<p>Engineering optical resilience against atmospheric turbulence is essential for robust free-space photonic technologies. Here, we demonstrate that dual partially coherent Bessel-Vortex beams—with engineered topological charge pairing—exhibit unprecedented control over turbulence-induced scintillation beyond what is achievable with single beams or partial coherence alone. Using a spatial light modulator, we generate single and dual partially coherent Bessel-Vortex beams and propagate them through a laboratory turbulence chamber calibrated to Kolmogorov statistics (<InlineEquation ID="IEq1"><EquationSource Format="TEX">\(C_{n}^{2}=7.6 \times {10^{ - 11}}{m^{ - \frac{2}{3}}}\)</EquationSource></InlineEquation>) over a 0.15&#xa0;m path, corresponding to a 1&#xa0;km atmospheric propagation with equivalent turbulence strength <InlineEquation ID="IEq2"><EquationSource Format="TEX">\(C_{{n,{\text{eq}}}}^{2}=1.14 \times {10^{ - 14}}{m^{ - \frac{2}{3}}}\)</EquationSource></InlineEquation>. A key technical innovation of this work is the simultaneous encoding of both the Bessel-Vortex phase profile and the Kolmogorov-distributed random phase onto a single hologram displayed on the SLM—enabling real-time generation of partially coherent structured beams without additional optical components. We find that dual-beam configurations with co-signed topological charges show monotonically increasing resilience with charge difference, whereas counter-signed pairs display a pronounced non-monotonic response with minimal resistance at Δm = 8. Most strikingly, beams with equal-magnitude opposite charges (|m₁| = |m₂|) exhibit monotonic degradation in resilience up to order 14—a behavior absent in single-vortex systems. These results establish dual topological charge pairing as a previously unexplored design parameter for turbulence-resilient optical systems, with direct implications for free-space optical communication, quantum information transfer, and high-precision optical manipulation.</p>

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Engineering turbulence resilience in Bessel-Vortex beams through partial coherence and topological charge pairing

  • Jalil Jafari Dashkasan,
  • Rasoul Aalipour,
  • Mohammad Yeganeh

摘要

Engineering optical resilience against atmospheric turbulence is essential for robust free-space photonic technologies. Here, we demonstrate that dual partially coherent Bessel-Vortex beams—with engineered topological charge pairing—exhibit unprecedented control over turbulence-induced scintillation beyond what is achievable with single beams or partial coherence alone. Using a spatial light modulator, we generate single and dual partially coherent Bessel-Vortex beams and propagate them through a laboratory turbulence chamber calibrated to Kolmogorov statistics (\(C_{n}^{2}=7.6 \times {10^{ - 11}}{m^{ - \frac{2}{3}}}\)) over a 0.15 m path, corresponding to a 1 km atmospheric propagation with equivalent turbulence strength \(C_{{n,{\text{eq}}}}^{2}=1.14 \times {10^{ - 14}}{m^{ - \frac{2}{3}}}\). A key technical innovation of this work is the simultaneous encoding of both the Bessel-Vortex phase profile and the Kolmogorov-distributed random phase onto a single hologram displayed on the SLM—enabling real-time generation of partially coherent structured beams without additional optical components. We find that dual-beam configurations with co-signed topological charges show monotonically increasing resilience with charge difference, whereas counter-signed pairs display a pronounced non-monotonic response with minimal resistance at Δm = 8. Most strikingly, beams with equal-magnitude opposite charges (|m₁| = |m₂|) exhibit monotonic degradation in resilience up to order 14—a behavior absent in single-vortex systems. These results establish dual topological charge pairing as a previously unexplored design parameter for turbulence-resilient optical systems, with direct implications for free-space optical communication, quantum information transfer, and high-precision optical manipulation.