本論文研究泵源焦點聚焦在擴散接合晶體不同位置時，輸出雷射的特性變化。過往研究大部分都專注於討論接合處的雙波長特性，沒進一步去討論每個位置的細微分布，實驗中可以發現因為〖Nd:GdVO〗_4與〖Nd:YVO〗_4晶體的本身材料特性不同，因此在改變泵源功率時在不同位置上會激發出不同的波長分布，進一步討論其中雙波長的相位、強度變化。在鎖模的部分，將一般輸出耦合鏡換成具飽和吸收體特性的輸出耦合鏡，藉此來產生脈衝雷射，焦點在擴散接合晶體中的〖Nd:GdVO〗_4的臨界功率會比〖Nd:YVO〗_4來得低、鎖模品質、穩定性也較好，較有機會產生連續波鎖模(CWML)，此外將共振腔的腔長操作在穩定區邊界，藉由晶體的雙折射效應，產生徑向偏振(radial polarization)的圓柱向量光束。

In this thesis, we studied the generation of different wavelengths and mode-locked distributions by focusing the pumping source on different locations of the diffusion-bonded crystal. When focusing on 〖Nd:GdVO〗_4 of the diffusion bonded crystal, single wavelength of 1065 nm was generated. However, when focusing on 〖Nd:YVO〗_4 of the diffusion bonded crystal, single wavelength of 1066 nm was generated. If the focal point was at the junction of the diffusion bonding crystal, dual-wavelength would be generated. Furthermore, we discussed the phase change and the intensity variation of this dual wavelength output. In the part of the mode-locking, replacing the general output coupler with a saturable output coupler to generate pulsed laser. The mode locking quality, stability on the 〖Nd:GdVO〗_4 in the diffusion bonded crystal is better than that of the 〖Nd:YVO〗_4. Due to the birefringence of the diffusion-bonded crystal , the e-ray and o-ray could be separated. Therefore, radially-polarized light was able to be generated at specific cavity length.

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