Implementation and analysis of 3 dimensional sweeps for iq modulator calibration
AssigneeCiena Corporation
InventorsYing Gao, Yves Beaulieu, Fan Long
Life of this patent
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Abstract
Aspects of the subject disclosure may include, for example, applying a plurality of time-varying bias signals to bias inputs of a quad-parallel Mach-Zehnder (QPMZ) modulator, receiving output signals of the QPMZ modulator, wherein the output signals are produced by the QPMZ modulator responsive to the plurality of time-varying bias signals, and determining a biasing map, optical loss, and optical characteristics including extinction ratio and crosstalk for the QPMZ modulator based on the output signals of the QPMZ modulator. Other embodiments are disclosed.
Claims20
A method, comprising:
- applying, by a processing system including a processor, a plurality of time-varying bias signals to bias inputs of a quad-parallel Mach-Zehnder (QPMZ) modulator;
- receiving, by the processing system, output signals of the QPMZ modulator, wherein the output signals are produced by the QPMZ modulator responsive to the plurality of time-varying bias signals;
- and
- determining, by the processing system, one or more of a biasing map, power capability, or MZ structure non-idealities for the QPMZ modulator based on the output signals of the QPMZ 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:
- providing input digital data to a digital to analog converter;
- receiving, from the digital to analog converter, a dither signal, wherein the dither signal includes a fast signal, a mid signal and a slow signal;
- applying the fast signal, the mid signal and the slow signal to selected bias inputs of a quad-parallel Mach-Zehnder (QPMZ) modulator;
- iterating the fast signal, the mid signal and the slow signal among the selected bias inputs of the QPMZ modulator to identify bias values for operation of the QPMZ modulator;
- applying bias signals corresponding to the bias values for operation of the QPMZ modulator;
- and
- initiating operation of the QPMZ modulator.
Dependencies are inferred from the claim text.