论文标题
通过退化光学参数振荡在2128 nm处高效的相干光生成
Highly-efficient generation of coherent light at 2128 nm via degenerate optical-parametric oscillation
论文作者
论文摘要
与新的测试材料材料结合使用的低温操作有望减少重力波检测器中热噪声的敏感性限制。目前正在讨论的最先进的材料是结晶硅作为基于无形硅涂料的底物。但是，它们需要在2 $ \mathrmμ$ m左右操作波长，以避免吸收激光。在这里，我们基于退化的光学参数振荡器（DOPO），在2128 nm处提出一个光源，以转换1064 nm非平面环振荡器（NPRO）的光。我们以$（88.3 \，\ pm \，1.4）\，\％$在PPKTP中达到$（88.3 \，\ pm \，1.4）\，\％$的外部转换效率（定期磷酸钾，内部效率为94％），从那时起，我们推断出有效的非线性非线性性$（4.75 \，\ pm \，0.18）\，\ mathrm {pm/v} $。采用我们的方法，可以有效地转换为已建立的激光源和现有激光源的光，同时保留出色的稳定性属性。
Cryogenic operation in conjunction with new test-mass materials promises to reduce the sensitivity limitations from thermal noise in gravitational-wave detectors. The currently most advanced materials under discussion are crystalline silicon as a substrate with amorphous silicon-based coatings. They require, however, operational wavelengths around 2 $\mathrmμ$m to avoid laser absorption. Here, we present a light source at 2128 nm based on a degenerate optical parametric oscillator (DOPO) to convert light from a 1064 nm non-planar ring-oscillator (NPRO). We achieve an external conversion efficiency of $(88.3\,\pm\,1.4)\,\%$ at a pump power of 52 mW in PPKTP (periodically-poled potassium titanyl phosphate, internal efficiency was 94 %), from which we infer an effective non-linearity of $(4.75\,\pm\,0.18)\,\mathrm{pm/V}$. With our approach, light from the established and existing laser sources can be efficiently converted to the 2 $\mathrmμ$m regime, while retaining the excellent stability properties.
