Fabrication and characteristics of twin core erbium-doped fiber

Yongjun Fu; Kai Zheng; Zhi Wang; Guobin Ren; Shuisheng Jian

doi:10.1117/12.521484

30 April 2004 Fabrication and characteristics of twin core erbium-doped fiber

Yongjun Fu, Kai Zheng, Zhi Wang, Guobin Ren, Shuisheng Jian

Proceedings Volume 5279, Optical Fibers and Passive Components; (2004) https://doi.org/10.1117/12.521484
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China

Abstract

Twin core erbium-doped fiber is fabricated using a combination of MCVD, solution doping and post processing technique. This paper mainly study the birefringence of twin-core Erbium doped fiber including geometrical and stress birefringence. First we analysis the mode distribution of twin core fiber and geometrical birefringence by supercell lattice orthogonal function method using the structure parameters measured. Then the geometrical birefringence also calculated from the couple theory. The calculated result showed that two elliptical cores would have higher geometrical birefringence than two circular cores. Generally the Er-doped fiber is high Germanium doped to keep high Numerical Aperture (NA), which cause high thermal expansion coefficient difference between the core and the cladding, and the stress birefringence is anisotropic. According the distribution of stress field, we calculated the stress birefringence in the area of assembling of light power, which approximate to 10^-4. The investigation proved that twin core Erbium doped fiber has high birefringence and good polarization maintaining characteristics.

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Yongjun Fu, Kai Zheng, Zhi Wang, Guobin Ren, and Shuisheng Jian "Fabrication and characteristics of twin core erbium-doped fiber", Proc. SPIE 5279, Optical Fibers and Passive Components, (30 April 2004); https://doi.org/10.1117/12.521484

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KEYWORDS

Birefringence

Erbium

Polarization

Fiber lasers

Cladding

Optical fibers

Phase modulation

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