Status link for multi-channel optical communication systems

Details Status link for multi-channel optical communication systems Status link for multi-channel optical communication systems

2008-02-28

2011-10-04

Liu, Li (Department: 2613)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S030000, C398S032000, C398S033000, C398S038000, C398S180000, C398S181000

Reexamination Certificate

active

08032021

ABSTRACT:
A robust and redundant status link is established by a first multi-channel optoelectronic device with a second multi-channel optoelectronic device in a multi-channel communication link. Transmitter bias currents are effectively modulated with a status link modulation signal representative of status data and subsequently modulated with primary data modulation signals. The resulting signals are transformed into optical signals and transmitted over the link as main communication links combined with a status link. At the second device, the optical signals are received and converted to electrical signals. The receipt of the optical signals creates multiple receiver bias currents, which may be monitored to detect the status link modulation signal. The second device may adjust various operating parameters in response to the information conveyed by the status link. For instance, devices can use status links to operate above nominal eye safety limits and/or to adjust transmit power to compensate for degradation effects.

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