在本論文中，我們以全光纖被動鎖模雷射為基礎來探討鎖模的相關原理與知識，也探究了鎖模雷射的量測儀器，如自相關儀。此外，我們設計與實驗了兩種鎖模雷射的架構。在第一個架構中，我們利用非線性偏振旋轉技術以製作偏振疊加波鎖模雷射；在第二個架構中，摻銩光纖透過增益切換來產生相似於Q切換鎖模的脈衝封包，此增益切換產生脈衝封包的現象，我們稱之為增益切換鎖模。我們應用在此雷射的概念是由模態場面積不匹配產生腔內聚焦，並利用高能量脈衝泵浦摻銩光纖而引發鎖模，故我們稱此雷射為摻銩光纖自鎖模雷射。

In this thesis, we adopted the basis of all-fiber passively mode-locked lasers to study the related principle and knowledge of mode-locking. The measuring instruments of mode-locked lasers, such as autocorrelator, are also discussed. Moreover, we designed and experimented on two structures of mode-locked laser. In the first structure, we used nonlinear polarization rotation technique to create a polarization additive-pulse mode-locked laser. In the second structure, the thulium-doped fiber through gain-switching to produce pulse envelope is similar to Q-switched mode-locking, so we named the phenomenon as gain-switched mode-locking. The concepts we applied in the laser are to induce intracavity focusing by mode-field-area mismatch and to use the pulses of high energy to pump thulium-doped fiber. As a result of the two concepts above, the laser is self-mode-locked. Therefore we called it thulium-doped fiber self-mode-locked laser.

第1章 緒論

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第2章 原理

[1] See the website: http://www.rp-photonics.com/mode_locking.html
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[7] See the website:
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[17] See the website:
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[18] See the website: http://en.wikipedia.org/wiki/Optical_autocorrelation
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第3章 偏振疊加波鎖模雷射

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第4章 摻銩光纖自鎖模雷射

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第5章 結論

[1] J. Fekete, A. Cserteg & R. Szipocs (2009) , ‘‘All-fiber, all-normal dispersion ytterbium ring oscillator,’’ Laser Physics Letters, 6 (1) pp.49-53.
[2] N.S. Shahabuddin, H. Mohamad, M.A. Mahdi, Z. Yusoff, H. Ahmad & S.W. Harun (2012) , ‘‘Passively mode-locked soliton fiber laser using a combination of saturable absorber and nonlinear polarization rotation technique,’’ Microwave and Optical Technology Letters, 54 (6) pp.1430-1432.
[3] K. -H. Lin, J. -H. Lin & C. -C. Chen (2010) , ‘‘Switchable mode-locking states in an all-fiber all-normal-dispersion ytterbium-doped laser,’’ Laser Physics, 20 (11) pp.1984-1989.