Ricciardi I, Mosca S, Parisi M, Maddaloni P, Santamaria L, De Natale P, De Rosa M
Opt Lett. 2015 Oct 15;40(20):4743-6. doi: 10.1364/OL.40.004743.
We stabilize the idler frequency of a singly resonant optical parametric oscillator directly to the resonance of a mid-infrared Fabry-Perot reference cavity. This is accomplished by the Pound-Drever-Hall locking scheme, controlling either the pump laser or the resonant signal frequency. A residual relative frequency noise power spectral density below 10(3) Hz(2)/Hz is reached on average, with a Gaussian linewidth of 920 Hz over 100 ms, which reveals the potential for reaching spectral purity down to the hertz level by locking the optical parametric oscillator against a mid-infrared cavity with state-of-the-art superior performance.
我们将单共振光学参量振荡器的闲频直接稳定到中红外法布里-珀罗参考腔的共振频率上。这是通过庞德-德雷弗-霍尔锁定方案实现的，该方案可控制泵浦激光器或共振信号频率。平均而言，可实现低于10(3) Hz(2)/Hz的残余相对频率噪声功率谱密度，在100毫秒内高斯线宽为920 Hz，这表明通过将光学参量振荡器锁定到具有先进卓越性能的中红外腔上，有潜力实现低至赫兹级的光谱纯度。
