Optical communication system with co-propagating pump...

Details Optical communication system with co-propagating pump... Optical communication system with co-propagating pump...

H - Electricity

04

B

H04B 10/17 (2006.01) G02F 1/39 (2006.01) H01S 3/30 (2006.01)

Patent

CA 2335166

A fiber Raman amplifier is configured to use a co-propagating Raman pump source, which may be beneficial in a variety of system configurations (for example, in bidirectional communication systems). By carefully configuring the pump source characteristics, sufficient optical gain can be achieved in the co-propagating arrangement, the characteristics including: (1) using an optical pump power of at least 50mW, (2) having a relatively large spectral bandwidth within the pump (to suppress SBS); and (3) a frequency difference between all longitudinal pump modes of each pump laser being separated by at least the walk-off frequency between the pump laser frequency and the signal frequency, and all intense longitudinal modes between different pump lasers being separated by at least the electrical bandwidth of the communication system.

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