Title page for etd-0815112-092459


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URN etd-0815112-092459
Author Yu-lun Wu
Author's Email Address No Public.
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Department Electro-Optical Engineering
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Design and Fabrication of High-Speed 25Gb/s Directly Modulated DFB Semiconductor Laser Diode
Date of Defense 2012-07-18
Page Count 106
Keyword
  • Planarization
  • Ridge waveguide
  • Coplanar waveguide
  • DFB lasers
  • Directly modulation
  • Abstract With a rapid increase in information capacity of Internet access, high-speed, highly-efficiency, and cost-effectiveness laser source for optical fiber communication is required. High-speed 25Gb/s directly modulated laser is essential of this communication range, because of its simple structure, direct-modulation characteristics, low cost, and integration capability for wavelength division multiplexing (WDM) system, and moreover, it can achieved 100Gb/s data transmission by four channel module system.
    In this work, data modulation speed of 25Gb/s direct modulation DFB laser has been achieved. By employing high-speed coplanar waveguide structure with semi-insulating substrate, high-speed with f3dB > 20GHz has been demonstrated. By the electrical reflection measurement, it confirmed that the high-speed direction modulation can be realized through reduction of electrical parasitics.
    The laser chips is measured under continuous-wave mode at room temperature. In 1300nm and 1550nm wavelength device, slope efficiency obtained by taper fiber coupled of 0.045 and 0.07mW/mA respectively, output power up to 2.73 and 3.96mW/facet at 60mA. The Side Mode Suppression Ratio was greater than 35dB. 3dB bandwidth of greater than 16GHz and 20.5GHz, relaxation oscillation frequency of 12GHz and 16.6GHz. Finally, clearly back-to-back 25Gb/s eye diagram and error-floor-free performance were obtained.
    Advisory Committee
  • Ann-kuo Chu - chair
  • Chao-kuei Lee - co-chair
  • Wei-Hung Su - co-chair
  • Yi-jen Chiu - advisor
  • Files
  • etd-0815112-092459.pdf
  • Indicate in-campus at 3 year and off-campus access at 3 year.
    Date of Submission 2012-08-15

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