CENTRALIZED AUTOMATIC BIAS CONTROL SYSTEM AND METHOD FOR MULTIPLE OPTICAL MODULATORS
First Claim
1. A computer implemented method for centralized automatic bias control for a plurality of modulators, comprising:
- coupling, using a coupler, output of each of the plurality of modulators to generate a combined modulator output;
inserting, using a pilot insertion device, a pilot tone into each of the plurality of modulators, wherein a different pilot tone frequency is inserted for each of the plurality of modulators;
monitoring, using a monitoring device, power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal, based on a threshold condition, for each of the plurality of modulators;
adjusting, using an adjuster device, the current modulator bias determined to be sub-optimal for each of the plurality of modulators; and
iterating the monitoring and adjusting until the threshold condition has been met.
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Accused Products
Abstract
A system for centralized automatic bias control for a plurality of modulators, including a coupler for coupling output of each of the plurality of modulators to generate a combined modulator output. A pilot insertion device inserts a pilot tone into each of the plurality of modulators such that a different pilot tone frequency is inserted for each of the plurality of modulators. A monitoring device iteratively monitoring power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal for each of the plurality of modulators, and an adjuster device iteratively adjusts the modulator bias for each of the plurality of modulators for which the current modulator bias is determined to be sub-optimal until a threshold condition has been met.
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Citations
20 Claims
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1. A computer implemented method for centralized automatic bias control for a plurality of modulators, comprising:
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coupling, using a coupler, output of each of the plurality of modulators to generate a combined modulator output; inserting, using a pilot insertion device, a pilot tone into each of the plurality of modulators, wherein a different pilot tone frequency is inserted for each of the plurality of modulators; monitoring, using a monitoring device, power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal, based on a threshold condition, for each of the plurality of modulators; adjusting, using an adjuster device, the current modulator bias determined to be sub-optimal for each of the plurality of modulators; and iterating the monitoring and adjusting until the threshold condition has been met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for centralized automatic bias control for a plurality of modulators, comprising:
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a coupler for coupling a respective output of each of the plurality of modulators to generate a combined modulator output; a pilot insertion device for inserting a pilot tone into each of the plurality of modulators, wherein a different pilot tone frequency is inserted for each of the plurality of modulators; a monitoring device for iteratively monitoring power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal for each of the plurality of modulators; an adjuster device for iteratively adjusting the current modulator bias determined to be sub-optimal for each of the plurality of modulators until a threshold condition has been met. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer-readable storage medium comprising a computer readable program, wherein the computer readable program when executed on a computer causes the computer to perform the steps of:
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coupling, using a coupler, output of each of the plurality of modulators to generate a combined modulator output; inserting, using a pilot insertion device, a pilot tone into each of the plurality of modulators, wherein a different pilot tone frequency is inserted for each of the plurality of modulators; monitoring, using a monitoring device, power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal for each of the plurality of modulators; adjusting, using an adjuster device, the current modulator bias determined to be sub-optimal for each of the plurality of modulators; and iterating the monitoring and adjusting until a threshold condition has been met. - View Dependent Claims (18, 19, 20)
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Specification