Hongjin Liang, Yonggang Zou, Jie Fan, Xiyao Fu, Ke Shi, Kun Tian. Transverse Mode Characteristics Analysis of Semiconductor Laser with High‐Order Surface Curved Gratings[J]. Chinese Journal of Lasers, 2024, 51(8): 0801006
- Chinese Journal of Lasers
- Vol. 51, Issue 8, 0801006 (2024)
Fig. 1. Model diagram of surface high-order curved grating laser
Fig. 2. Schematic of surface high-order curved grating
Fig. 3. Optical field distributions under different modes
Fig. 4. Layer refractive index distribution of simulation model
Fig. 5. Coupling coefficient and normalized intensity versus grating duty cycle
Fig. 6. Coupling coefficient and normalized intensity versus etch depth
Fig. 7. SEM images of curved grating. (a) Surface view 1; (b) surface view 2; (c) sectional view
Fig. 8. Surface high order curved grating semiconductor laser
Fig. 9. Output characteristic curves of device. (a) P-I-V curves; (b) spectrum at 1 A current; (c) spectrum at 2 A current
Fig. 10. Spot patterns at different currents. (a)(b)(c) Curved grating DFB-LD; (d)(e)(f) FP-LD
Fig. 11. Slow axis divergence angles at different currents. (a)(b)(c) Curved grating DFB-LD; (d)(e)(f) FP-LD
Fig. 12. Fast axis divergence angles of curved grating DFB-LD at different currents. (a) 0.5 A; (b) 1.2 A; (c) 2.1 A
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