title: Angled cavity photonic crystal laser diodes with tilted sidewalls for improving far-field patterns.
abstract: Angled laser diodes based on the longitudinal photonic band crystal (PBC) waveguide are first proposed and fabricated at a wavelength of 905 nm. Tilted sidewalls are utilized to reflect the light downward, thus enlarging the transverse mode size. In the experiment, continuous wave (CW) output power of 630  mW/facet is achieved, and stable and narrow divergence angles are obtained in the fast and slow axes, simultaneously. The transverse angle is reduced by 44% compared with that of the conventional broad area (BA) laser based on the same wafer, and the lateral angle is only 1.65° with on-axis main-lobe emission. This device shows a promising future for laser emission with ultra-narrow divergence and easy fabrication.
authors: L
authors: L
authors: Liu
authors: Y
authors: Y
authors: Liu
authors: H W
authors: HW
authors: Qu
authors: Y F
authors: YF
authors: Wang
authors: H L
authors: HL
authors: Wang
authors: Z G
authors: ZG
authors: Feng
authors: Y J
authors: YJ
authors: Zhang
authors: W H
authors: WH
authors: Zheng