David E Kerr

US Patent:

20100080553, Apr 1, 2010

Filed:

Sep 29, 2008

Appl. No.:

12/239857

Inventors:

David Kerr - Ellicott City MD, US
Mark Laliberte - Columbia MD, US
Avery Van Gieson - Laurel MD, US
John Lai - Fulton MD, US
Kim Jepsen - Ellicott City MD, US
Wei Lu - Drive Bear, DE
Yan Han - Laurel MD, US
Marc Placidet - Columbia MD, US
Ulrik Gliese - Columbia MD, US
David Copeland - Silver Spring MD, US
Guangning Yang - Clarksville MD, US

International Classification:

H04B 10/00

US Classification:

398 5

Abstract:

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.