Polarization Conjugated-Phase Component for Sorting Efficiently Vector Beams by Polarization Topological Charge

IEEE Photonics Journal

Ying Li¹  Dianyuan Fan¹  Xuanke Zeng²  Shuiqin Zheng²  Qinggang Lin²  Shixiang Xu²  Yi Cai²  Guoliang Zheng² 

[1] SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Guangdong, China;Shenzhen Key Lab of Micro-Nano Photonic Information Technology, College of Electronic Science and Technology, Shenzhen University, Shenzhen, China;

关键词: Demultiplexing;    Optical polarization;    Optical fiber communication;    Optical diffraction;    Laser modes;    Optical devices;   

DOI  :  10.1109/JPHOT.2018.2808177

来源: DOAJ

【 摘 要 】

Polarization topological charge (PTC) of a vector beam can be defined as the repetition number of polarization state change along the azimuthal axis, with its sign standing for the rotating direction of the polarization. In this paper, we present a design for PTC sorting of vector beams with polarization conjugated-phase component (PCC). The components, made of birefringent crystals, can induce conjugated spatial phase modulations for the orthogonal polarizations. Our simulations show, using a pair of PCC with specific design in a 4-f optical system, the system focuses vector beam modes on the locations representing the PTC of corresponding mode, and sorts PTC with separation efficiency as high as 77%. Our designs have the potential applications in modal characterization, communication, encryption, and so on.

【 授权许可】

Unknown