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OPTICAL DOMAIN EQUALIZATION FOR COHERENT OPTICAL RECEIVERS
OPTICAL DOMAIN EQUALIZATION FOR COHERENT OPTICAL RECEIVERS
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机译:相干光接收器的光学域均衡
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摘要
An optical coherent receiver includes an optical hybrid (OH) configured to mix signal and reference light, and two back-end optical ports. An optical equalizing network interconnects two 180° OH output ports with the two back-end optical ports so that each back-end optical port receives light from each of the two OH output ports. Optical signals from each of the two back-end optical ports are converted to electrical signals that are fed to a differential amplifier. Adjusting coupling ratios and/or optical delays in the optical equalizing network reduces an OSNR penalty of a lower-bandwidth differential amplifier.
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