Optical: systems and elements – Optical amplifier – Correction of deleterious effects
Reexamination Certificate
2005-10-11
2005-10-11
Gregory, Bernarr E. (Department: 3663)
Optical: systems and elements
Optical amplifier
Correction of deleterious effects
Reexamination Certificate
active
06954305
ABSTRACT:
An optical amplifier1is constructed using an amplification optical waveguide in which a first amplification optical fiber10and a second amplification optical fiber20are connected in series. A P/Al-codoped EDF10excellent in noise characteristics is applied to the upstream first amplification optical fiber10,and an EDF20such as an Al-doped EDF or the like is applied to the downstream second amplification optical fiber20.This realizes the optical amplifier1,and the optical transmission system using it, capable of amplifying the signal light in the signal light wavelength band of not less than the wavelength of 1570 nm including the L-band wavelength band of wavelengths from 1570 to 1600 nm, with good gain characteristics and achieving the improvement in the noise characteristics.
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Tadashi Kasamatsu et al., OAA1999, Postdeadline paper 1, 1999.
Gregory Bernarr E.
Hughes Deandra M.
Sumitomo Electric Industries Ltd.
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