Broadband Raman pre-amplifier for wavelength division multiplexe

Details Broadband Raman pre-amplifier for wavelength division multiplexe Broadband Raman pre-amplifier for wavelength division multiplexe

1998-10-05

2000-11-21

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359124, 359334, H01S 300

Patent

active

061511609

ABSTRACT:
An optical WDM transmission system. The arrangement includes a splitter for dividing a multiplexed optical signal having a prescribed bandwidth into a plurality of distinct sub-bands. The plurality of distinct sub-bands is received by a plurality of output paths, respectively, which direct the sub-bands to respective ones of a plurality of optical amplifiers disposed in the output paths. The optical amplifiers each have a prescribed gain shape across the bandwidth of its respective sub-band. A coupler recombines the distinct sub-bands and couples them onto the optical fiber transmission path. An optical preamplifier is coupled to an input of the splitter. The optical preamplifier is a Raman amplifier having a bandwidth substantially encompassing the prescribed bandwidth of the multiplexed optical signal.

REFERENCES:
patent: 5452116 (1995-09-01), Kirkby et al.
patent: 5883738 (1999-03-01), Oshima et al.
patent: 5905838 (1999-05-01), Judy et al.
patent: 5959750 (1999-09-01), Eskildsen et al.
patent: 5978130 (1999-11-01), Fee et al.

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