Noise figure in optical amplifiers with a split-band architectur

Details Noise figure in optical amplifiers with a split-band architectur Noise figure in optical amplifiers with a split-band architectur

1998-06-03

2000-04-11

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359345, H01S 300

Patent

active

060494182

ABSTRACT:
A wideband optical amplifier employs split-band architecture in which an optical signal passes through a common amplification stage and is then split to pass through parallel gain stages, each of which may be optimized for a particular band being traversed. A broadband grating reflector is used after the input gain section to reflect the signals of one of the bands so that they again will pass through the common input gain section before passing through gain section of the split structure dedicated to their particular wavelength. Meanwhile, the other signals pass through the reflector and move on through the gain section pertinent to their wavelength.

REFERENCES:
patent: 5392154 (1995-02-01), Chang et al.
patent: 5867306 (1999-02-01), Isshiki
patent: 5905838 (1999-05-01), Judy et al.
patent: 5978130 (1999-11-01), Fee et al.
Yamashita et al; "Er.sup.3+ doped fibre pre-amplifier with subsidiary EDF for application in WDM systems using two separate wavelength bands of 1.53 and 1.55 .mu.m" Electronic Letters, vol. 31, No. 18.

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