Optical switch apparatus and optical switching system
AssigneeFujitsu Limited
InventorsYutaka Kai, Yasuhiko Aoki, Eric Gouardes, Yoshiaki Nakano
Life of this patent
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Abstract
In an optical switch apparatus which continuously carries out the route switching on frame signal light inputted from various routes while eliminating differences in output power value, a first delaying unit, which is interposed between a first branching unit and an input terminal, delays the input of the frame signal light to a switch module until the drive voltage supply control on the frame signal light in a drive voltage supply control unit reaches a stable condition.
Claims19
An optical switch apparatus designed to output frame signal light from a plurality of input ports to one of a plurality of output ports in a switching fashion, comprising:
- a switch module for deflecting frame signal light from each of input terminals associated with said input ports through the use of supply of a drive voltage to output said frame signal light to one of output terminals associated with said plurality of output ports in a switching fashion;
- a plurality of first branching units interposed between said input ports and said input terminals for carrying out a branch on a portion of said frame signal light from said input ports to said switch module;
- a plurality of first input power monitors for monitoring optical power of the branched frame signal light from each of said first branching units;
- a drive voltage supply control unit for controlling supply of a drive voltage to said switch module on the basis of a result of the monitor of said frame signal light from each of said first input power monitors so as to control an optical route for said frame signal light;
- and
- first delaying units each for delaying input of said frame signal light to said switch module until the drive voltage supply control on said frame signal light in said drive voltage supply control unit reaches a stable condition, with each of said first delaying units being interposed between said first branching units and said input terminals, respectively.
An optical switching system made up of a transmission node for transmitting frame signal light in which transmitted data is modulated, a reception node for receiving said frame signal light from said transmission node through a network and an optical switching node for setting a path provided on said network, through which said frame signal light propagates, in a switching fashion, wherein said optical switching node comprises a monitoring unit for monitoring optical power of said frame signal light inputted from said transmission node and a power adjusting unit for variably adjusting optical power of frame signal light to said reception node, and
- said transmission node comprises a bit pattern processing unit for processing a bit pattern of the transmitted data to stabilize optical power of said frame signal light to be monitored by said monitoring unit and a frame signal light producing unit for producing frame signal light to be transmitted on the basis of the bit pattern processed by said bit pattern processing unit.
Dependencies are inferred from the claim text.