In-phase (i) / quadrature (q) correlation dither for modulator quadrature control
AssigneeCiena Corporation
InventorsShahab Oveis Gharan, Yves Beaulieu, Douglas McGhan, Kim Byron Roberts
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Abstract
Aspects of the subject disclosure may include, for example, obtaining two inputs xI and xQ based on a digital input signal, and causing a modulator to create two substantially orthogonal output dimensions I and Q based on the two inputs xI and xQ, by performing controlled introduction of a correlation between the two inputs xI and xQ for the modulator, and detecting a resulting output power of the modulator to facilitate operation of the modulator. Other embodiments are disclosed.
Claims20
A device, comprising:
- a modulator configured to output an optical signal;
- and
- a control system configured to cause the modulator to create two substantially orthogonal output dimensions, in-phase (I) and quadrature (Q), based on two inputs xI and xQ derived from a digital input signal, by:
- performing controlled introduction of a correlation between the two inputs xI and xQ for the modulator;
- and
- detecting a resulting output power of the modulator to facilitate operation of the modulator.
A method, comprising:
- obtaining, by a processing system including a processor, two inputs xI and xQ based on a digital input signal;
- and
- causing, by the processing system, a modulator to create two substantially orthogonal output dimensions, in-phase (I) and quadrature (Q), based on the two inputs xI and xQ, by:
- performing controlled introduction of a correlation between the two inputs xI and xQ for the modulator;
- and
- detecting a resulting output power of the modulator to facilitate operation of the modulator.
A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations, the operations comprising:
- obtaining two inputs xI and xQ based on a digital input signal;
- and
- causing a modulator to create two substantially orthogonal output dimensions, in-phase (I) and quadrature (Q), based on the two inputs xI and xQ, by:
- performing controlled introduction of a correlation between the two inputs xI and xQ for the modulator;
- and
- detecting a resulting output power of the modulator to facilitate operation of the modulator.
Dependencies are inferred from the claim text.