Title page for etd-0904112-064653


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URN etd-0904112-064653
Author Shr-Hau Huang
Author's Email Address m993090008@student.nsysu.edu.tw
Statistics This thesis had been viewed 5336 times. Download 449 times.
Department Electro-Optical Engineering
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Graphene Mediated Saturable Absorber on Stable Mode-locked Fiber Lasers Employing Different Dispersants
Date of Defense 2012-07-11
Page Count 74
Keyword
  • TCP
  • POEM
  • Mica
  • dispersants
  • graphene
  • Abstract Stable passive mode-locked fiber lasers(MLFLs) employing graphene saturable absorber (SA) are demonstrated. The graphene were dispersed in de-ionized water by two different dispersants including fluorinated mica clay (Mica) and poly(oxyethylene)-segmented imide (POEM). Using the SA made by graphene dispersed in Mica with thickness and concentration product (TCP) of 36 (μm*wt%), the MLFLs exhibited pulsewidth, 3-dB spectral bandwidth, and modulation depth (MD) of 382 fs, 6.80 nm, and 2.57%, respectively. The graphene dispersed in POEM provides a TCP of 38 (μm*wt%) to make the MLFLs deliver pulsewidth, 3-dB spectral bandwidth, and MD of 422 fs, 6.35 nm, and 1.70%, respectively. In comparison, the graphene SA dispersed by Mica performs a better MLFL pulse quality than that dispersed by POEM. Lastly, for investigating the dispersed uniformity between Mica and POEM, we randomly chose 9 pieces and measured the MLFL performance. The result showed that using the SA made by graphene dispersed in Mica with TCP of 36 (μm*wt%), the MLFLs exhibited pulsewidth of 393±14 fs, By contrast, the graphene dispersed in POEM provided a TCP of 38 (μm*wt%) to make the MLFLs delivered pulsewidth of 442±32 fs. This result reveals that graphene SA film dispersed by Mica exhibited better uniformity than POEM.
    The MLFL of 21-layes CVD process graphene SA showed a pulsewidth of 432.47 fs, a bandwidth of 6.16nm, and a time-bandwidth product (TBP) of 0.323. This result showed that the solution blending process graphene SA exhibited better MLFL performance than CVD.
    Advisory Committee
  • Jiang-Jen Lin - chair
  • Gong-Ru Lin - co-chair
  • Chao-Yung Yeh - co-chair
  • Hsin-Hui Kuo - co-chair
  • Pi-Ling Huang - co-chair
  • Wood-Hi Cheng - advisor
  • Files
  • etd-0904112-064653.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2012-09-04

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