Tandem mach zehnder directional coupler design and simulation on silicon platform for optical coherence tomography applications

Yi Ting Lu, Benedictus Yohanes Bagus Widhianto, Shih Hsiang Hsu, Che Chang Chang

研究成果: 雜誌貢獻文章

摘要

We design and compare the splitting ratio wavelength flatness of directional coupler (DC), Mach-Zehnder directional coupler (MZDC), and tandem MZDC. All coupler responses are analyzed, and tandem MZDC performance is the best in the wavelength insensitivity compared with the other two. An MZDC with any coupling ratio could be utilized to match the maximum flatness in a 40-nm wavelength range. To extend a broad flatness range, the tandem MZDC is proposed and still follows the Mach Zehnder structure taking two MZDCs as couplers connected through a decoupled region. Unlike DC, MZDC with the flat wavelength response has a non-linear output phase. Hence, using two wavelength-insensitive MZDCs as the coupling function in a tandem MZDC could demonstrate a more extensive decoupled phase term to maximize the flat wavelength response. The tandem MZDC theoretically demonstrates the splitting ratio with 100-nm flatness in the wavelength range from 1250 nm to 1350 nm. Finally, a point spread function through the tandem MZDC shows a 24-dB signal-to-noise ratio improvement in optical coherence tomography applications.
原文英語
文章編號1054
期刊Sensors (Switzerland)
20
發行號4
DOIs
出版狀態已發佈 - 二月 2 2020

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

指紋 深入研究「Tandem mach zehnder directional coupler design and simulation on silicon platform for optical coherence tomography applications」主題。共同形成了獨特的指紋。

  • 引用此