Continuous Wave Intracavity Optical Parametric Oscillator using Second Harmonic Generation Noise Suppression.

一个紧凑的连续波（cw）光学参量振荡器（OPO）能够调谐关键的红外吸收特征，是一个理想的工具，用于关键大气污染物，麻醉品和爆炸物的光谱。一个系统，可以结合广泛的可调性和窄线宽允许探测不同的物质与精度。M Squared激光公司已经制造了一种脉冲（宽线宽）OPO，这是一种紧凑、宽可调的光源，并将其与成像仪相结合，产生高光谱图像。挑战是通过制作cw OPO来产生窄线宽。固有的困难是弛豫振荡，这发生在OPO和激光之间的相互作用，当他们共享一个共同的谐振腔。我们建议内置SHG单元来抑制这种情况。

A compact continuous wave (cw) optical parametric oscillator (OPO)capable of tuning over key absorption features in the infrared is a desirable tool for spectroscopy of key atmospheric pollutants, narcotics and explosives. A system that can combine broad tuneability with narrow linewidth allows probing of diverse substances with precision. M Squared Lasers already manufacture a pulsed (broad linewidth) OPO which is a compact, broadly tunable source and combines this with their imager to produce hyperspectral images. The challenge is to produce narrow linewidth by making a cw OPO. The inherent difficult is relaxation oscillations, which occur in the interplay between the OPO and the laser when they share a common resonator. We propose an internal SHG unit to suppress this.