Yinghao Guo, Mei Liu, Min Tang, Wenhua Ren, Guobin Ren. All-Fiber Mode Selective Coupler Based on Vector Modes[J]. Chinese Journal of Lasers, 2022, 49(3): 0306004
- Chinese Journal of Lasers
- Vol. 49, Issue 3, 0306004 (2022)
Fig. 1. Air-core ring few mode fiber. (a) Cross-sectional refractive index distribution of ACF; (b) effective refractive index difference between high order modes supported by ACF
Fig. 2. Structural diagram of vector MSC
Fig. 3. Effective refractive index of fundamental mode in SMFs with different core radii and matching between fundamental mode in SMF and each high order mode in ACF at 1550 nm wavelength
Fig. 4. Power conversion between fundamental mode
Fig. 5. Power coupling efficiency and coupling length under each condition. (a) Power coupling efficiency versus wavelength and core distance; (b) coupling length versus wavelength and core distance; (c) mode power conversion at point A
Fig. 6. Bandwidth of coupler at each core distance. (a) Bandwidth versus core distance; (b) 3 dB bandwidth versus core distance
Fig. 7. Crosstalk at each core distance. (a) 10 μm; (b) 12 μm
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Table 1. Maximum crosstalk of TE01and TM01versus core distance at C band
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