Dual-band fiber optic amplification system using a single pump s

Details Dual-band fiber optic amplification system using a single pump s Dual-band fiber optic amplification system using a single pump s

1997-09-16

1999-11-02

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359160, 359345, H01S 316, H04B 1000

Patent

active

059781300

ABSTRACT:
A dual-band optical amplifier uses a single pump source, such as a YAG solid-state laser emitting a pump light at a wavelength of 1047 nm, to provide amplification in both the 1550 nm and 1310 nm bands which are commonly encountered in the optical telecommunications environment. The pump light is fed into a fiber doped with praseodymium fluoride having Pr atoms in a +3 ionization state. These ions exhibit a ground state absorption that includes the 1047 nm wavelength. The same pump light is also coupled to a separate amplification fiber doped with trivalent erbium ions and ytterbium. This combination of ions also can be pumped to a metastable excited state by a 1047 nm wavelength source. Accordingly, when photon emission is generated, there is signal amplification in both fibers results.

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Patena et al, Optical Fiber Tech: Materials, Devices and Systems, vol. 1, #4, pp. 322-326, Oct. 1995; abst. only herewith.
Payne et al, 14th European Conf. on Opt. Commun., Sep. 15, 1988, pp. 49-53, vol. 292.
Townsend et al, Electronics Letters, vol. 27, #21, Oct. 10, 1991, pp. 1958-1959.
Galant et al, Sov. J. Quant. Elect., vol. 6, #10, Oct. 1976, pp. 1190-1195.

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