arXiv 1607.013472016-07-05physics.atom-phphysics.chem-phphysics.ins-det

用于宽波长调谐的低温外腔二极管laser

A low-temperature external cavity diode laser for broad wavelength tuning

William G. Tobias, Jason S. Rosenberg, Nicholas R. Hutzler, Kang-Kuen Ni

备注：: 6 pages, 6 figures
DOI：: 10.1063/1.4967231

摘要：

我们报道了一种用于宽波长调谐的低温外腔半导体激光器（ECDL）系统的设计和表征。利用多个二极管模型实现的性能解决了低于633 nm的商业红色激光二极管的稀缺性，633 nm是与许多分子和离子的光谱学相关的波长范围。使用多级热电冷却和水冷却的组合，激光二极管的工作温度降低到-64 ° C，比环境温度低85°C以上。该激光系统集成了温度和衍射光栅反馈可调谐性，分别用于粗调和微调波长。对于两种不同的二极管模型，单模操作实现了38 mW的输出功率在616.8 nm和69 mW在622.6 nm，超过15 nm低于其环境温度自由运行波长。ECDL设计可用于任何可用波长的二极管，允许单个二极管在数十纳米范围内连续调谐，并扩展了商用激光二极管的波长覆盖范围。

英文摘要：

We report on the design and characterization of a low-temperature external cavity diode laser (ECDL) system for broad wavelength tuning. The performance achieved with multiple diode models addresses the scarcity of commercial red laser diodes below 633 nm, which is a wavelength range relevant to spectroscopy of many molecules and ions. Using a combination of multiple-stage thermoelectric cooling and water cooling, the operating temperature of a laser diode is lowered to -64°C, more than 85°C below the ambient temperature. The laser system integrates temperature and diffraction grating feedback tunability for coarse and fine wavelength adjustments, respectively. For two different diode models, single-mode operation was achieved with 38 mW output power at 616.8 nm and 69 mW at 622.6 nm, more than 15 nm below their ambient temperature free-running wavelengths. The ECDL design can be used for diodes of any available wavelength, allowing individual diodes to be tuned continuously over tens of nanometers and extending the wavelength coverage of commercial laser diodes.

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