中红外超连续谱具光谱范围宽、功率密度高、平坦性好等特点，且处于大气传输窗口和人眼安全区，在工业、医疗、国防等领域有广阔的应用前景。受到源于随机噪声的调制不稳定影响，目前长脉冲 (ps、ns、CW) 泵浦中红外超连续谱的相干性、稳定性、信噪比等较差，大大限制其应用范围和价值。为解决上述问题，本项目首次开展基于弱CW光调控的长脉冲泵浦中红外超连续谱研究，通过注入弱CW光来抑制调制不稳定作用，增强四波混频效应，显著提高超连续谱相干性、稳定性、信噪比和谱宽度。同时首次对长脉冲泵浦ZBLAN光纤产生的超连续谱中光畸波开展研究，探究光谱中光畸波特性、形成机理，以及弱CW光调控后光畸波的变化规律。本项目研究有望实现在长脉冲泵浦的光纤中获得高相干性、稳定性和信噪比的中红外波段超连续谱光源，同时为紫外、远红外等其它波段的超连续谱研究提供借鉴作用。

Mid-infrared supercontinuum (SC) lies in the atmospheric transmission window and eye-safe range, and the characteristics of broad spectral range, high power density and high spectral flatness, make it has potentially wide applications in industry, medicine, and national defense fields. Affected by modulation instability originated from random noise, the mid-infrared SC pumped by long laser pulse, such as picosecond (ps), nanosecond (ns), continuous wave (CW), suffer from poor coherence, stability, and signal-to-noise ratio (SNR), and the degradation of the SC property greatly limits the applications of mid-infrared SC. This project will carry out a detailed research of mid-infrared SC generation pumped by longer pulses with a weak CW for the first time. The modulation instability can be suppressed by the injected weak CW, and the four-wave mixing effect can be enhanced, and the resulting SC coherence, stability, SNR and spectral width can be greatly improved. We also carry out a detailed research on the related optical rogue waves (ORW) in SC generation in ZBLAN fiber pumped by long laser pulse. The ORW characteristics, formation mechanism, and effects of the weak CW-triggering will be explored. This research project is expected to realize a mid-infrared SC source with high coherence, stability and SNR generation in fiber pumped by longer pulses, and it can also provide some valuable suggestions for researches in ultraviolet and far-infrared SC.