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首页> 外文期刊>Applied optics >Tunable high-power narrow-spectrum external-cavity diode laser at 675 nm as a pump source for UV generation
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Tunable high-power narrow-spectrum external-cavity diode laser at 675 nm as a pump source for UV generation

机译：可调谐的高功率窄谱外腔二极管激光器，波长为675 nm，可作为产生紫外光的泵浦源

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摘要

High-power narrow-spectrum diode laser systems based on tapered gain media in an external cavity are demonstrated at 675 nm. Two 2 mm long amplifiers are used, one with a 500 (mu)m long ridge-waveguide section (device A), the other with a 750 (mu)m long ridge-waveguide section (device B). Laser system A based on device A is tunable from 663 to 684 nm with output power higher than 0.55 W in the tuning range; as high as 1.25 W output power is obtained at 675.34 nm. The emission spectral bandwidth is less than 0.05 nm throughout the tuning range, and the beam quality factor M~(2) is 2.07 at an output power of 1.0 W. Laser system B based on device B is tunable from 666 to 685 nm. As high as 1.05 W output power is obtained around 675.67 nm. The emission spectral bandwidth is less than 0.07 nm throughout the tuning range, and the beam quality factor M~(2) is 1.13 at an output power of 0.93 W. Laser system B is used as a pump source for the generation of 337.6 nm UV light by single-pass frequency doubling in a bismuth triborate (BIBO) crystal. An output power of 109 (mu)W UV light, corresponding to a conversion efficiency of 0.026percent W~(-1), is attained.
机译：在675 nm处演示了基于外腔中锥形增益介质的高功率窄谱二极管激光系统。使用了两个2 mm长的放大器，一个放大器具有500μm长的脊形波导段（设备A），另一个具有750μm长的脊形波导段（设备B）。基于设备A的激光系统A可在663 nm至684 nm范围内可调，输出功率在可调范围内高于0.55 W;在675.34 nm处可获得高达1.25 W的输出功率。在整个调谐范围内，发射光谱带宽小于0.05 nm，并且光束质量因数M〜（2）在1.0 W的输出功率下为2.07。基于设备B的激光系统B可在666 nm至685 nm范围内进行调谐。在675.67 nm附近可获得高达1.05 W的输出功率。在整个调谐范围内，发射光谱带宽小于0.07 nm，在输出功率为0.93 W时，光束质量因子M〜（2）为1.13。激光系统B被用作泵浦光源，用于产生337.6 nm的紫外线在三硼酸铋（BIBO）晶体中通过单倍频将光放大。获得109μW的紫外光的输出功率，对应于0.026％的W〜（-1）的转换效率。

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