Publications and Talks

Here is a selected list of research publications where I played a leading role. You can also find the full list of my publications on my Google Scholar profile.

Selected Journal Articles (Peer-Reviewed)

• [Invited] Automatic Turbulence Resilience in Pilot-Assisted Self-Coherent Free-Space Optical Communications
  R. Zhang, X. Su, H. Song, H. Zhou, M. Tur, and A. E. Willner
  Journal of Lightwave Technology, vol: 42, no. 3, pp: 3760 - 3769, 2024.
• Turbulence-Resilient Differential-Phase-Shift-Keying Free-Space Optical Communications Using Automatic Multi-Mode Optoelectronic Mixing
  R. Zhang, K. Zou, X. Su, Y. Duan, H. Zhou, H. Song, H. Song, A. Minoofar, N. Hu, K. Pang, R. W. Boyd, M. Tur, and A. E. Willner
  Optics Communications, vol: 534, 129330, 2023.
• Turbulence-Resilient Pilot-Assisted Self-Coherent Free-Space Optical Communications Using Automatic Optoelectronic Mixing of Many Modes
  R. Zhang, N. Hu, H. Zhou, K. Zou, X. Su, Y . Zhou, H. Song, K. Pang, H. Song, A. Minoofar, Z. Zhao, C. Liu, K. Manukyan, A. Almaiman, B. Lynn, R. W. Boyd, M. Tur, and A. E. Willner
  Nature Photonics, vol: 15, no. 10, pp: 743-750, 2021.
  [Press Release] This work has also been covered by various media, including Science Daily and Phys Org.
• [Invited] Demonstration of Turbulence Resiliency in a Mode-, Polarization-, and Wavelength- Multiplexed Free-Space Optical Link Using Pilot-Assisted Optoelectronic Beam Mixing
  H. Zhou*, R. Zhang*, H. Song, N. Hu, H. Song, K. Zou, X. Su, Z. Zhao, K. Pang, A. Almaiman, C. Liu, A. Minoofar, B. Lynn, D. Park, M. Tur, and A. E. Willner
  Journal of Lightwave Technology, vol: 40, no. 3, pp: 588-596, 2022. Contributed equally.
• Utilizing Adaptive Optics to Mitigate Intra-Modal-Group Power Coupling of Graded-Index Few-Mode Fiber in a 200-Gbit/s Mode-Division-Multiplexed Link
  R. Zhang, H. Song, H. Song, Z. Zhao, G. Milione, K. Pang, J. Du, L. Li, K. Zou, H. Zhou, C. Liu, K. Manukyan, N. Hu, A. Almaiman, J. Stone, M. J. Li, B. Lynn, R. W. Boyd, M. Tur, and A. E. Willner
  Optics Letters, vol: 45, no. 12, 2020.
• Simultaneous Turbulence Mitigation and Channel Demultiplexing for Two 100-Gbit/s Orbital-Angular-Momentum Multiplexed Beams by Adaptive Wavefront Shaping and Diffusing
  R. Zhang, H. Song, Z. Zhao, H. Song, J. Du, C. Liu, K. Pang, L. Li, H. Zhou, A. N. Willner, A. Almaiman, Y. Zhou, R. W. Boyd, B. Lynn, R. Bock, M. Tur, and A. E. Willner
  Optics Letters, vol: 45, pp: 702-705, 2020.
• Coherent Optical Wireless Communication Link Employing Orbital Angular Momentum Multiplexing in a Ballistic and Diffusive Scattering Medium
  R. Zhang, L. Li, Z. Zhao, G. Xie, G. Milione, H. Song, P. Liao, C. Liu, H. Song, K. Pang, A. N. Willner, B. Lynn, R. Bock, M. Tur, and A. E. Willner
  Optics Letters, vol: 44, pp: 691-694, 2019.
• Mitigation for Turbulence Effects in a 40-Gbit/s Orbital-Angular-Momentum-Multiplexed Free-Space Optical Link Between a Ground Station and a Retro-Reflecting UAV Using MIMO Equalization
  L. Li, R. Zhang, P. Liao, Y. Cao, H. Song, Y. Zhao, J. Du, Z. Zhao, C. Liu, K. Pang, H. Song, A. Almaiman, D. Starodubov, B. Lynn, R. Bock, M. Tur, A. F. Molisch, and A. E. Willner
  Optics Letters, vol: 44, pp: 5181-5184, 2019.
  [Editors’ Pick] 6 out of 73 papers in that issue of Optics Letters.
• Athermal Narrow Band Filters based on Side-Modulated Bragg Gratings
  J. Chen, R. Zhang, and Y. Shi
  IEEE Photonics Technology Letters, vol: 30, no: 13, 2018.
• High-Capacity Free-Space Optical Communications Between a Ground Transmitter and a Ground Receiver via a UAV Using Multiplexing of Multiple Orbital-Angular-Momentum Beams
  L. Li*, R. Zhang*, Z. Zhao, G. Xie, P. Liao, K. Pang, H. Song, C. Liu, Y. Ren, G. Labroille, P. Jian, D. Starodubov, B. Lynn, R. Bock, M. Tur, and A. E. Willner
  Scientific Reports, vol: 7, no. 1, pp: 17427, 2017. Contributed equally.

Selected Conference Proceedings and Talks (Peer-Reviewed)

• [Invited] Turbulence-Robust Free-Space Optical Transmission Assisted by a Pilot Beam
  R. Zhang and A. E. Willner
  Advanced Photonics Congress, paper NeM4B.3, Busan, Republic of Korea, 2023.
• [Invited] Automatic Turbulence Resilience in Self-Coherent Free-Space Optical Communications
  R. Zhang, X. Su, H. Song, H. Zhou, M. Tur, and A. E. Willner
  IEEE/Optica Conference on Optical Fiber Communications (OFC), paper M1J.4, San Diego, CA, USA, 2023.
• Turbulence-Resilient 2.25-Gbit/s DPSK Self-Coherent Free-Space Optical Communication Link Using Automatic Optoelectronic Mixing of Many Spatial Modes
  R. Zhang, K. Zou, X. Su, Y. Duan, H. Zhou, H. Song, H. Song, A. Minoofar, N. Hu, K. Pang, R. W. Boyd, M. Tur, and A. E. Willner
  APS/IEEE/Optica Conference on Lasers and Electro-Optics (CLEO), paper STh2M. 4, San Jose, CA, USA, 2023.
• Experimental Demonstration of Crosstalk Reduction to Achieve Turbulence-Resilient Multiple-OAM-Beam Free-Space Optical Communications Using Pilot Tones to Mix Beams at the Receiver
  R. Zhang, N. Hu, K. Zou, H. Zhou, X. Su, Z. Zhao, H. Song, H. Song, A. Almaiman, K. Pang, C. Liu, B. Lynn, M. Tur, and A. E. Willner
  APS/IEEE/Optica Conference on Lasers and Electro-Optics (CLEO), paper SW4L.4, San Jose, CA, USA, 2020.
• Alignment Monitor for Free-Space Optical Links in the Presence of Turbulence Using the Beating of Opposite-Order Orbital-Angular Momentum Beams on Two Different Wavelengths
  R. Zhang, N. Hu, X. Su, A. Almaiman, H. Song, Z. Zhao, H. Song, K. Pang, C. Liu, M. Tur, and A. E. Willner
  IEEE/Optica Conference on Optical Fiber Communications (OFC), paper Th1K.6, San Diego, CA, USA, 2020.
• Experimental Demonstration of Utilizing Adaptive Optics to Mitigate Intra-Modal-Group Power Coupling of Few-Mode-Fiber in a Two-Channel 20-Gbit/s QPSK Mode-Division-Multiplexed System
  R. Zhang, H. Song, H. Song, Z. Zhao, K. Pang, J. Du, K. Zou, C. Liu, H. Zhou, K. Manukyan, M. Tur, and A. E. Willner
  European Conference on Optical Communications (ECOC), paper W.3.C.2, Dublin, Ireland, 2019.
• Scattered Complex Laguerre-Gaussian Spectrum to Determine the 2-D Transverse Position of a Spherical Silica Particle
  R. Zhang, H. Song, Z. Zhao, H. Song, J. Du, G. Xie, L. Li, K. Pang, C. Liu, A. Almaiman, S. Zach, N. Cohen, M. Tur, and A. E. Willner
  APS/IEEE/Optica Conference on Lasers and Electro-Optics (CLEO), paper JTu2A.57, San Jose, CA, USA, 2019.
• Demonstration of Independent Turbulence Mitigation of Two 100-Gbit/s QPSK Orbital-Angular-Momentum Multiplexed Beams using Wavefront Shaping and Controlled Scattering
  R. Zhang, H. Song, Z. Zhao, H. Song, J. Du, C. Liu, K. Pang, L. Li, A. N. Willner, R. W. Boyd, M. Tur, and A. E. Willner
  IEEE/Optica Conference on Optical Fiber Communications (OFC), paper W4A.4, San Diego, CA, USA, 2019.
• Experimental Effect of Scattering on an 80-Gbit/s QPSK Wireless Link using 4 Orbital-Angular-Momentum Beams
  R. Zhang, L. Li, Z. Zhao, G. Xie, P. Liao, H. Song, C. Liu, H. Song, K. Pang, R. Bock, M. Tur, and A. E. Willner
  IEEE/Optica Conference on Optical Fiber Communications (OFC), paper Tu2I.5, San Diego, CA, USA, 2018.

Book Chapters

• High-capacity Free-space Optical Communications Using Multiplexing of Multiple OAM Beams
  A. E. Willner, R. Zhang, K. Pang, H. Song, C. Liu, H. Song, X. Su, H. Zhou, N. Hu, Z. Zhao, G. Xie, Y. Ren, H. Huang, and M. Tur
  Electromagnetic Vortices: Wave Phenomena and Engineering Applications, First Edition. Chapter 12, Wiley, Dec. 2021, ISBN: 978-1-119-662-822.
• Causes and Mitigation of Modal Crosstalk in OAM-Multiplexed Optical Communication Links
  A. E. Willner, H. Song, C. Liu, R. Zhang, K. Pang, H. Zhou, N. Hu, H. Song, X. Su, Z. Zhao, M. Tur, H. Huang, G. Xie, and Y. Ren
  Structured Light and Optical Communication, First Edition, Chapter 10, Elsevier Science, May 2021, ISBN: 978-0-128-21510-4.