Chinese Journal of Physics, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 1, 2024
Language: Английский
Optica, Journal Year: 2024, Volume and Issue: 11(5), P. 595 - 595
Published: April 3, 2024
Characterizing the orbital-angular-momentum (OAM) modes is critically important for OAM-encoded data transfer. However, traditional characterizing approaches rely on either complex and precise experimental configurations or complicated prior information processing. In these scenarios, correlation features of OAM-dependent speckles from scattering effect have received little attention. Here, we investigate cross-correlation characteristics OAM resulting a medium propose an appealing alternative spatial mode sorting demultiplexing based speckles. We demonstrate theoretically experimentally that operation between two different can uniformly derive annulus pattern, whose dimension determined by absolute topological charge difference value corresponding modes. Based this mechanism, original coherent be easily sorted implementing incoherently measured To fully capitalize orthogonal feature speckles, also construct experiments using ground glass diffuser, where both 8-bit grayscale 24-bit RGB are successfully demonstrated with superior error rates. Results show previously treated as nuisance practical applications, surprisingly utilized competitive candidate demultiplexing, thus opening new directions in optical communication
Language: Английский
Citations
9
Optics & Laser Technology, Journal Year: 2025, Volume and Issue: 189, P. 113074 - 113074
Published: May 5, 2025
Language: Английский
Citations
1
Laser & Photonics Review, Journal Year: 2024, Volume and Issue: 18(9)
Published: April 18, 2024
Abstract The optical coordinate transformation based on the ray model can flexibly and efficiently complete manipulation of complex light fields through a pair phase plates, is successfully used to sort orbital angular momentum (OAM) light. Generally, modulation required by derived analytically under paraxial approximation, however, this would induce error, thus worsen quality transformed beam. Here, non‐paraxial design for spiral proposed, where unwrapper obtained numerically solving partial differential equations mapping corrector spectrum diffraction integral method. Due more accurate modulation, effectively improves beam quality, realizes demultiplexing OAM modes with higher efficiency lower cross‐talk. proposed approach verified compact metasurface‐based vortex mode sorter, which extensible toward OAM‐based multi‐mode systems involving classical quantum information processing.
Language: Английский
Citations
6
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 5, 2025
Abstract Hybrid‐order Poincaré beams (HyOPBs) with complex transverse polarization states hold significant potential in optical communication and quantum information. Fully characterizing the parameters of HyOPBs is a key task to accelerate applications. Conventional methods typically require mapping multiple reconstructing point by point, creating fundamental bottleneck for fast measurement real‐time monitoring parameters. In this work, single‐shot characterization scheme demonstrated applying diffractive neural networks system cascaded metasurfaces. The designed metasurfaces essentially function as an processor, efficiently extracting high‐dimensional spatial modes amplitude Whereafter, are accurately predicted, correctly reconstructed help electronic deep networks. This innovative approach validated through series simulation studies average reconstruction errors <2.68% σ 1.84% θ, respectively. work provides effective strategy precise, compact, detection HyOPBs, paving way their application next generation high‐capacity systems.
Language: Английский
Citations
0
APL Photonics, Journal Year: 2025, Volume and Issue: 10(3)
Published: March 1, 2025
Frequency conversion via nonlinear optical processes is crucial for applications in both quantum and classical optics. As well known, the process a laser cavity can greatly enhance efficiency has been widely used second harmonic generation (SHG) of Gaussian mode. However, generally only support limited number resonant modes, direct application arbitrary vector fields within impractical due to this constraint. Here, based on nested-ring digital cavity, we use two orthogonally placed crystals then successfully achieve cavity-enhanced frequency manipulation fields. Compared extra-cavity method, our configuration enhances SHG by over 80 times. This method extends from mode Our enriches available toolkit opens up new possibilities related areas.
Language: Английский
Citations
0
Science China Physics Mechanics and Astronomy, Journal Year: 2025, Volume and Issue: 68(6)
Published: April 18, 2025
Language: Английский
Citations
0
Nanoscale, Journal Year: 2024, Volume and Issue: 16(18), P. 8807 - 8819
Published: Jan. 1, 2024
This review focuses on the study of encryption, multiplexing and demultiplexing vortex beams based nanostructure platforms.
Language: Английский
Citations
3
Journal of Lightwave Technology, Journal Year: 2024, Volume and Issue: 42(20), P. 7357 - 7367
Published: July 3, 2024
Language: Английский
Citations
2
Chinese Physics Letters, Journal Year: 2024, Volume and Issue: 41(9), P. 094202 - 094202
Published: Aug. 4, 2024
Abstract Cylindrical vector beams (CVBs) hold significant promise in mode division multiplexing communication owing to their inherent orthogonality. However, existing studies for facilitating CVB channel processing are confined shift conversions due reliance on spin-dependent helical modulations, overlooking the pursuit of multiplication conversion. This challenge lies multiplicative operation upon inhomogeneous manipulation, which is expected advance versatile switching and routing. Here, we tackle this gap by introducing a raytracing control strategy that conformally maps light rays from whole annulus distribution an annular sector counterpart. Incorporated with multifold conformal annulus-sector mappings polarization-insensitive phase approach facilitates parallel transformation input into multiple complementary components, enabling conversion protected structure. Serving as demonstration, experimentally implemented four modes multiplier factors N = +2 –3, achieving converted purities over 94.24% 88.37%. Subsequently, 200 Gbit/s quadrature keying signals were successfully transmitted channels, bit-error-rate approaching 1 × 10 −6 . These results underscore our strategy’s efficacy multiplication, may open promising prospects its advanced applications.
Language: Английский
Citations
0
Chinese Journal of Physics, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 1, 2024
Language: Английский
Citations
0