在目前物理量中，頻率為最能精準量測的值，若將其他物理量以頻率表示，可增加物理量之準確度。而透過雷射致冷鈣原子的方法，可得到光頻標準，未來可將此標準應用於其他領域，達成提升準確度的目的。
由於鈣原子的致冷能階中1S0 - 1P1的波長為423 nm，目前尚未有適合波長423 nm的高功率雷射，所以本篇論文之目的為製造適合鈣原子雷射致冷之藍光雷射。
本篇論文主要為利用注入鎖頻之方法，將鈦藍寶石雷射的高功率輸出與二極體雷射中心波長為846 nm波長結合，並且進行雷射倍頻，以得到中心波長423 nm的藍光。未來將使用此道光束進行與鈣原子致冷有關之實驗。
本實驗中，將紅外光二極體雷射作為主雷射，以注入鎖頻從屬雷射連續波鈦藍寶石雷射之方法，得到一輸出功率880 mW且中心波長為846 nm的紅外光雷射。接下來利用KNbO3晶體進行倍頻效應，將KNbO3放置於增益共振腔中，調整晶體之溫度達成相位匹配。最後得到倍頻光輸出功率為25 mW且波長為423 nm之藍光雷射，倍頻效率為3.2 %。其他利用KNbO3晶體倍頻成果相比，在倍頻光波長同樣為423 nm時，可得到倍頻效率為19 %。經過計算，本實驗中倍頻效率理論值為23.7%，為實際實驗值的13%，由於倍頻效果仍未臻完美，故仍需進一步研究降低倍頻效果的原因，以進行之後雷射致冷及捕捉鈣原子之工作。

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