Coupling of fiber-waveguide amplifier

Shufeng Li; Changlie Song; Chengren Li; Wenchun Wang; Jianyong Li

doi:10.1117/12.574615

17 January 2005 Coupling of fiber-waveguide amplifier

Shufeng Li, Changlie Song, Chengren Li, Wenchun Wang, Jianyong Li

Proceedings Volume 5644, Optoelectronic Devices and Integration; (2005) https://doi.org/10.1117/12.574615
Event: Photonics Asia, 2004, Beijing, China

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.

Citation Download Citation

Shufeng Li, Changlie Song, Chengren Li, Wenchun Wang, and Jianyong Li "Coupling of fiber-waveguide amplifier", Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); https://doi.org/10.1117/12.574615

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