Advanced Photonics, Volume. 5, Issue 3, 036002(2023)

Propagation of transverse photonic orbital angular momentum through few-mode fiber On the Cover , Author Presentation

Qian Cao1,2,3, Zhuo Chen1, Chong Zhang1, Andy Chong4, and Qiwen Zhan1,2,3、*
Author Affiliations
  • 1University of Shanghai for Science and Technology, School of Optical-Electrical and Computer Engineering, Shanghai, China
  • 2Zhangjiang Laboratory, Shanghai, China
  • 3University of Shanghai for Science and Technology, Shanghai Key Laboratory of Modern Optical System, Shanghai, China
  • 4Pusan National University, Department of Physics, Busan, Republic of Korea
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    Figures & Tables(5)
    Modal decomposition of STOV pulse and focused STOV pulse in LP modes. (a) Spatiotemporal intensity and phase profile of a STOV pulse (l=+1); (b) spatial intensity profile of LP01 and LP11 modes in SMF-28; (c) STOV pulse (l=+1) synthesized by LP modes; (d) complex coefficient for LP modes for synthesizing a STOV pulse. (e) spatiotemporal intensity and phase profile of a focused STOV pulse (l=+1); (f) focused STOV pulse (l=+1) synthesized by LP modes; (g) complex coefficient for LP modes for synthesizing a focused STOV pulse.
    Numerical propagation of focused STOV pulse in few-mode fiber. (a) Unchirped focused STOV pulse; (b) unchirped focused STOV pulse with GVM between LP modes set at zero; (c) unchirped focused STOV pulse with GVD of each LP mode set at zero; (d) chirped focused STOV pulse.
    Schematic for transmitting and measuring STOV pulse through few-mode optical fiber. The system is pumped by a home-built Yb:fiber laser system. One replica of the laser output is spatiotemporally modulated to a STOV pulse. It is then coupled into a few-mode fiber (SMF-28) by a high-NA aspherical lens mounted on a 3D translation stage. Another replica of the laser output is compressed and delay-controlled to serve as a probe pulse to measure the transmitted STOV pulse.
    3D measurement results for positively chirped STOV pulse transmitted by few-mode optical fiber. (a) Topological charge l=+1 and (b) topological charge l=−1. The STOV pulse has an initial GDD of 36,000 fs2 before fiber transmission.
    • Table 1. Propagation parameters for LP01 and LP11 modes of SMF-28.

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      Table 1. Propagation parameters for LP01 and LP11 modes of SMF-28.

      ParameterBrief DescriptionModeValueUnit
      neffEffective refractive index, neff=β/k0LP011.446191
      LP111.443798
      ngEffective group index, ng=c/vg, vg=(β1)1=(β/ω)1LP011.463457
      LP111.463508
      β2GVD coefficient, β2=2β/ω2LP0118.99fs2/mm
      LP1128.61
      ΔTGroup delay difference between LP01 and LP11−170fs/m
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    Qian Cao, Zhuo Chen, Chong Zhang, Andy Chong, Qiwen Zhan, "Propagation of transverse photonic orbital angular momentum through few-mode fiber," Adv. Photon. 5, 036002 (2023)

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    Paper Information

    Category: Research Articles

    Received: Feb. 7, 2023

    Accepted: Mar. 27, 2023

    Posted: Mar. 27, 2023

    Published Online: Apr. 19, 2023

    The Author Email: Qiwen Zhan (qwzhan@usst.edu.cn)

    DOI:10.1117/1.AP.5.3.036002

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