Jianping Li, Jie Liu, Shecheng Gao, Siyuan Yu, Zhaohui Li. Manipulation and Transmission Technologies of Optical Field for Multidimensional Multiplexing Optical Fiber Communication[J]. Acta Optica Sinica, 2019, 39(1): 0126008
- Acta Optica Sinica
- Vol. 39, Issue 1, 0126008 (2019)
![Schematics of modes in each MG for gradient-type refractive index multimode fiber and radial first-order ring-core fiber. (a) Intensity of LP modes in each MG for GI-MMF; (b) intensity of LP modes in each MG for RCF; (c) intensity and phase of OAM modes in each MG for RCF[18]](/richHtml/gxxb/2019/39/1/0126008/img_1.jpg)
Fig. 1. Schematics of modes in each MG for gradient-type refractive index multimode fiber and radial first-order ring-core fiber. (a) Intensity of LP modes in each MG for GI-MMF; (b) intensity of LP modes in each MG for RCF; (c) intensity and phase of OAM modes in each MG for RCF[18]
![(a) RI distribution and (b) cross-sectional diagram of measured GIRCF; calculated (c) effective refractive index distributions and (d) group velocity delays in each MG at C band [31]](/richHtml/gxxb/2019/39/1/0126008/img_2.jpg)
Fig. 2. (a) RI distribution and (b) cross-sectional diagram of measured GIRCF; calculated (c) effective refractive index distributions and (d) group velocity delays in each MG at C band [31]
![(a) Cross-section of quad-mode fiber; (b)-(e) mode field intensity distributions of supported modes; (f) corresponding dispersion curves; (g) experimental system for OAM mode generation and phase distribution verification [48]](/Images/icon/loading.gif){kind=icon}
Fig. 3. (a) Cross-section of quad-mode fiber; (b)-(e) mode field intensity distributions of supported modes; (f) corresponding dispersion curves; (g) experimental system for OAM mode generation and phase distribution verification [48]
Fig. 4. (a) Transmission spectrum of LPFG with mode coupling between LP01 and LP11 modes; (b) intensity profiles and interference patterns of generated LP11 mode and first-order OAM mode [47]
Fig. 5. Period and transmission spectrum of LPFG with four-mode fiber mode coupling between fundamental mode and LP21 mode [48]. (a) Period; (b) transmission spectrum
Fig. 6. Intensity profiles of mode fields and interference patterns of reference Gaussian beams[48]
Fig. 7. Block diagram of RCF-based OAM MDM digital coherent transceiver system[31]
Fig. 8. Diagram of few-mode-fiber-based vector mode division multiplexing system[69]
Fig. 9. Experiment results of OAM mode detection based on one-dimensional GCPPG (insets depicting locations and directions of dark lines) [77]
Fig. 10. Experimental results of high-order vortex beams measured by hyperbolic gradient grating [80]
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