Search for the blue-detuned magic wavelength for the ytterbium optical lattice clock

为了减少由于光晶格激光器引起的镱（Yb）光晶格钟的不确定性，我们尝试寻找Yb的蓝失谐魔波长，得到以下结果：1：我们已经成功地改进了我们的Yb光学晶格时钟，将不确定性降低到我们2009年测量的1/10，这导致Yb光晶格时钟作为秒的次级表示之一的适应。第二章：我们已经成功地测量Yb和Sr光晶格时钟的频率比，通过直接比较光频率的光频梳，这使我们能够测量光移频率与微波频率标准的测量相比，具有小十倍的积分时间。3.我们研制了一种蓝色激光源，用于诱导Yb的光频移到时钟跃迁。我们用放大的红外激光二极管二次谐波产生了100 mW的399 nm激光。

In order to reduce the uncertainty of the ytterbium (Yb) optical lattice clock due to the optical lattice laser, we tried to search for the blue-detuned magic wavelength of Yb and obtained the following results; 1: We have succeeded in improving our Yb optical lattice clock, reducing the uncertainty to 1/10 of that of our 2009 measurement, which led to the adaption of the Yb optical lattice clock as one of the secondary representation of the second. 2: We have succeeded in measuring the frequency ratio of the Yb and Sr optical lattice clocks by directly comparing the optical frequencies by an optical frequency comb, which allows us to measure the light shift frequency with ten times smaller integration time compared to the measurement with a microwave frequency standard. 3: We have developed a blue laser source for inducing the light shift to the clock transition of Yb. We have obtained the 100 mW of 399 nm laser by a second harmonic generation of the amplified infrared laser diode.