Measuring topology charge of vortex beam using digital holography | Zendy

Lin Wang | Zendy; Caojin Yuan | Zendy; Nie Shou-Ping | Zendy; Li Chongguang | Zendy; Zhang Hui-li | Zendy; Zhao Yingchun | Zendy; Xiuying Zhang | Zendy; Shaotong Feng | Zendy

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Measuring topology charge of vortex beam using digital holography

Author(s) -

Lin Wang,

Caojin Yuan,

Nie Shou-Ping,

Li Chongguang,

Zhang Hui-li,

Zhao Yingchun,

Xiuying Zhang,

Shaotong Feng

Publication year - 2014

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.63.244202

Subject(s) - topological quantum number , vortex , topology (electrical circuits) , holography , physics , beam (structure) , phase (matter) , optical vortex , optics , charge (physics) , quantum mechanics , mechanics , mathematics , combinatorics

In this paper we propose a method to detect the topology charge of vortex beam using digital holography. Hologram of vortex beam interference with reference beam is recorded, and the phase of vortex beam is reconstructed. The topology charge can be accurately determined by judging the periodicity of reconstructed phase distribution around the phase singularity. The phases of vortex beams generated by numerical simulation and those obtained by experiment of vortex beams with integral and fractional topology charges are compared with each other. The feasibility of the method of detecting the topology charge of vortex beam using digital holography is proved by comparing the results.

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