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Proceedings Paper

Numerical analysis of high power ytterbium-doped segmented-cladding fiber amplifier
Author(s): Kun Gao; Anting Wang
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Paper Abstract

We analyze numerically an ytterbium-doped segmented-cladding fiber (SCF) for optical amplification. The analysis combines a full-vector finite-element method with propagation rate equations to calculate mode-field distributions and longitudinal power distribution. The results show that optimal parameters depend directly on the depletion position of the pump power. With a typical ytterbium-ion concentration of 4.0×1025 ions/m3, an launched pump power of 5 W, and an input signal power of 1 μW, the maximum achievable gain is around 33 dB with an optimal fiber length of 0.6 m. The threshold pump power is about 500 mW for input signal power below 0.3 mW and the saturation output signal power is about the order of 300 mW at the pump power of 5 W. The results reveal that, by using appropriate pump power, a few meters of ytterbium-doped ultra-large-core SCF can provide much higher gain by its large core than that of a conventional ytterbium-doped fiber while maintaining the flexibility of length and dynamic range.

Paper Details

Date Published: 18 February 2009
PDF: 8 pages
Proc. SPIE 7276, Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications, 72761E (18 February 2009); doi: 10.1117/12.823321
Show Author Affiliations
Kun Gao, Univ. of Science and Technology of China (China)
Anting Wang, Univ. of Science and Technology of China (China)

Published in SPIE Proceedings Vol. 7276:
Photonics and Optoelectronics Meetings (POEM) 2008: Laser Technology and Applications
Peixiang Lu; Katsumi Midorikawa; Bernd Wilhelmi, Editor(s)

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