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Proceedings Paper

MMI splitter by ion exchange on K9
Author(s): Jing Yuan; Fengguang Luo; Mingcui Cao; Wenmin Chen
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Paper Abstract

A wavelength 0.85μm-based optical power splitter designed with Multi Mode Interference (MMI) by ion exchange on K9 glass was introduced. The waveguide material is K9 glass made in China and formed by K+-Na+ pure melt salt ion exchange method. The grade index profile of planar ion-exchanged waveguide on K9 was studied and accorded with erfc function through compare of experimental and theoretic index profiles. The fabrication process of planar ionexchanged waveguide device was described. The basic theory of 1×8 MMI optical power splitter was illuminated by using guided-model propagation analysis. The working wavelength is 0.85μm, and the structure parameters of 1×8 MMI splitter were designed. The core pitch on this chip is chosen as 250μm to take the fiber connections into account, and the typical cladding diameter of optical fibers as 125μm. The critical parameters in the fabrication of the MMI power splitter are the multimode section width and length. In general the key performance specifications of the optical power splitter are insertion loss and uniformity. The output performances and the refractive index change's influence of the device were simulated by Bear Propagation Method (BPM). The uniformity was 0.93×10-2dB, the average insertion loss was 9.12dB, and the maximal insertion loss was 9.14dB. The result shows that the advantages of the method include low loss, ease of fabrication, and low material cost.

Paper Details

Date Published: 5 December 2005
PDF: 7 pages
Proc. SPIE 6019, Passive Components and Fiber-based Devices II, 60193V (5 December 2005); doi: 10.1117/12.636386
Show Author Affiliations
Jing Yuan, Huazhong Univ. of Science and Technology (China)
Fengguang Luo, Huazhong Univ. of Science and Technology (China)
Mingcui Cao, Huazhong Univ. of Science and Technology (China)
Wenmin Chen, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 6019:
Passive Components and Fiber-based Devices II
Yan Sun; Jianping Chen; Sang Bae Lee; Ian H. White, Editor(s)

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