2005-08-012024-05-13https://scholars.lib.ntu.edu.tw/handle/123456789/651689摘要：超快雷射具備在時間上高解析度與高峰值功率的脈衝特性，可用作觀測超快動態現象、測量超快光電元件的工具，亦可用以研究非線性現象，在電子、物理、化學、生物、醫學等方面皆有極高的應用價值。 色散補償的設計是影響超快雷射脈衝寬度的重要因素，但為了補償色散而加入的光學元件造成雷射的體積變大、對準困難等缺點。本實驗室所成功開發出的多次再入射之雙鏡式環形共振腔雷射，非常適合以鍍膜方式達成色散補償，此共振腔之成果已發表於Optics Letters與IEEE Journal of Quantum Electronics等期刊，以其多次再入射之特性，結合chirped mirror之設計，可大幅提昇色散補償之效果，因此，提出本計畫以此架構搭配被動式鎖模技術，直接將coupler設計成chirped mirror，無需外加任何光學元件來做色散補償，可做出架構簡單、體積小、光學元件少、校準容易的被動式飛秒鎖模雷射。 本計畫第一年將以Yb:YAG為增益介質，搭配適合的飽和吸收體，如Cr3+:GaAs及Cr4+:YAG，計畫完成雙鏡式環形鎖模雷射的色散補償理論模擬，並以chirped mirr<br> Abstract: Mode-locked lasers have high temporal resolution and high pulsed power, and can be used to probe ultrafast phenomena, characterize ultrafast optical-electric elements, and its high power can also be used to study nonlinear phenomena. Ultrafast techniques have been extensively applied in physics, chemistry, biology, medicine, etc. Design of the dispersion compensation is an important issue to mode-locked lasers. Adding intracavity optical elements to compensate the dispersion will make the volume bigger, become more difficult in alignment, etc. A multi-reentrant ring laser cavity has been successfully developed in our laboratory. It has been published in Optics Letters and IEEE Journal of Quantum Electronics. Combining this multi-reentrant ring cavity and chirped mirrors for dispersion compensation, no additional intracavity optical element is needed to compensate the dispersion. A simple, compact, easy aligning femtosecond mode-locked laser can be implemented. In the first year, we will use Yb:YAG as the gain medium, and Cr3+GaAs and/or Cr4+:YAG as the saturable absorber to design chirped and double chirped mirrors for dispersion compensation in passively mode-locked laser. In the second year, we will use the e-gun optical coating system in our laboratory to do the coating for all elements in the mode-locked laser. Process optimization will be conducted. And a cw Yb:YAG laser will be constructed. In the third year, we will align all the optical elements and generate a self-started 1-W, 300-fs mode-locked laser. All the characteristics of the laser will be measured and will be compared with the simulation.環形共振腔被動鎖模雷射固態雷射Ring laserMode-locked laserSolid-state laser