Coherent light generators – Particular component circuitry – Optical pumping
Patent
1988-08-31
1990-07-17
Sikes, William L.
Coherent light generators
Particular component circuitry
Optical pumping
350 9616, 372 3, 372 6, G02B 626, G02B 742
Patent
active
049417266
ABSTRACT:
A tapered optical fiber amplifier is designed to provide for long-distance, un-repeatered fiber optic communications. Two single-mode fiber portions are tapered to efficiently intensify and couple an information signal from a laser diode and a pump signal at a shorter wavelength into a fused, tapered single-mode fiber optic coupler. The concentrated information signal and concentrated pump signal are combined via the coupler which is coupled to a several-kilometer length of a relatively small core diametered single-mode fiber to create a nonlinear optical effect (stimulated Raman scattering) (SRS). The SRS causes Raman shift of the pump signal to amplify the information signal, resulting in amplified signals that are efficiently coupled out of the relatively small core diametered optical fiber with another single-mode optical fiber taper portion. The tapered fiber portions launch the signal and pump light into the small core diametered single-mode fiber length, thereby generating SRS to result in a signal amplification and an efficient extraction of the amplified signal via the tapered output fiber portion or pigtail.
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Russell Stephen D.
Stamnitz Timothy C.
Fendelman Harvey
Keough Thomas Glenn
Sikes William L.
The Unites States of America as represented by the Secretary of
Wise Robert E.
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