Pumping light source unit, raman amplifier, and optical...

Details Pumping light source unit, raman amplifier, and optical... Pumping light source unit, raman amplifier, and optical...

2005-03-15

2005-03-15

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Raman or brillouin process

C359S341300

Reexamination Certificate

active

06867907

ABSTRACT:
The present invention relates to a pumping light source unit for Raman amplification and the like comprising a structure for improving the pumping light spectrum controllability so as to enable output signal light spectrum adjustment within an amplification wavelength band. The pumping light source unit comprises N (≧2) pumping light sources for outputting N channels of pumping light having respective wavelengths different from each other, a multiplexer for multiplexing the N channels of pumping light, and an output structure for supplying a Raman amplification optical fiber with the pumping light outputted from the multiplexer. In particular, at least one of the N pumping light sources includes a variable length pumping light source adapted to change the channel wavelength of pumping light outputted therefrom. This configuration makes it possible to adjust pumping light spectra, thereby improving the controllability of output signal light spectra (Raman gain spectra).

REFERENCES:
patent: 6125162 (2000-09-01), English
patent: 6433921 (2002-08-01), Wu et al.
patent: 6525870 (2003-02-01), Cho et al.
patent: 6636344 (2003-10-01), Akasaka et al.
patent: 2001-208840 (2001-08-01), None

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