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Systematic investigation of the avalanche effect in highly thulium-doped fiber amplifiers

KOZAK, M. M ; GOEBEL, D ; CASPARY, R ; KOWALSKY, W

Applied physics. B, Lasers and optics, 2007-01, Vol.86 (1), p.55-59 [Periódico revisado por pares]

Berlin: Springer

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Título:
Systematic investigation of the avalanche effect in highly thulium-doped fiber amplifiers
Autor: KOZAK, M. M ; GOEBEL, D ; CASPARY, R ; KOWALSKY, W
Assuntos: Amplification ; Amplifiers ; Exact sciences and technology ; Fibers ; Fundamental areas of phenomenology (including applications) ; Gain ; Laser optical systems: design and operation ; Noise ; Noise levels ; Optics ; Physics ; Pumps ; Resonators, cavities, amplifiers, arrays, and rings ; Thulium
É parte de: Applied physics. B, Lasers and optics, 2007-01, Vol.86 (1), p.55-59
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: The avalanche energy transfer in highly thulium doped fiber amplifiers (TDFA) pumped at 1056 nm with laser diodes was investigated. Amplified spontaneous emission (ASE) at 800 nm and 1470 nm as well as the remaining pump power were measured as function of the pump power to explain the efficiency of the energy transfer between thulium ions. As proof of our theory, fiber amplifiers based on self-made fluoride fibers doped with 2000 and 5000 ppm thulium were realized and their gain and noise figure was measured. A gain of more than 25 dB and a noise figure of less than 4 dB was achieved at a pump power of 210 mW in a TDFA using the 5000 ppm thulium fiber, whereas a gain maximum of only 5.6 dB was observed with the 2000 ppm TDF. These investigations are of special importance since until now almost all TDFAs have used 2000 ppm fibers.
Editor: Berlin: Springer
Idioma: Inglês

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Systematic investigation of the avalanche effect in highly thulium-doped fiber amplifiers

KOZAK, M. M ; GOEBEL, D ; CASPARY, R ; KOWALSKY, W

Berlin: Springer

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