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Appl. Sci. 2016, 6(9), 241; doi:10.3390/app6090241

Generating Radially and Azimuthally Polarized Beams by Using a Pair of Lateral Displacement Beamsplitters

1
Department of Electro-Optical Engineering, National United University, No. 2, Lienda, Nanshi Li, Miaoli 36063, Taiwan
2
Department of Photonics, Feng Chia University, No. 100, Wenhwa Rd., Seatwen, Taichung 40724, Taiwan
3
Institute of Electro-Optical Engineering, National Chiao Tung University, No. 1001, University Rd., Hsinchu 30010, Taiwan
4
Department of Electrical Engineering, Feng Chia University, No. 100, Wenhwa Rd., Seatwen, Taichung 40724, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editors: Malte C. Kaluza and Shoou-Jinn Chang
Received: 27 May 2016 / Revised: 21 August 2016 / Accepted: 23 August 2016 / Published: 27 August 2016
View Full-Text   |   Download PDF [2847 KB, uploaded 27 August 2016]   |  

Abstract

This paper proposes a modified polarization converter for generating radially and azimuthally polarized beams. Based on a Mach–Zehnder-like interferometric structure, the device consists of a pair of lateral displacement beamsplitters (LDBs) and two half-wave plates that manipulate the states of polarization of incident linearly polarized light. Through the coherent superposition of two orthogonal Hermite–Gaussian modes in the far field, radially and azimuthally polarized beams can be obtained simultaneously. A prototype was assembled to demonstrate the feasibility of the design. The proposed design has the advantage of having a simple, symmetric, compact, and robust structure. In addition, the introduction of LDBs substantially reduces the cost of this device. Moreover, the design can be applied to a broadband pulsed laser with considerable potential in high-power applications. View Full-Text
Keywords: beam splitters; waveplates; coherence; interference; polarizations beam splitters; waveplates; coherence; interference; polarizations
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Han, C.-Y.; Wei, Z.-H.; Hsu, Y.; Chen, K.-H.; Yeh, C.-H.; Wu, W.-X.; Chen, J.-H. Generating Radially and Azimuthally Polarized Beams by Using a Pair of Lateral Displacement Beamsplitters. Appl. Sci. 2016, 6, 241.

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