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Proceedings Paper

Coupling of fiber-waveguide amplifier
Author(s): Shufeng Li; Changlie Song; Chengren Li; Wenchun Wang; Jianyong Li
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Paper Abstract

High efficient coupling between waveguide amplifier and single mode fiber is an important aspect for component integration in the optical communication. Mode matching degree between waveguide and fiber straightly affects coupling loss and actual light intensity distribution in waveguide. In this paper, Bessel function field in step refractive index fiber excites erbium-doped Al2O3 rib waveguide amplifiers on silicon substrate with SiO2 buffers with large refractive index changes. Rib height is selected 0.8μm for 1μm film thickness and 3μm rib width waveguide amplifier for single mode operation at signal wavelength. Signal and pump guided modes are calculated by finite element method. Mode excitation fractions of signal and pump are obtained. The dependences of coupling loss and subsequent gain on fiber core radius and fiber-waveguide offset are analyzed in detail. The coupling losses between fiber and three different geometry structure waveguide amplifiers (rectangle, trapeze, trapeze upside down) with the same active core cross-section area are compared. The gains of corresponding waveguide amplifiers are compared as well as.

Paper Details

Date Published: 17 January 2005
PDF: 9 pages
Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); doi: 10.1117/12.574615
Show Author Affiliations
Shufeng Li, Dalian Univ. of Technology (China)
Changlie Song, Dalian Univ. of Technology (China)
Chengren Li, Dalian Univ. of Technology (China)
Wenchun Wang, Dalian Univ. of Technology (China)
Jianyong Li, Dalian Univ. of Technology (China)

Published in SPIE Proceedings Vol. 5644:
Optoelectronic Devices and Integration
Hai Ming; Xuping Zhang; Maggie Yihong Chen, Editor(s)

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