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US 10,951,964 B2Granted
Reduced crosstalk photonic switch
AssigneeJuniper Networks, Inc.
InventorJonathan Edgar Roth
Life of this patent
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Abstract
Described are various configurations of reduced crosstalk optical switches. Various embodiments can reduce or entirely eliminate crosstalk using a coupler that has a power-splitting ratio that compensates for amplitude imbalance caused by phase modulator attenuation. Some embodiments implement a plurality of phase modulators and couplers as part of a dilated switch network to increase overall bandwidth and further reduce potential for crosstalk.
Claims20
A method for routing light using an optical switch, the method comprising:
- receiving light at the optical switch, the optical switch having a physical shape that compensates for attenuation differences of internal light in the optical switch;
- generating modulated light using an optical modulator in the optical switch, the modulated light exhibiting attenuation caused by the optical modulator;
- and
- coupling the modulated light using the optical switch such that constructive interference occurs for a first output port of the optical switch and destructive interference occurs for a second output port of the optical switch due to the physical shape of the optical switch.
1 more element
An optical switch for routing light, the optical switch comprising:
- an input port to receive the light;
- a first output port;
- a second output port;
- and
- an optical modulator configured to generate modulated light, the modulated light exhibiting attenuation caused by the optical modulator, the optical switch having a physical shape that compensates for attenuation differences by causing constructive interference occurs for a first output port of the optical switch and destructive interference occurs for a second output port of the optical switch due to the physical shape of the optical switch.
2 more elements
Dependencies are inferred from the claim text.