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US 10,705,407 B2Granted
Speckle reduction in photonic phased arrays
AssigneeAnalog Photonics LLC
InventorsEhsan Hosseini, Michael Watts, Peter Russo
Life of this patent
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Abstract
Aspects of the present disclosure describe systems, methods, and structures providing speckle reduction in photonic phased array structures.
Claims19
An optical phased-array device comprising:
- an array of phase-controlled elements;
- a binary-tree optical distribution network configured such that each individual phase-controlled element of the array is located at a leaf in the binary-tree optical distribution network;
- a M×N coupler positioned at a node of the binary-tree optical distribution network, where M and N are both >1;
- and
- two or more optical detectors, each individually coupled to one of two outputs of the M×N coupler;
- wherein the two or more optical detectors are configured to detect backscattered light received by the phase-controlled elements.
3 more elements
An optical phased-array device comprising:
- a first array of phase-controlled elements;
- a first binary-tree optical distribution network configured such that each individual phase-controlled element of the first array is located at a leaf in the first binary-tree optical distribution network;
- a first M×N coupler positioned at a root of the first binary-tree optical distribution network, where M and N are both >1 for the first M×N coupler;
- a first pair of two optical detectors, each optical detector individually coupled to one of two outputs of the first M×N coupler;
- a second array of phase-controlled elements;
- a second binary-tree optical distribution network configured such that each individual phase-controlled element of the second array is located at a leaf in the second binary-tree optical distribution network;
- a second M×N coupler positioned at a root of the second binary-tree optical distribution network, where M and N are both >1 for the second M×N coupler;
- a second pair of two optical detectors, each optical detector individually coupled to one of two outputs of the second M×N coupler;
- and
- a local oscillator operatively connected to each individual optical detector of the first and second pairs of optical detectors;
- wherein the optical detectors are configured to detect backscattered light received by the phase-controlled elements.
8 more elements
Dependencies are inferred from the claim text.