Results 211 to 220 of about 2,883 (253)

Coherent beam combining of cylindrical vector beams for power scaling

Optics Letters, 2023
Coherent beam combining (CBC) of cylindrical vector beams (CVBs) based on an active phase controller is proposed and demonstrated. Experimentally, two pieces of spatially variant wave plates (S-wave plate) were employed as vector mode convertors for two individual 1064-nm fiber amplifier channels. When the system was in a closed loop, a combined output
Shixin, Liu, Hang, Liu, Xuepeng, Qi, Wanjing, Peng, Yujun, Feng, Li, Chen, Zhendong, Li, Yinhong, Sun, Yi, Ma, Zhigang, Zhao, Qingsong, Gao, Zhaojun, Liu, Chun, Tang   +12 more
openaire   +2 more sources

Cylindrical vector beams through amplifiers

Solid State Lasers XXVII: Technology and Devices, 2018
Vector beams that carrying orbital angular momentum (OAM) have become ubiquitous and topical in a variety of research fields. The quality of such beams usually degrades while propagating in space. Here, we report a noval technique to improve the quality of vector beams by amplifying these beams through birefringent amplifier.
Andrew Forbes, Darryl Naidoo, Igor Litvin, Nyameko Lisa, Hend Sroor   +4 more
openaire   +1 more source

Cylindrical vector beams for wireless power transfer

2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2017
This article investigates wireless power transfer in the Fresnel zone using cylindrical vector beams. First, a generalized coupling coefficient between two circular apertures in the Fresnel zone is derived. From the generalized coupling coefficient, explicit coupling coefficients between two circular (focused or unfocused) apertures supporting Gaussian,
Faris Alsolamy, Waleed Abdulaziz Alomar, Anthony Grbic   +2 more
openaire   +1 more source

Dark-field imaging with cylindrical-vector beams

Applied Optics, 2006
Dark-field illumination provides an imaging mode that rejects specular light, thereby highlighting edge features. We analyze dark-field imaging by using cylindrical vector beam illumination with a confocal microscope equipped with a microstructure fiber mode filter.
David P, Biss, Kathleen S, Youngworth, Thomas G, Brown   +2 more
openaire   +2 more sources

Optical trapping with cylindrical vector beams

2011 Functional Optical Imaging, 2011
Recent development of cylindrical vector beams prompts its application in optical trapping, which shows more effective and improved trapping efficiency in contrast to the traditional Gaussian beam of spatially homogeneous polarization. Using the T-matrix method and vectorial diffraction theory, we calculated and compared the radiation forces exerted on
null Baoli Yao, null Shaohui Yan, null Ming Lei, null Fei Peng, null Baiheng Ma, null Tong Ye   +5 more
openaire   +1 more source

Cylindrical vector beam sorter with spin-dependent spiral transformation

Optics Letters, 2021
Here, we propose and experimentally demonstrate a cylindrical vector beam (CVB) sorter based on a spin-dependent spiral transformation. By exploiting the spin–orbital interaction of the geometric phase, a pair of conjugated spiral transformations are applied to modulate the two orthogonal circularly polarized components of the CVB, which are converted ...
Ziang Lin, Zhiqiang Xie, Yanliang He, Xinrou Wang, Haisheng Wu, Suiling Wang, Zhiwei Guan, Junmin Liu, Huapeng Ye, Ying Li, Dianyuan Fan, Shuqing Chen   +11 more
openaire   +2 more sources

Optical trapping of nanotubes with cylindrical vector beams

Optics Letters, 2012
We use laser beams with radial and azimuthal polarization to optically trap carbon nanotubes. We measure force constants and trap parameters as a function of power showing improved axial trapping efficiency with respect to linearly polarized beams.
Donato M G, Vasi S, Sayed R, Jones P H, Bonaccorso F, Ferrari A C, Gucciardi P G, Marago O M   +7 more
openaire   +5 more sources

Focusing of high order cylindrical vector beams

Journal of Optics A: Pure and Applied Optics, 2009
We present the results of calculations of focusing high order cylindrical vector beams in the limit of high numerical aperture. We derive a form of the vectorial diffraction integrals for arbitrary radial and azimuthal mode indices and evaluate these numerically for a number of different modes.
Rashid M, Maragò OM, Jones PH
openaire   +3 more sources

Cylindrical vector beam generation from spun fiber

SPIE Proceedings, 2009
Recently there has been considerable interest in the generation of cylindrical vector beams for numerous possible applications in nano-biophotonics, optical imaging, the laser processing of materials and the generation of single photon sources among others.
Henry I. Sztul, Daniel A. Nolan, Giovanni Milione, Xi Chen, Joohyun Koh, Robert R. Alfano   +5 more
openaire   +1 more source

Focusing properties of cylindrical vector vortex beams

Optics Communications, 2018
Abstract In this paper, following Richards and Wolf vectorial diffraction theory, the focusing properties of cylindrical vector vortex beams (CVVB) are investigated, and a diffractive optical element (DOE) is designed to spatially modulate the amplitude of the CVVB.
Zhang Xiaoqiang, Chen Ruishan, Wang Anting   +2 more
openaire   +1 more source