Kun Zhu, Hui Li, Yongqin Hao, Ran Qian, Dongyue Wang. Design of Grating Structure in Distributed Bragg Reflector Semiconductor Laser[J]. Chinese Journal of Lasers, 2023, 50(11): 1101022
- Chinese Journal of Lasers
- Vol. 50, Issue 11, 1101022 (2023)
Fig. 1. Schematic of plate media
Fig. 2. Structural diagrams of gratings. (a) Rectangular grating with uniform duty cycle; (b) tapered grating with uniform duty cycle
Fig. 3. Schematics of refractive index distributions. (a) Refractive index distribution of uniform grating; (b) refractive index distribution of grating with gradient duty cycle
Fig. 4. Structural diagrams of DBR semiconductor laser including tapered grating with gradient duty cycle. (a) Three-dimensional;(b) two-dimensional
Fig. 5. Reflectance versus duty cycle
Fig. 6. Coupling coefficient versus duty cycle
Fig. 7. Reflection spectra of rectangular grating with gradient duty cycle under different duty cycle ranges
Fig. 8. Reflection spectra of rectangular uniform grating and rectangular grating with gradient duty cycle
Fig. 9. Influence of duty cycle distribution on reflection spectrum. (a) Duty cycle curves with different function distributions;(b) reflection spectra of gratings under duty cycles with different function distributions
Fig. 10. Influence of duty cycle with reduced dimension function distribution on reflection spectrum. (a) Duty cycle curves with different function distributions; (b) reflection spectra of gratings under duty cycles with different function distributions
Fig. 11. Reflectivity versus grating length
Fig. 12. Reflection spectra of rectangular grating with gradient duty cycle and rectangular uniform grating when grating length is 1000 μm. (a) Distribution of gradient duty cycle; (b) reflection spectra of rectangular grating with gradient duty cycle and rectangular uniform grating
Fig. 13. Spectrum of device including rectangular grating with gradient duty cycle
Fig. 14. Far field intensity distributions of devices. (a) Far field distribution of rectangular uniform grating; (b) far field distribution of tapered grating with gradient duty cycle when duty cycle is truncated sinc function distribution
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Table 1. Structural parameters of tapered grating with gradient duty cycle
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Table 2. Structural parameters of rectangular uniform grating
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Table 3. Structural parameters of gratings
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