LATENCY MEASUREMENT IN OPTICAL NETWORKS
First Claim
Patent Images
1. A device, comprising:
- an optical source to generate an optical signal;
an optical modulator to modulate the optical signal based on a modulation signal;
an output port to output the modulated optical signal to a test optical path;
an input port to receive a return optical signal following propagation through the test optical path; and
latency calculating logic to calculate an optical latency for the test optical path based on the modulation signal and the return optical signal.
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Abstract
A device for measuring optical latency in a test path includes an optical source to generate an optical signal. An optical modulator modulates the optical signal based on a modulation signal. An output port outputs the modulated optical signal to the test path. An input port receives a return optical signal following propagation through the test path. Latency calculating logic calculates the optical latency for the test path based on the modulation signal and the return optical signal.
53 Citations
20 Claims
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1. A device, comprising:
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an optical source to generate an optical signal; an optical modulator to modulate the optical signal based on a modulation signal; an output port to output the modulated optical signal to a test optical path; an input port to receive a return optical signal following propagation through the test optical path; and latency calculating logic to calculate an optical latency for the test optical path based on the modulation signal and the return optical signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system, comprising:
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a latency measuring tool; a optical path to be tested; and a loop back jumper for connecting an outgoing channel in the optical path to a return channel in the optical path, where the latency measuring tool, further comprises; a tunable laser to generate an optical beam having a selected wavelength; an optical modulator to modulate the optical beam based on a modulation signal; an output port to output the modulated optical beam to the outgoing channel; an input port to receive a return optical beam from the return channel; and latency calculating logic for calculating an optical latency for the optical path based on the modulation signal and the return optical beam. - View Dependent Claims (16, 17, 18, 19)
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20. A method, comprising:
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generating an optical beam having a selected wavelength; modulating the optical beam based on a modulation signal having a selected pulse width and a selected pulse period to generate a modulated optical beam; outputting the modulated optical beam on an optical path; receiving a return optical beam from the optical path; calculating an optical latency of the optical path based on the modulation signal and the return optical beam; and outputting the calculated optical latency.
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Specification