Split-band amplifying apparatus using a depressed-profile...

Details Split-band amplifying apparatus using a depressed-profile... Split-band amplifying apparatus using a depressed-profile...

2006-05-30

2006-05-30

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C385S127000

Reexamination Certificate

active

07054061

ABSTRACT:
A split-band amplifying apparatus that has a first section for amplifying a long wavelength band of an optical signal and a second section equipped with a fiber amplifier for amplifying a short wavelength band of the optical signal. The fiber amplifier in the second section uses a short-pass fiber with a depressed cladding cross-section and core doped with an active material, e.g., Erbium, and pumped to a high relative inversion D. The split-band amplifying apparatus can be used to amplify signals whose short wavelength band includes at least a portion of the S-band and whose long wavelength band includes at least a portion of the C- and/or L-band.

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