Infinera Corporation

Yan Han

Kim S Jepsen

Guangning Yang

David J Copeland

Brian Shia

David Kerr

Marc Placidet

Ulrik Gliese

Avery Van Gieson

Mark LaLiberte

John Lai

Wei Lu

A communication system may include a first control circuit to detect a break on a first optical link; a first optical source to supply a first optical signal on a second optical link in response to detecting the break on the first optical link, the first optical signal propagating in a first direction on the second optical link; a second control circuit to detect a presence of the first optical signal on the second optical link, and output a control signal in response to detecting the presence of the first optical signal; and a second optical source to supply a second optical signal on the second optical link, the second optical signal propagating in a second direction opposite the first direction, where the Raman pump is disabled in response to the control signal.

Automatic laser shutdown and recovery in response to a link break

A controller is configured to determine a first amount of current associated with a first power level. The controller is configured further to generate a digital pulse signal based on the first amount of current, where the digital pulse signal may have a second power level and an associated duty cycle. The controller is configured further to convert the digital pulse signal into a second amount of current and output the second amount of current as a pulse signal based on the duty cycle.

Optical amplifier controller

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Laurel, MD, United States of America

Yan Han