Brightness improvement of edge-emitting lasers by combining vertical broad-area HiBBEE and laterally inhomogeneous waveguides
Cheng-Kun Wu,
Xiao-E. Xue,
Si-Cong Tian,
Md. Jarez Miah,
André Strittmatter,
Dieter Bimberg
Affiliations
Cheng-Kun Wu
Bimberg Chinese-German Center for Green Photonics and Key Laboratory of Luminescence Science and Technology, Chinese Academy of Sciences and State Key Laboratory of Luminescence Science and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Xiao-E. Xue
Bimberg Chinese-German Center for Green Photonics and Key Laboratory of Luminescence Science and Technology, Chinese Academy of Sciences and State Key Laboratory of Luminescence Science and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Si-Cong Tian
Bimberg Chinese-German Center for Green Photonics and Key Laboratory of Luminescence Science and Technology, Chinese Academy of Sciences and State Key Laboratory of Luminescence Science and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Md. Jarez Miah
Institute of Information and Communication Technology, Bangladesh University of Engineering and Technology, 1205 Dhaka, Bangladesh
André Strittmatter
Otto-von-Guericke University Magdeburg, 39106 Magdeburg, Germany
Dieter Bimberg
Bimberg Chinese-German Center for Green Photonics and Key Laboratory of Luminescence Science and Technology, Chinese Academy of Sciences and State Key Laboratory of Luminescence Science and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
1060 nm high-brightness vertical broad-area edge-emitting (HiBBEE) lasers with laterally inhomogeneous ridge waveguides are investigated. The effects of triangular, fishbone, and square-shaped corrugations on the loss of fundamental and higher-order modes are calculated by the beam propagation method. Lasers with 15 µm ridge width, 2 mm cavity length, and various types of corrugations are fabricated. The combination of vertical broad-area and fishbone- and square-shaped corrugations yields excellent beam quality, with beam quality factors M2 ≤ 1.5 and 2.6 in vertical and lateral directions, respectively. Despite the loss in output power due to the increased losses incurred by the corrugations, corrugated lasers provide higher brightness than the reference laser with a conventional straight ridge waveguide. HiBBEE lasers with square-shaped corrugated ridges provide 1.7 times larger brightness than the reference lasers.
