Changjian Xie, Xihua Zou, Fang Zou, Yong Zhang. High-performance ultra-compact polarization splitter-rotators based on dual-etching and tapered asymmetrical directional coupler[J]. Chinese Optics Letters, 2021, 19(12): 121301
- Chinese Optics Letters
- Vol. 19, Issue 12, 121301 (2021)
Fig. 1. Schematic diagrams of the two proposed PSRs. (a) PSR-1. (b) PSR-2. (c) Cross view.
Fig. 2. Coupling efficiency of PSR-1 varies with the Lc.
Fig. 3. Output powers from the through and cross ports vary with the length of Lc. (a) g = 100 nm, (b) g = 150 nm.
Fig. 4. Conversion efficiency of PSR-1 at the (a) cross port and (b) through port; conversion efficiency of PSR-2 at the (c) cross port and (d) through port.
Fig. 5. Fabrication tolerance of (a) PSR-1 and (b) PSR-2.
Fig. 6. (a) SEM images of the reference waveguide and PSR. (b) Main structure of the PSR.
Fig. 7. Transmission response of the (a) TE0 and (b) TM0 vertical coupling gratings.
Fig. 8. Transmission spectral responses: (a) TM0 mode launched and (b) TE0 mode launched.
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Table 1. Performance Comparison among PSRs (Fabricated Samples)
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