Title page for etd-0205113-185021


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URN etd-0205113-185021
Author Shouyi Jin
Author's Email Address No Public.
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Department Electro-Optical Engineering
Year 2012
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Monolithic Integration of High Speed Semiconductor Quantum Dot Electroabsorption Modulator and Optical Amplifier
Date of Defense 2013-01-28
Page Count 101
Keyword
  • Optical Amplifier
  • Carrier escape
  • Electroabsorption Modulator
  • E-O Response
  • Semiconductor Quantum dot
  • Abstract   Self-assembly semiconductor quantum dot (QD) has been widely used as optoelectronic applications due to its delta-function-like density of state, insensitive to photon scattering, the capability of mass production, greatly enhancing quantum confined and exciton effect.Therefore, device applications, such as, electroabsorption modulator(EAM) and semiconductor optical amplifier (SOA) can have benefits over the conventional types through such active region. In this work, a monolithic integration of cascaded EAM and SOA based on QD material is proposed and demonstrated. Through high-speed cascaded electrode design to eliminate electrical parasitics, high-speed of QD carrier escaping processing and thus electroabsorption modulation can thus be observed.
      In the device characterization, electro luminescence (EL) is first used to examine the optical transition of QD, showing 1200-1220 nm for ground state. Using the EL spectrum measurement, the red shift of 20 nm in photocurrent peaks from 0V to 10V is observed. Also, the peaks exhibit a quadratic relation against with bias, confirming QCSE effect of QD. In the optical transmission measurement, 1260 nm light excites on a 580 μm long device, obtaining 1.6dB extinction(QD’s inhomogeneous) by voltage swing of 10V. By the high-speed electronic cascaded circuit(CI) such that the bandwidth response bias is very sensitive and the use of multi-stage to increase E-O response, leading to 3dB bandwidth of higher than 30GHz.
    Advisory Committee
  • Ann-Kuo Chu - chair
  • Chao-Kuei Lee - co-chair
  • Wei-Hung Su - co-chair
  • Yi-Jen Chiu - advisor
  • Files
  • etd-0205113-185021.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2013-02-05

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