G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/00 (2006.01) G02B 6/34 (2006.01) H04B 10/135 (2006.01) G02B 6/44 (2006.01)
Patent
CA 2350928
A Raman-amplified optical transmission system [80] includes a source of optical transmission signals having a system wavelength, .lambda.5, that are connected to one end of the of a first optical fiber [50-1] having a large effective area, i.e., A eff >= 70 µm2. The other end of the first optical fiber is connected to a second optical fiber [50-2] having a small effective area, i.e., A eff >= 60 µm2. Preferably, the first and second optical fibers have opposite dispersion signs. A wavelength- division multiplexer [87], for example, couples optical transmission signals .lambda.l....lambda.n, from an optical pump [88] to the second optical fiber that cause it to exhibit stimulated Raman scattering, which provides amplification of the optical transmission signals. Preferably, the optical pump signals propagate along the second optical fiber in a direction that is opposite the direction of the optical transmission signals. Exemplary cables [500, 600] are disclosed that include both large and small- effective-area fibers. One cable [600] is defined by a planar array of optical fibers that are bound together by a matrix material [65] in what is referred to as a ribbon, and another cable [500] is defined by fibers that are enclosed within one or more plastic tubes [52].
Kirby Eades Gale Baker
Lucent Technologies Inc.
LandOfFree
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