Xiaoyong Gao, Yangyang Liu, Guangxi Hu, Liangjun Lu, Haimei Luo. 1×8 Silicon-Based Thermo-Optic Switch Based on Mach-Zehnder Interferometers[J]. Acta Optica Sinica, 2024, 44(8): 0813001
- Acta Optica Sinica
- Vol. 44, Issue 8, 0813001 (2024)
Fig. 1. Schematic of 1×8 optical switch architecture based on tree structure
Fig. 2. Schematic of the structure of 1×2 MZI
Fig. 3. Transmission spectra of different paths, the insets show the electric field distribution of MMI. (a) Transmission spectra of paths 1-2 and 1-3 of 1×2 MMI; (b) transmission spectra of paths 1-3 and 1-4 of 2×2 MMI
Fig. 4. Simulation results of phase variation with input power,the insets show the cross section of thermally shifted phase arm and thermal field simulation results, respectively
Fig. 5. Physical diagrams of optical switch after electrical and optical encapsulation. (a) Gold wire bonding diagram of optical switch chip; (b) packaged optical switch; (c) PCB diagram; (d) substrate structure; (e) physical diagram of optical switch
Fig. 6. External driver for optical switch chip. (a) Physical multi-channel voltage source; (b) connection plate
Fig. 7. Optical switch calibration test system
Fig. 8. Spectra of eight transmission paths and test waveguide for optical switch. (a) Test waveguide; (b) I1-O1; (c) I1-O2; (d) I1-O3; (e) I1-O4; (f) I1-O5; (g) I1-O6; (h) I1-O7; (i) I1-O8
Fig. 9. Transmission spectra for power maximization at target output port of optical switch. (a) I1-O1; (b) I1-O2; (c) I1-O3; (d) I1-O4; (e) I1-O5; (f) I1-O6; (g) I1-O7; (h) I1-O8
Fig. 10. Response time test system of 1×8 TO switch
Fig. 11. Test results of response time of optical switch. (a) 100 Hz; (b) 1 kHz; (c) 5 kHz; (d) 10 kHz
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Table 1. Power consumption of each phase shifter for all paths
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Table 2. Response time test results of thermal phase shifters for optical switch
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Table 3. Comparison of reported TO switching performance
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