiplexer device, comprising:a first optical demultiplexer circuit, including a first optical circulator having a first port, a second port and a third port, wherein multiplexed light is input into the first port, and the light input to the first port is output from the second port, and light input into the second port is output from the third port; a dispersion compensator having an input unit and an output unit, the dispersion compensator being coupled to the second port of the first optical circulator at an end of the input unit or output unit; a first optical filter coupled to another end of the input or output unit to reflect light having a specified wavelength and to transmit light having a wavelength other than the specified wavelength; a second optical circulator having a first port, a second port and a third port, wherein the light transmitted by the first optical filter is input to the first port of the second optical circulator; and a second optical filter coupled to the second port of the second optical circulator to reflect the light transmitted by the first optical filter having a specified wavelength, wherein the third port of the second optical circulator outputs a light from the second optical filter.