Junhui LI, Hao YAO, Jiayao DENG, Kaixin CHEN. Electro-optic Tunable Grating-assisted Optical Waveguide Directional Coupler in Lithium Niobate on Insulator[J]. Acta Photonica Sinica, 2023, 52(10): 1052417
- Acta Photonica Sinica
- Vol. 52, Issue 10, 1052417 (2023)
Fig. 1. Schematic diagram of the proposed GADC structure
Fig. 2. Dispersion of the q-TE modes calculated as functions of the waveguide width w at 1 550 nm wavelength for different etching depths of he（=150 nm，170 nm，200 nm）
Fig. 3. Transmission spectra of the TMW of the GADC for the E
Fig. 4. Simulated propagation dynamics of the designed GADC at 1 550 nm wavelength
Fig. 5. Photograph of the fabricated GADC chip
Fig. 6. Normalized transmission spectra of our typical fabricated GADC when broadband light at fundamental mode was launched into the TMW and the SMW，respectively
Fig. 7. Output near-field patterns taken at the output of the TMW and the SMW of our typical fabricated GADC
Fig. 8. Photograph of the packaged GADC chip
Fig. 9. Normalized transmission spectra of the TMW of our typical fabricated GADC measured at different tuning voltages and variation of the center wavelength with the tuning voltage
Fig. 10. Normalized transmission spectra of the SMW of our typical fabricated GADC measured at different tuning voltages and variation of the center wavelength with the tuning voltage
Fig. 11. Normalized transmission spectra of the TMW of our typical fabricated GADC measured at different temperature and variation of the center wavelength with the ambient temperature
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