Few-mode vertical-cavity surface-emitting laser: Optional emission of transverse modes with different polarizations. (13th April 2018)

• Record Type: Journal Article
• Authors: Zhong, Chuyu; Zhang, Xing; Hofmann, Werner; Yu, Lijuan; Liu, Jianguo; Ning, Yongqiang; Wang, Lijun
• Is Part Of: Applied physics express. Volume 11:Number 5(2018)
• Publication Date: 2018-04-13
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.11.052702
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: Few-mode vertical-cavity surface-emitting lasers that can be controlled to emit certain modes and polarization states simply by changing the biased contacts are proposed and fabricated. By directly etching trenches in the p-doped distributed Bragg reflector, the upper mesa is separated into several submesas above the oxide layer. Individual contacts are then deposited. Each contact is used to control certain transverse modes with different polarization directions emitted from the corresponding submesa. These new devices can be seen as a prototype of compact laser sources in mode division multiplexing communications systems.