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Proceedings Paper

Analysis of erbium-doped segmented-cladding fiber for optical amplification
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Paper Abstract

A segmented-cladding fiber (SCF) has a uniform core of high refractive index and a cladding consisting of alternating high and low refractive-index angular segments. It is known that such a fiber can be designed to provide effective single-mode operation with an ultra-large core size. In this paper, we analyze a SCF that is doped with erbium ions in its high-index regions (i.e., the core and the high-index cladding segments). The core of the fiber has a diameter of 20 &mgr;m and the cladding consists of 8 segments of equal size. The concentration of the erbium ions is 1×1026. We calculate the mode-field distributions in the fiber at the signal (1530 nm) and the pump (980 nm) wavelength with the finite-element method. We obtain the gain characteristics and the pump efficiency of the fiber by solving the propagation rate equations. Assuming an initial signal power of 1 μW, the threshold pump power required is 102 mW for a 30-cm long fiber. The optimal gain of the fiber is 25 dB, which can be achieved with a fiber length of 26 cm and a pump power of 150 mW. Our results confirm that a properly designed SCF can provide highly efficient optical amplification with a short length.

Paper Details

Date Published: 8 January 2008
PDF: 8 pages
Proc. SPIE 6838, Optoelectronic Devices and Integration II, 683806 (8 January 2008); doi: 10.1117/12.755055
Show Author Affiliations
Jiwen Yang, Univ. of Science and Technology of China (China)
Hai Ming, Univ. of Science and Technology of China (China)
K. S. Chiang, City Univ. of Hong Kong (Hong Kong China)

Published in SPIE Proceedings Vol. 6838:
Optoelectronic Devices and Integration II
Xuping Zhang; Hai Ming; Maggie Yihong Chen, Editor(s)

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