Method for transmitting additional optical signals in the...

Details Method for transmitting additional optical signals in the... Method for transmitting additional optical signals in the...

2005-08-30

2005-08-30

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Raman or brillouin process

C359S341300

Reexamination Certificate

active

06937386

ABSTRACT:
The invention relates to the transmission of optical signals (C-Bein,L-Bein) in conventional transmission bands, especially C-bands and L-bands, and of additional optical signals (S+-Bein) in the S+-band by means of an optical fiber (OF). At least one optical pump signal (ps1, ps2) is coupled into the optical fiber (OF) for amplifying the additional optical signals (S+-Bein) by means of the Raman effect, whereby said additional signals are transmitted in the S+-band. The wavelength of the at least one optical pump signal (ps1, ps2) is situated in the wave range of 1,320 nm to 1,370 nm.

REFERENCES:
patent: 6163636 (2000-12-01), Stentz et al.
patent: 6501593 (2002-12-01), Akasaka et al.
patent: 6618192 (2003-09-01), Islam et al.
patent: 2001255563 (2001-09-01), None
patent: WO 99/49580 (1999-09-01), None
Kani et al. —Wideband and flat gain optical amplification from 1460 to 1510 nm by serial combination of a thulium doped fluoride fibre amplifier and fibre Raman amplifier pp. 1004-1006.
Kani et al. “Triple Wavelength Band WDM Transmission Over Cascaded Dispersion Shifted Fibers”, pp. 1506-1508.
Kani et al “Wavelength band nonlinear interactions and their suppression in multiwavelength band WDM transmission systems” pp. 2249-2260.
Kani et al. “Trinal wavelength band WDM transmission over dispersion shifted fibre” pp. 321-322.

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