New features of modulational instability of partially coherent light; importance of the incoherence spectrum

Partially coherent Airy beams: A cross-spectral density approach

Airy beams are known for displaying shape invariance and self-acceleration along the transverse direction while they propagate forwards. Although these properties could be associated with the beam coherence, it has been revealed that they also manifest in the case of partially coherent Airy-type. Here, these properties are further investigated by introducing and analyzing a class of partially coherent Airy beams under both infinite and finite energy conditions. The key element within the present approach is the so-called cross-spectral density, which enables a direct connection with the quantu…

Anderson localization of partially-incoherent light

We study Anderson localization and propagation of partially-spatially incoherent wavepackets in linear disordered potentials, motivated by the insight that interference phenomena resulting from multiple scattering are affected by the coherence of the waves. We find that localization is delayed by incoherence: the more incoherent the waves are, the longer they diffusively spread while propagating in the medium. However, if all the eigenmodes of the system are exponentially localized (as in one- and two-dimensional disordered systems), any partially-incoherent wavepacket eventually exhibits loca…

Phasor field waves: A statistical treatment for the case of a partially coherent optical carrier

This paper presents a statistical treatment of phasor fields (P-fields) - a wave-like quantity denoting the slow temporal variations in time-averaged irradiance (which was recently introduced to model and describe non-line-of-sight (NLoS) imaging as well as imaging through diffuse or scattering apertures) - and quantifies the magnitude of a spurious signal which emerges due to a partial spatial coherence of the underlying optical carrier. This spurious signal is not described by the Huygens-like P-field imaging integral which assumes optical incoherence as a necessary condition to describe P-f…

广义通量轨迹：对部分相干艾里（Airy）光束的新认识

Generalized flux trajectories: New insights into partially coherent Airy beams

本文针对部分相干艾里光束相干性与功率下降的效应问题，提出基于傍轴部分相干光束广义通量轨迹的研究方法，阐明光束空间弥散机制，且该方法可适用于任意相干度的结构光束。

分离部分相干光

Separating partially coherent light

本文提出一种基于硅光子电路的层叠自配置干涉仪架构，实现部分相干光的自动分离为正交的相干模式，通过变分处理测量相干矩阵的本征值和本征向量，展示了在不重叠的情况下自动分离互不相干光束的能力。

Linear chirp instability analysis for ultrafast pulse metrology

Pulse train instabilities have often given rise to confusion in misinterpretation in ultrafast pulse characterization measurements. Most prominently known as the coherent artifact, a partially mode-locked laser with non-periodic waveform may still produce an autocorrelation that has often been misinterpreted as indication for a coherent pulse train. Some modern pulse characterization methods easily miss the presence of a coherent artifact, too. Here we address the particularly difficult situation of a pulse train with chirp-only instability. This instability is shown to be virtually invisible …