Related Experiment Video
Updated: May 11, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Experimental generation of partially coherent beams with different complex degrees of coherence
Fei Wang1, Xianlong Liu, Yangsheng Yuan
1School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
Abstract:
We established an experimental setup for generating partially coherent beams with different complex degrees of coherence, and we report experimental generation of an elliptical Gaussian Schell-model (GSM) beam and a Laguerre-GSM beam for the first time. It has been demonstrated experimentally that an elliptical GSM beam and a Laguerre-GSM beam produce an elliptical beam spot and a dark hollow beam spot in the focal plane (or in the far field), respectively, which agrees with theoretical predictions. Our results are useful for beam shaping and particle trapping.
Related Concept Videos
Generating Electromagnetic Radiations
Beams with Symmetric Loadings
The M/EI...
Interference and Diffraction
Propagation of Waves
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Beams with Unsymmetric Loadings
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
Propagation Speed of Electromagnetic Waves

