Reconfigurable structured light generation and its coupling to air–core fiber

Yize Liang; Hongya Wang; Xi Zhang; Jianzhou Ai; Zelin Ma; Siddharth Ramachandran; Jian Wang

doi:10.1117/1.APN.2.3.036015

Advanced Photonics Nexus, Volume. 2, Issue 3, 036015(2023)

Reconfigurable structured light generation and its coupling to air–core fiber

Yize Liang^1,2,3, Hongya Wang^1,2,3, Xi Zhang^1,2,3, Jianzhou Ai^1,2,3, Zelin Ma⁴, Siddharth Ramachandran⁴, and Jian Wang^1,2,3、*

Author Affiliations

¹Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Wuhan, China

²Optics Valley Laboratory, Wuhan, China

³Shenzhen Institute of Huazhong University of Science and Technology, Shenzhen, China

⁴Boston University, College of Engineering, Boston, Massachusetts, United States

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Figures & Tables(5)

Fig. 1. (a) Concept of reconfigurable structured light beams generator employing a single SLM loop. (b) HOPS with $l = 1$ . (c) Overlapping degree between polarization distributions of vector beams in initial frames and vector beams in subsequent frames. (d) Experimental setup of reconfigurable structured light beams generator and fiber-coupling system. PC, polarization controller; Col, collimator; BS, beam splitter; PBS, polarization beam splitter; HWP, half-wave plate; QWP, quarter-wave plate; OL, objective lens; CCD, charge-coupled device (Video 1, mp4, 12.2 MB [URL: https://doi.org/10.1117/1.APN.2.3.036015.s1; Video 2, mp4, 12.1 MB [URL: https://doi.org/10.1117/1.APN.2.3.036015.s2).

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Fig. 2. Polarization reconstruction of cylindrical vector beams. Measured intensity profiles of a vector beam with mode order $l = 1$ after propagating through (a) an $x$ -polarized polarizer; (b) a $y$ -polarized polarizer; (c) a $+ 45 \deg$ directional QWP and an $x$ -polarized polarizer; (d) a $+ 45 \deg$ polarizer; (e) a $- 45 \deg$ polarizer; (f) a $+ 45 \deg$ directional QWP and a $y$ -polarized polarizer; (g) intensity profile and polarization distribution of the vector beam with mode order $l = 1$ . Measured intensity profiles of a vector beam with mode order $l = 10$ after propagating through (h) an $x$ -polarized polarizer; (i) a $y$ -polarized polarizer; (j) a $+ 45 \deg$ directional QWP and an $x$ -polarized polarizer; (k) a $+ 45 \deg$ polarizer; (l) a $- 45 \deg$ polarizer; (m) a $+ 45 \deg$ directional QWP and a $y$ -polarized polarizer; (n) intensity profile and polarization distribution of the vector beam with mode order $l = 10$ .

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Fig. 3. Intensity profiles and polarization distributions of diverse seventh-order structured light beams generated in free space. (a), (b) $x$ -polarized OAM beams, insets are interference intensity profiles of them. (c), (d) $x$ -polarized LP beams. (e), (f) Circularly polarized OAM beams, insets are interference intensity profiles of them. (g), (h) Vector beams. (i)–(l) Four different vector beams; insets are intensity profiles of vector beams passing through different directional polarizers.

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Fig. 4. Coupling losses of the fourth to seventh OAM and vector beams. RCP, right circular polarization; LCP, left circular polarization; and XP, $x$ polarization.

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Fig. 5. Diverse seventh-order structured light beams after 5-m air–core fiber transmission, insets above figures (a)–(d) are their interference intensity profiles, respectively. (a), (b) $x$ -polarized OAM beams; (c), (d) circularly polarized OAM beams; and (e)–(h) vector beams.

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Yize Liang, Hongya Wang, Xi Zhang, Jianzhou Ai, Zelin Ma, Siddharth Ramachandran, Jian Wang, "Reconfigurable structured light generation and its coupling to air–core fiber," Adv. Photon. Nexus 2, 036015 (2023)

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Paper Information

Category: Research Articles

Received: Feb. 15, 2023

Accepted: May. 12, 2023

Published Online: Jun. 14, 2023

The Author Email: Wang Jian (jwang@hust.edu.cn)

DOI:10.1117/1.APN.2.3.036015

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology