Narrow-linewidth surface-emitting distributed feedback laser emitting from P-surface

Research Progress of Horizontal Cavity Surface-Emitting Laser

“…A second-order DFB grating is also employed for single-mode emission at 3.8 µm wavelength in a vertical orientation. A ring with an 800 µm diameter generates light output power exceeding 6 mW at 20 In 2021, researchers at the Changchun University of Science and Technology conducted research [39] on a new kind of second-order grating SE-DFB semiconductor laser. By emitting from the p-surface, the laser achieved a narrow linewidth and reduced farfield divergence angle, which was presented in Figure 7.…”

“…By emitting from the p-surface, the laser achieved a narrow linewidth and reduced farfield divergence angle, which was presented in Figure 7. Unlike the conventional n-substrate emitting horizontal cavity SE-DFB semiconductor lasers, the p-surface emitting la- In 2021, researchers at the Changchun University of Science and Technology conducted research [39] on a new kind of second-order grating SE-DFB semiconductor laser. By emitting from the p-surface, the laser achieved a narrow linewidth and reduced far-field divergence angle, which was presented in Figure 7.…”

“…It boasted a 0.94 nm linewidth and 2.6 • × 6.1 • far-field divergence angle, accompanied by a threshold current of 450 mA. In 2021, researchers at the Changchun University of Science and Technology conducted research [39] on a new kind of second-order grating SE-DFB semiconductor laser. By emitting from the p-surface, the laser achieved a narrow linewidth and reduced farfield divergence angle, which was presented in Figure 7.…”