Ming Li, Yaobin Li, Pingping Qiu, Weinian Yan, Ruiwen Jia, Qiang Kan. Polarization characteristics of surface grating vertical cavity surface emitting laser[J]. Infrared and Laser Engineering, 2022, 51(5): 20210332
- Infrared and Laser Engineering
- Vol. 51, Issue 5, 20210332 (2022)
Fig. 1. Cross-section schematic diagram of the surface grating VCSEL
Fig. 2. SEM images of the surface grating, which with a period of 700 nm, a duty cycle of 0.5, and an etching depth of about 60 nm. The diameter of the grating area is 5 μm
Fig. 3. Mirror loss varies with the etching depth of the grating
Fig. 4. Polarization test system
Fig. 5. Polarization-resolved light-current characteristics of ordinary VCSEL
Fig. 6. (a) Far-field characteristics, (b) Polarization-resolved P -I curve, (c) Polarization-resolved spectrum, and (d) The distribution of polarization states in the polar coordinate plane of the basic transverse mode surface grating VCSEL
Fig. 7. (a) Polarization-resolved P -I curve, (b) Polarization-resolved spectrum, and (c) Distribution of polarization states in the polar coordinate plane of a multi-transverse mode surface grating VCSEL
Fig. 8. Polarization-resolved P -I curves of surface grating VCSELs in different directions
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