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NvidiaGranted patentNetworks & wirelessInterest 4/10

Nvidia patents optical fiber link that uses hidden codes to check signal quality

Nvidia describes an optical communication system that sends data through fiber using different colors of light, known as wave division multiplexing. It adds a faint, coded signal below the normal noise level to monitor how much interference exists between the different data channels.

Why it mattersThis technique could help data centers and telecom providers detect and fix signal interference in high-speed fiber networks without interrupting the main data flow.

In the filing’s own words

An optical communication system includes at least one wave division multiplex (WDM) transmitter configured to generate WDM signals in multiple channels on a light guide, and a Code Division Multiple Access (CDMA) symbol generator coupled to modulate output of the WDM transmitter at a frequency below a noise floor of the WDM signals.

What exactly they claim (claim 1)

1. An optical transmitter comprising: at least one laser configured to generate a wave division multiplex (WDM) on a light guide; and a Code Division Multiple Access (CDMA) symbol generator coupled to modulate CDMA symbols on the light guide across a plurality of channels of the WDM; a detector configured to tap the light guide for a detected signal; and logic to identify from the detected signal a metric of crosstalk between the WDM channels.

Facts

Company
Nvidia (NVIDIA Corp.)
Official title
CDMA over WDM as a link management protocol
Patent number
US12750151B2
Application number
18438897
Filed
Feb 12, 2024
Granted
Sep 29, 2026
Inventors
2
Claims
17

Classified under

H04J 14/005 Electricity & electronicsH04J 14/02 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.