Heng-ying CAO, He-ming CHEN, Xiu-li BAI. Orbital Angular Momentum Modes Generator and Multiplexer Based on Silicon Waveguides[J]. Acta Photonica Sinica, 2019, 48(12): 1248003
- Acta Photonica Sinica
- Vol. 48, Issue 12, 1248003 (2019)
Fig. 1. OAM structure diagram and its trench section
Fig. 2. Concept and principle of OAM generator
Fig. 3. Mode conversion in waveguides
Fig. 4. Conversion efficiency versus different height and width of S waveguide
Fig. 5. Effective index of modes in waveguide versus height of waveguide
Fig. 6. Conversion efficiency of wg1 versus coupling length between different waveguide distances
Fig. 7. Overlap of orthogonal eigenmode at 1 550 nm versus size of trench
Fig. 8. Conversion efficiency of OAM versus trench length
Fig. 9. Detected light field at other ports with TE00 input in Port1, Port2 and Port3, respectively
Fig. 10. Light field of TE00 incident from different ports detected at Port 4 and phase diagrams of OAM±1
Fig. 11. Conversion efficiency of OAM with wavelength of 1.45~1.65 μ m
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Table 1. The insertion loss value of the channels with λ=1 550 nm
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Table 2. The crosstalk value of the channels with λ=1 550 nm
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