Cylindrical vector beam generator using a two-element interferometer

Electrically switchable cylindrical Fresnel lens based on holographic polymer-dispersed liquid crystals using a Michelson interferometer

Fabricating an electrically switchable cylindrical Fresnel lens based on holographic polymer-dispersed liquid crystals (H-PDLC) using a Michelson interferometer is reported. Simplicity of the method and possibility of fabricating different focal length lenses in a single set up are among the advantages of the method. It is demonstrated that the Fresnel structured zone plate acts as a cylindrical lens and focuses light in one dimension. Its electro-optical switching properties are also studied and it is found that at an applied electric field of E=6 Vrms/μm across the sample, focusing property …

Theoretical analysis on x-ray cylindrical grating interferometer

Grating interferometer is a state of art x-ray imaging approach, which can simultaneously acquire information of x-ray attenuation, phase shift, and small angle scattering. This approach is very sensitive to micro-structural variation and offers superior contrast resolution for biological soft tissues. The present grating interferometer often uses flat gratings, with serious limitations in the field of view and the flux of photons. The use of curved gratings allows perpendicular incidence of x-rays on the gratings, and gives higher visibility over a larger field of view than a conventional int…

通过像散模式转换器实验生成柱矢量模式

Experimental generation of cylindrical vector modes via an astigmatic mode converter

本文提出并实验验证一种结合迈克尔逊干涉仪与π像散模式转换器的紧凑柱矢量光束生成方法，可反转高阶拉盖尔–高斯光束拓扑荷，并将像散模式转换推广至矢量光束。

通过低成本打印二进制全息图生成可调谐圆柱矢量光束

Tunable cylindrical vector beam generation via low-cost printed binary holograms

该研究提出了一种低成本方法，利用打印在醋酸片上的二进制全息图和改进的迈克尔逊干涉仪结合圆柱透镜模式转换器，生成可调谐的圆柱矢量光束，并通过斯托克斯偏振度测量验证了其空间偏振特性，展示了良好的理论一致性。

Arbitrary cylindrical vector beam generation enabled by polarization-selective Gouy phase shifter

Cylindrical vector beams (CVBs), which possesses polarization distribution of rotational symmetry on the transverse plane, can be developed in many optical technologies. Conventional methods to generate CVBs contain redundant interferometers or need to switch among diverse elements, thus being inconvenient in applications containing multiple CVBs. Here we provide a passive polarization-selective device to substitute interferometers and simplify generation setup. It is accomplished by reversing topological charges of orbital angular momentum based on polarization-selective Gouy phase. In the pr…

A phase-stable dual-comb interferometer

Improvements to dual-comb interferometers will benefit precision spectroscopy and sensing, distance metrology, tomography, telecommunications etc. A specific requirement of such interferometers is to enforce mutual coherence between the two combs over the measurement time. With feed-forward relative stabilization of the carrier-enveloppe offset frequencies, we experimentally realize such mutual coherence over times that exceed 300 seconds, two orders of magnitude longer than state-of-the-art systems. Illustration is given with near-infrared Fourier transform molecular spectroscopy, where two c…