Histogram based optimization for optical modulation
AssigneeMarvell Asia Pte Ltd
InventorsTodd Rope, Hari Shankar, Radhakrishnan L. Nagarajan
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Abstract
The present invention is directed to communication systems and methods. In a specific embodiment, the present invention provides an optical receiver that receives a data stream from an optical transmitter. The optical receiver determines a histogram contour parameter using the data stream and inserts the histogram contour parameter into a back-channel data segment, which is then transmitted to the optical transmitter. The optical transmitter changes its data transmission setting based on the histogram contour parameter. There are other embodiments as well.
Claims20
An optical receiver device comprising:
- an optical interface for receiving incoming optical signals from a transmitter;
- a splitter configured to split the incoming optical signals into a first optical signal and a second optical signal;
- a first optical multiplexer configured to multiplex the first optical signal to provide a first multiplexed optical signal, the first optical multiplexer being configured to operate using a first parameter;
- a second optical multiplexer configured to multiplex the second optical signal to provide a second multiplexed optical signal;
- a first photo detector configured to process the first multiplexed optical signal;
- an optical transimpedance amplifier (TIA) configured to convert an output optical signal from the first photo detector to a first electrical signal;
- and
- a control module configured to generating a plurality of parameters based on backchannel data, the plurality of parameters including the first parameter, the backchannel data being associated with a signal quality value associated with a histogram characterizing performance characteristics of the transmitter, the signal quality value being calculated using a quadratic fit of a histogram and a first order coefficient of the quadratic fit.
An optical receiver device comprising:
- an optical interface configured to receive incoming optical signals from a transmitter, the incoming optical signals comprising backchannel data;
- a control module comprising a detector for detecting the backchannel data and configured to generate a plurality of parameters based on the backchannel data, the plurality of parameters including a first parameter, the backchannel data being associated with a signal quality value associated with a histogram characterizing performance characteristics of the transmitter, the signal quality value being calculated using a quadratic fit of the histogram and a first order coefficient of the quadratic fit;
- a first delay line interferometer (DLI) configured to multiplex a first optical signal based on the incoming optical signals to provide a first multiplexed optical signal, the first DLI being configured to operate using the first parameter;
- a first photo detector configured to process the first multiplexed optical signal;
- and
- an optical transimpedance amplifier (TIA) configured to convert an output optical signal from the first photo detector to a first electrical signal.
A method for optimizing optical data transmission, the method comprising:
- receiving an incoming optical signal from a transmitter;
- detecting backchannel data in the incoming optical signal;
- obtaining a histogram contour parameter encapsulated in the backchannel data, the histogram contour parameter being based on a first order coefficient of a quadratic fit;
- generating a plurality of parameters using at least the histogram contour parameter, the plurality of parameters including a first parameter and a second parameter;
- and
- processing the incoming optical signal by a first multiplexer using at least the first parameter.
Dependencies are inferred from the claim text.