Title page for etd-0917117-105605


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URN etd-0917117-105605
Author BO-HONG CHEN
Author's Email Address trampertw0561@gmail.com
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Department Electro-Optical Engineering
Year 2017
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Broadband and high-speed 1300nm electro-absorption modulator using InAlGaAs multiple quantum well
Date of Defense 2017-09-15
Page Count 55
Keyword
  • Quantum well material
  • Electroabsorption modulator
  • Quantum confinement Stark Effec
  • sweep out time
  • Abstract In order to achieve high-speed, low-cost and high-capacity data transmission, Wavelength Division Multiplexing (WDM) has been widely applied to transmit optical signals into the same optical fiber with different wavelengths in communication systems. Electro-absorption modulators (EAM) are limited by narrow absorption-bandwidths. The cost in WDM systems increase due to signals have unique quantum wells to epitaxy.
    In this thesis, we adjusted appropriate quantum well material to optimize electroabsorption modulator (EAM). The large conductive band offset ΔEc makes EAM keep strong absorption even at large bias, the smaller valence band offset ΔEv will improve the carrier accumulation so that the carrier reach the electrode quickly. This way achieves strong absorption efficiency and high modulation of speed through the best quantum well material ratio.
    We improve RC limitation by the wet etching and BCB for waveguide processing and coplanar-waveguide transmission line (CPWL) with semi-insulating substrate for EAM processing through the specially designing InGaAlAs/InGaAlAs multiple-quantum well parameters that optimize sweep out time and extinction ratio, which is repeatable and effective for cost reduction. We successfully demonstrate EAM with more than 40 nm operation wavelengths and over 10dB extinction ratio and reach up to 40Gb/s of modulation speed for WDM systems.
    Advisory Committee
  • Wei Lin - chair
  • Chao-Kuei Lee - co-chair
  • Yung-Jr Hung - co-chair
  • Yi-Jen Chiu - advisor
  • Files
  • etd-0917117-105605.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2017-10-17

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