title: High-power vertical-cavity surface-emitting laser with an optimized p-contact diameter.
abstract: A 980 nm bottom-emitting vertical-cavity surface-emitting laser (VCSEL) with a p-contact diameter is reported to achieve high power and good beam quality. A numerical simulation is conducted on the current spreading in a VCSEL with oxidation between the active region and the p-type distributed Bragg reflector. It is found that, for a particular oxide aperture diameter, somewhat homogeneous current distribution can be achieved for a VCSEL with an optimized p-contact diameter. The far-field divergence angle from a 600 microm diameter VCSEL is suppressed from 30 degrees to 15 degrees, and no strong sidelobe is observed in the far-field pattern by using the optimized p-contact diameter. There is a slight rise in threshold and optical output power that is due to the p-contact optimization. By improving the device packaging method, the maximum optical output power of the device is 2.01 W.
authors.affiliation: Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics, and Physics, Chinese Academy of Sciences, 3888 Southeast Lake Road, Changchun 130033, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Ning
authors.forename: Li
authors.initials: L
authors.lastname: Qin
authors.forename: Ye
authors.initials: Y
authors.lastname: Wang
authors.forename: Jinjiang
authors.initials: J
authors.lastname: Cui
authors.forename: Guangyu
authors.initials: G
authors.lastname: Liu
authors.forename: Xing
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhenfu
authors.initials: Z
authors.lastname: Wang
authors.forename: Yanfang
authors.initials: Y
authors.lastname: Sun
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Lijun
authors.initials: L
authors.lastname: Wang
mesh_terms: D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D007909:Lenses; D012031:Refractometry / Q000295:instrumentation*