Accession Number : ADP006974

Title :   Progress in Erbium Doped Fiber Amplifiers,

Corporate Author : AT AND T BELL LABS MURRAY HILL NJ

Personal Author(s) : Simpson, J. R. ; DiGiovanni, D. J.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Erbium fiber amplifiers are entering a fourth year of development with six commercial offerings now available, the result of rapid improvements in pump lasers, wavelength division multiplexers, isolators and doped fiber designs. A number of challenges remain however to improve the performance and ensure reliability in field applications. Improvements in the rare earth doped fiber, itself, remain a challenge. Rare earth doped fiber fabrication has been dominated by variations on traditional low loss telecommunications fiber using GeO 2, Al 2 0 3, and P 2 0 5 co- dopants yielding fiber which is fusion splice compatible with telecommunications fiber 1. It has long been realized that alternate host compositions may improve the efficiency and gain-bandwidth products at the expense of compatibility with telecommunications fiber. Host materials of compound glasses, phosphates, fluorophosphates and others have recently been reported 2,3,4,5. The incorporation of Ca in a GO2-Al2O3-SiO2 or Al 2 0 3 -SiO 2 host has, for example, also been shown to improve the efficiency of 813 nm pumping 3.

Descriptors :   *AMPLIFIERS, *FIBERS, BANDWIDTH, COMPATIBILITY, DIVISION, EFFICIENCY, ERBIUM, EYEGLASSES, FABRICATION, GAIN, LASERS, LOW LOSS, NUMBERS, PHOSPHATES, PUMPING, PUMPS, RELIABILITY, SPLICES, TELECOMMUNICATIONS, VARIATIONS.

Subject Categories : Electrical and Electronic Equipment
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE