Raman amplifier and method for pumping a Raman amplifier

Details Raman amplifier and method for pumping a Raman amplifier Raman amplifier and method for pumping a Raman amplifier

2006-05-09

2006-05-09

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Raman or brillouin process

Reexamination Certificate

active

07042633

ABSTRACT:
A Raman amplifier (10) including at least one amplifying fiber (12) and a coupler (14) for coupling at least first (16) and second (18) pump laser modules to the amplifying fiber (12), the first pump laser module (16) including a frequency discriminator (24) for selecting an optical frequency to be emitted with an optical power exceeding an optical power of remaining optical frequencies that are also emitted by the first pump laser module (16). The first optical frequency is spaced apart from a local maximum (28; 36; 48) in optical power of the remaining optical frequencies, and the second pump laser module (18) emits at an optical frequency one Stokes-frequency above the frequency of the local maximum (28; 36; 48). The first optical frequency and the frequency of the local maximum are chosen on Stokes-frequency above the signal frequency range. As a consequence, the Raman gain provided in the Raman amplifying fiber12is broadened.

REFERENCES:
patent: 6320884 (2001-11-01), Kerfoot, III et al.
patent: 6384962 (2002-05-01), Foursa et al.
patent: 6480326 (2002-11-01), Papernyi et al.
patent: 6707598 (2004-03-01), Krummrich
patent: 2002/0101649 (2002-08-01), Islam
patent: 2002/0109906 (2002-08-01), Grubb et al.
patent: 001225666 (2002-07-01), None
patent: 001233490 (2002-08-01), None
patent: WO 02/07274 (2002-01-01), None

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