Acta Photonica Sinica, Volume. 52, Issue 7, 0713001(2023)
Scalable Multimode Waveguide Bend Based on Tapered Couplers
Figures & Tables(11)
Fig. 1. The schematic diagram of the proposed multimode waveguide bend，a detailed drawing of the tapered coupler，cross-sectional view of the coupling region
Fig. 2. Calculated effective refractive indices of eigenmodes in a silicon strip waveguide changing with the waveguide width
Fig. 4. Simulated light propagation in the designed multimode waveguide bend with input TE0、TE1、TE2、TE3 and TE4 modes at an operating wavelength of 1 550 nm
Fig. 5. Simulated transmission spectra of the designed multimode waveguide bend
Fig. 6. Transmission efficiency of the designed multimode waveguide bend changing with ΔW at 1 550 nm
Fig. 7. Transmission efficiency of the designed multimode waveguide bend changing with ΔH at 1 550 nm
Fig. 8. Microscopic image of the fabricated multimode waveguide bend
Fig. 9. Measured transmission spectra of the fabricated multimode waveguide bend
Table 1. Optimized widths of the tapered waveguide at each stage
View tableView in ArticleTable 1. Optimized widths of the tapered waveguide at each stage
Stage Symbol Value/μm Symbol Value/μm Symbol Value/μm Symbol Value/μm Stage4 L41 1.70 L42 1.69 L43 1.67 L44 1.62 L45 1.61 L46 1.57 L47 1.56 L48 1.54 L49 1.52 L410 1.48 L411 1.43 L412 1.40 Stage3 L31 1.40 L32 1.38 L33 1.34 L34 1.25 L35 1.22 L36 1.19 L37 1.16 L38 1.12 L39 1.08 L310 1.05 Stage2 L21 1.05 L22 1.02 L23 1.01 L24 0.97 L25 0.94 L26 0.91 L27 0.86 L28 0.83 L29 0.80 L210 0.78 L211 0.75 Stage1 L11 0.75 L12 0.73 L13 0.69 L14 0.68 L15 0.65 L16 0.60 L17 0.58 L18 0.52 L19 0.45
Table 2. A comparison of the presented multimode waveguide bend with other reported multimode waveguide bends
View tableView in ArticleTable 2. A comparison of the presented multimode waveguide bend with other reported multimode waveguide bends
Ref. Modes Effective radius/µm Simulation Measurement IL/dB CT/dB BW/nm IL/dB CT/dB BW/nm 10 2 5 <0.12 <-23.00 1 500~1 600 <0.20 <-22.00 1 500~1 600 11 4 10 <0.13 <-29.00 1 500~1 600 <0.72 <-25.00 1 520~1 600 12 4 45 <0.10 <-25.00 1 500~1 600 <0.50 <-20.00 1 520~1 610 13 4 30 <0.44 <-20.00 1 500~1 600 <1.00 <-20.00 1 520~1 600 14 2 3.6 <0.70 <-25.00 1 520~1 580 <0.80 <-24.00 1 520~1 580 15 3 3.9 <0.84 <-20.00 1 520~1 600 <0.95 <-20.00 1 520~1 600 16 3 10 <0.5 <-30.00 1 500~1 600 <0.7 <-22.00 1 520~1 600 17 4 5.6 <0.46 <-18.00 1 500~1 600 <1.00 <-14.00 1 510~1 580 This work 5 10 <0.78 <-19.03 1 500~1 600 <4.00 <-10.35 1 520~1 600
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Jian LIN, Yuxiao LIU, Qiang FU, Jun LI, Pengjun WANG, Weiwei CHEN. Scalable Multimode Waveguide Bend Based on Tapered Couplers[J]. Acta Photonica Sinica, 2023, 52(7): 0713001
Paper Information
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Received: Jan. 4, 2023
Accepted: Mar. 6, 2023
Published Online: Sep. 26, 2023
The Author Email: Weiwei CHEN (chenweiwei@nbu.edu.cn)
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