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Proceedings Paper

Coupling characteristics between fundamental mode square waveguide and fiber
Author(s): Fuyuan Guo; Lianhuang Li; Hua Zheng; Yi Wang; Jinrui Ke; Tiangui Dai; Xiaoming Lin
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Paper Abstract

Based on the weakly waveguide approximation, the eigen mode field distribution of fundamental mode step index square waveguide is suggested, and the overlap integral formula between two mode field distributions is employed, the expression of coupling efficiency between fundamental mode step index square waveguide and fiber is suggested. As the values of beam propagation factors of fundamental mode step index square waveguide and fiber are closed to unit in a certain range of normalized frequency, it is rational to express the mode field distributions of fundamental mode square waveguide and fiber by the Gaussian approximation in some range of normalized frequency. As the equivalent mode field size which defined by the geometric mean of second moment mode field size and differential operator mode field size is employed to express the waist sizes of Gaussian approximation for fundamental mode step index square waveguide and fiber, the coupling characteristics between fundamental mode step index square waveguide and fiber is discussed, and a useful optimum coupling condition is suggested. The conclusions would be beneficial to the assembling technology of optical waveguide device.

Paper Details

Date Published: 27 November 2012
PDF: 7 pages
Proc. SPIE 8555, Optoelectronic Devices and Integration IV, 85551H (27 November 2012); doi: 10.1117/12.2001111
Show Author Affiliations
Fuyuan Guo, Fujian Normal Univ. (China)
Lianhuang Li, Fujian Normal Univ. (China)
Hua Zheng, Fujian Normal Univ. (China)
Yi Wang, Fujian Normal Univ. (China)
Jinrui Ke, Fujian Normal Univ. (China)
Tiangui Dai, Fujian Normal Univ. (China)
Xiaoming Lin, Fujian Normal Univ. (China)


Published in SPIE Proceedings Vol. 8555:
Optoelectronic Devices and Integration IV
Xuping Zhang; Hai Ming; Joel M. Therrien, Editor(s)

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