Patent Number: 6,445,492

Title: Reduction of four-wave mixing in raman amplified optical transmission systems

Abstract: A Raman amplified transmission includes at least two pump sources to provide amplification to optical signals residing in the C-band (1530-1562 nm) and L-band (1574-1604 nm). The pump signals are chosen so as to provide for a relatively flat and wide composite gain spectrum with a width at least 50% greater than that generated by a monochromatic pump, while also chosen so as to prevent any four-wave mixing products from being in either the C- or L-bands.

Inventors: Nielsen; Torben N. (Monmouth Beach, NJ), Rottwitt; Karsten (Basking Ridge, NJ), Stentz; Andrew John (Clinton, NJ)

Assignee: Lucent Technologies Inc.

International Classification: H01S 3/30 (20060101); H04B 10/17 (20060101); H04B 10/18 (20060101); H01S 003/00 ()

Expiration Date: 09/03/2019