基于zigzag板条多通放大窄线宽脉冲固体超荧光光源研究

超荧光（SF）具有光谱连续、无弛豫振荡、无模跳、输出稳定等优点，因此在光学层析、光谱检测、材料加工等众多领域有着广泛的应用前景。基于ziazag板条角度选通特性，本课题提出经不同选通角多次通过单一板条增益模块实现超高的增益放大、同时有效地避免了残余回光自激，旨在对该新方法产生窄线宽脉冲SF光源进行探索性研究。针对Nd:YAG和Nd:YVO4两种板条增益介质，研究分析准连续泵浦和被动调Q下SF输出功率、脉冲形状、脉宽、峰值功率、光谱中心及线宽等特性规律。通过本课题研究，不但可以深化对固体SF特征的认识，也对窄线宽脉冲SF光源产生研究具有重要意义。

Superfluorescence (SF) has continuous spectra, no relaxation oscillation, no mode jitter and high temporal stability, thus playing a significant role in many applications, such as optical coherence tomography, spectroscopy and materials processing. Here, based on the angular multiplexing nature of the zigzag slab, we propose a new approach to achieve an ultra-high gain while avoiding unwanted self-lasing caused by the residual optical-feedback for generating narrow-linewidth, pulsed SF sources in a multiple-pass amplifier system. In this project, the output property of the SF will be studied for both Nd:YAG and Nd:YVO4 slab gain mediums, including the output power, pulse shape, pulse duration, peak power, spectral center-wavelength and linewidth under the quasi-continuous-wave pumping and passive Q-switching mechanism. Through this project, we can not only deepen the acknowledgement to the characteristics of solid-state SF, but also promote the design concepts of narrow-linewidth, pulsed SF sources.