Optical switch
AssigneeFujitsu Limited
InventorsShinji Komiya, Tsukasa Takahashi
Life of this patent
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Abstract
An optical switch include a switch unit including a light reflection unit of which the reflection direction is changeable, the switch unit configured to optically connect an input port to an output port via the light reflection unit by changing the reflection direction of the light reflection unit; a determining light input unit configured to input into a first predetermined port a determining light for determining malfunctions in the light reflection unit; a light detection unit configured to detect the determining light from the output from a second predetermined port; and a malfunction determining unit configured to determine that abnormalities have occurred when the determining light is detected by the light detection unit.
Claims13
An optical switch comprising:
- a switch unit including a light reflection unit of which the reflection direction is changeable, the switch unit including a plurality of input ports and an output port and being configured to optically connect one or more of the input ports to the output port via the light reflection unit by changing the reflection direction of the light reflection unit;
- a determining light input unit configured to input, into a first predetermined port, a determining light for determining malfunctions in the light reflection unit;
- a light detection unit configured to detect the determining light output from a second predetermined port;
- and
- a malfunction determining unit configured to determine that abnormalities have occurred when the determining light is detected by the light detection unit.
An optical transmission device comprising:
- an optical switch including
- a switch unit that includes a light reflection unit of which the reflection direction is changeable, the switch unit including a plurality of input ports and an output port and being configured to optically connect one or more of the input ports to the output port via the light reflection unit by changing the reflection direction of the light reflection unit,
- a determining light input unit configured to input into a first predetermined port a determining light for determining malfunctions in the light reflection unit,
- a light detection unit configured to detect the determining light from the output from a second predetermined port;
- and
- a malfunction determining unit configured to determine that abnormalities of the light reflection unit have occurred when the determining light is detected by the light detection unit at a state in which control is performed to change the reflection direction of the light reflection unit.
An optical switch comprising:
- a plurality of input ports including
- a first input port to input a signaling light and
- a second input port to input a determining light;
- an output port;
- a reflection unit of which the reflection direction is changeable, configured to receive light from the plurality of input ports and reflect to the output port the light from the at least one of the plurality of input ports;
- a light detection unit configured to detect the determining light from the output port;
- a control unit configured to cause the reflection of the reflection unit to either adjust to a first reflection direction that connects the first input port to the output port, or to a second reflection direction that connects the second input port to the output port;
- and
- a malfunction determining unit configured to determine that abnormalities of the light reflection unit have occurred when the signaling light input into the second input port is detected by the light detection unit at a state in which the reflection direction of the reflection unit adjusts to the first reflection direction.
Dependencies are inferred from the claim text.