全固态连续波laser系统用于铍离子的电离、冷却和量子态操纵
All-solid-state continuous-wave laser systems for ionization, cooling and quantum state manipulation of beryllium ions
摘要：
我们描述了用于铍离子光电离、多普勒冷却和量子态操纵的激光系统。对于中性铍的光电离，我们已经开发了一个连续波235 nm的源获得两个阶段的倍频从二极管激光器在940 nm。该系统在470 nm处提供高达400 mW的功率，在235 nm处提供高达28 mW的功率。为了控制铍离子，从四个红外光纤激光器通过和频产生和二次谐波产生在313 nm处的三个激光波长。在1051和1551 nm两束泵浦光的作用下，626 nm和313 nm的激光输出功率分别达到7.2 W和1.9 W。在1 W的313 nm功率下测量到低于0.5%/小时的强度波动（在8小时的操作期间）。这些系统用于将铍离子加载到分段离子阱中。
英文摘要：
We describe laser systems for photoionization, Doppler cooling and quantum state manipulation of beryllium ions. For photoionization of neutral beryllium, we have developed a continuous-wave 235 nm source obtained by two stages of frequency doubling from a diode laser at 940 nm. The system delivers up to 400 mW at 470 nm and 28 mW at 235 nm. For control of the beryllium ion, three laser wavelengths at 313 nm are produced by sum-frequency generation and second-harmonic generation from four infrared fiber lasers. Up to 7.2 W at 626 nm and 1.9 W at 313 nm are obtained using two pump beams at 1051 and 1551 nm. Intensity fluctuations below 0.5 % per hour (during 8 hours of operation) have been measured at a 313 nm power of 1 W. These systems are used to load beryllium ions into a segmented ion trap.
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