Automated optical link power control

Details Automated optical link power control Automated optical link power control

2006-06-22

2009-12-01

Bolda, Eric (Department: 3663)

Optical communications

Transmitter and receiver system

Passive system

Reexamination Certificate

active

07627254

ABSTRACT:
A system, apparatus and method are described for controlling the gain across one or more amplifier nodes within an optical span. In one embodiment, a fast local amplifier constant gain control loop is provided that maintains a constant gain across an amplifier node for each of the channels within an optical signal. A slow link level gain setting control loop is provided to set and/or adjust the target gain on the amplifier node(s). A gain adjust sequence is performed by the slow link level gain setting control loop to adjust the target gain(s) in response to various events and mechanisms. A “time of flight” protection method is also provided to ensure consistency between the fast local amplifier gain control loop and the slow link level gain setting control loop.

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Srivastava et al. Fast-Link Control Protection of Surviving Channels in Multiwavelength Optical Networks. IEEE Photonics Technology Letters, vol. 9. No. 12. Dec. 1997.

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