Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1991-07-24
1993-07-06
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359343, 372 6, H01S 316
Patent
active
052259250
ABSTRACT:
An optical fiber for amplifying or sourcing a light signal in a single transverse mode. The fiber comprises a host glass doped with erbium (Er) and a sensitizer such as ytterbium (Yb) or iron (Fe). Preferably the host glass is doped silicic glass (e.g., phosphate or borate doped). Electrical energy is provided to diode lasers that pump the Nd laser rod, which in turn pumps the fiber. Such a configuration for pumping the fiber provides a high energy transfer from the diodes to the Nd laser rod, which in turn enables high pumping powers to be coupled into the single-mode co-doped fiber. Based on the amplification characteristics of the co-doped fiber and the efficient coupling of power from the laser diodes, the amplifier provides power and small signal gains comparable to the best observed, while requiring only conventional and readily available diode-based pump sources.
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Anthon Douglas W.
Barnes William L.
Grubb Stephen G.
Townsend Janet E.
Amoco Corporation
Mican Steven G.
Moskowitz Nelson
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