Attenuation in waveguides on FR-4 boards due to periodic substrate undulations

Yin Jung Chang, Thomas K. Gaylord, Gee Kung Chang

研究成果: 雜誌貢獻期刊論文同行評審

7 引文 斯高帕斯(Scopus)

摘要

The guided-mode attenuation associated with optical-interconnect-polymer waveguides fabricated on FR-4 printed-circuit boards is quantified. The rigorous transmission-line network approach is used and the FR-4 substrate is treated as a long-period substrate grating. A quantitative metric for an appropriate matrix truncation is presented. The peaks of attenuation are shown to occur near the Bragg conditions that characterize the leaky-wave stop bands. For a typical 400 μm period FR-4 substrate with an 8 μm corrugation depth, a buffer layer thickness of about 40 μm is found to be needed to make the attenuation negligibly small.

原文???core.languages.en_GB???
頁(從 - 到)2234-2243
頁數10
期刊Applied Optics
46
發行號12
DOIs
出版狀態已出版 - 20 4月 2007

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