Optical amplification fiber, optical amplifier module,...

Details Optical amplification fiber, optical amplifier module,... Optical amplification fiber, optical amplifier module,...

2004-09-03

2008-10-14

Bolda, Eric (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C398S160000, C385S122000, C385S123000

Reexamination Certificate

active

07436583

ABSTRACT:
The present invention relates to an optical amplification fiber and others capable of effectively reducing nonlinear interaction between signal channels even in transmission of multiplexed signal light containing multiple signal channels arranged in high density and also effectively reducing bending loss. An optical amplification module has an optical isolator, a WDM coupler, an Er-doped optical fiber (EDF) as an optical amplification fiber, a WDM coupler, and an optical isolator, which are arranged in order on a signal light propagation path from an input connector to an output connector, and further has a pumping light source connected to the WDM coupler and a pumping light source connected to the other WDM coupler. The EDF, at the wavelength of 1607 nm, has a mode field diameter (MFD) of 10 μm or more to the fundamental mode and a MAC number (=MFD/cutoff wavelength) of 6.8 or less to the fundamental mode.

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