论文标题
孤子动力学的两光子成像
Two-photon imaging of soliton dynamics
论文作者
论文摘要
在非线性系统中相互作用的光学孤立波（孤子）可以结合并形成类似于分子的结构。这一过程的丰富动力已经提出了对快速光谱表征的需求，以加深对孤子物理学的理解，具有许多实际的影响。在这里，我们展示了具有完全不同步激光器的孤子分子（SM）的两光子成像，其中与常规成像技术相比，波长和带宽约束相比得到了相当大的限制。两光子检测使探针和测试的振荡器能够在完全不同的波长下运行，这使得允许成熟的近红外激光技术可用于快速研究新兴的长波长激光源。作为演示，使用1550 nm的探针激光器，我们会在1800-2100 nm范围内对孤子单元的行为进行图像，并捕获不断发展的多运动SM的丰富动力学。该技术可能被证明是一种必不可少的，易于实施的诊断工具，用于检测松散结合的SM的存在，由于工具分辨率或带宽的限制，通常不会忽略它。
Optical solitary waves (solitons) that interact in a nonlinear system can bind and form a structure similar to a molecule. The rich dynamics of this process have created a demand for rapid spectral characterization to deepen the understanding of soliton physics with many practical implications. Here, we demonstrate stroboscopic, two-photon imaging of soliton molecules (SM) with completely unsynchronized lasers, where the wavelength and bandwidth constraints are considerably eased compared to conventional imaging techniques. Two-photon detection enables the probe and tested oscillator to operate at completely different wavelengths, which permits mature near-infrared laser technology to be leveraged for rapid SM studies of emerging long-wavelength laser sources. As a demonstration, using a 1550 nm probe laser we image the behavior of soliton singlets across the 1800-2100 nm range, and capture the rich dynamics of evolving multiatomic SM. This technique may prove to be an essential, easy-to-implement diagnostic tool for detecting the presence of loosely-bound SM, which often remain unnoticed due to instrumental resolution or bandwidth limitations.
