Dual-wavelength pumped thulium-doped optical fiber amplifier

Details Dual-wavelength pumped thulium-doped optical fiber amplifier Dual-wavelength pumped thulium-doped optical fiber amplifier

2006-09-26

2006-09-26

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C359S341310

Reexamination Certificate

active

07113328

ABSTRACT:
An arrangement and method provide an optical thulium doped fiber amplifier utilizing a dual wavelength pumping scheme for amplifying an optical signal. The method includes the steps of: a first deposition (a) of energy into the fiber amplifier by pumping with radiation of a first wavelength; and a second deposition (b) of energy into the fiber amplifier by pumping with radiation of a second wavelength. The radiation of the first wavelength is arranged to induce, by single photon absorption, a population to the3H4level of the thulium dopant, and the radiation of the second wavelength primarily depopulates the3F4level, by excited absorption of a single photon, preferably by strong excited state absorption to the3F2level. The steps gives a population inversion between the3H4and the3F4levels and facilitate a power efficient high gain amplification.

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