Patent ID: 6115375
Filing Date: 2000-09-05
Classification: H04Q

Abstract:
A multistage optical packet switching apparatus comprising:a self-duplication and amplification means including at least two interconnected symmetrical self electro-optic-effect devices, each device receiving an input optical signal transmitted from a unit switching module in a front stage, receiving an outside optical bias signal of constant intensity and an optical signal for detecting a state of a self electro-optic-effect device, performing self-duplication and amplification based on a difference in signal intensities of respective bits of the optical bias signal and the input optical signal, and generating a self-duplicated and amplified optical signal;a switching means having at least two interconnected symmetrical self electro-optic-effect devices, each device receiving the self-duplicated and amplified optical signal from said self-duplication and amplification means and an optical control signal for determining a destination for the input optical signal, and outputting the input optical signal by varying reflectance based on signal intensity of bits indicating an address to be output of bits of the self-duplicated and amplified optical signal; anda first unit switching module for receiving as input an optical signal having a relatively low reflectance among unit switching modules in back stage and outputting a meaningless optical signal through self-duplication and amplification; anda second unit switching module, receiving as input an optical signal having relative high reflectance among unit switching modules in back stage and generating an optical signal for transmission to a following state through self-duplification and amplification.