本論文探討在雙波長脈衝雷射中因兩波長互相競爭引起的動態行為以及透過共振腔設計使雙波長雷射為圓柱向量光輸出。在雙波長動態行為的研究中，利用T行腔使Nd:GdVO4雷射產生波長1064 nm的Q開關脈衝以及1342 nm的Spiking脈衝，藉由改變泵源功率觀察雙脈衝的動態變化，進一步的將這些動態行為分類。研究發現改變1342 nm在增益介質上的光斑大小以及泵源功率會引起不同的動態行為。於雙波長圓柱向量光的研究中，經由共振腔的設計使1064 nm與1342 nm兩波長能同時在雷射中共存並為圓柱向量光輸出。實驗中兩波長量測出的偏振度分別為80.32 %與89.95 %對應至1064 nm以及1342 nm，確認了圓柱向量光的偏振品質；此外於圓柱向量光輸出的脈衝雷射同樣觀察到波長1064 nm與1342 nm經不同模態競爭引起的雙脈衝行為，隨著1342 nm腔長的改變動態行為亦跟著變化。

In this thesis, we study dual-wavelength pulse dynamics in Nd:GdVO4 laser. By using the T-type cavity configuration, the dual-wavelength pulse were generated at 1064 nm and 1342 nm based on the mechanism of mixing passive Q-switching and spiking. With increasing the pump power, various dynamical behaviors occurred and these pulse dynamics can be classified. Furthermore, we found that changing the spot size of 1342 nm on gain medium can also cause the different pulse dynamics.
In the other part, cylindrical vector beam were generated in dual-wavelength Nd:GdVO4 laser. By appropriate cavity design, the cavity configuration satisfied the generation condition of azimuthally polarized beam and radially polarized beam in dual-wavelength laser at 1064 nm and 1342 nm. The degree of polarization were 80.32 % and 89.95 % corresponding to 1064 nm azimuthally polarized beam and 1342 nm azimuthally polarized beam. In dual-wavelength pulse operation of cylindrical vector beam, we investigated the pulse dynamics in mode competition between radially polarized beam and higher order transverse mode. Various dynamical behaviors occurred by changing the 1342 nm cavity length.

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