1State Key Laboratory on Integrated Optoelectronics Lab, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 2Laboratory of Solid State Optoelectronics Information Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 3College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049 4College of Future Technology, University of Chinese Academy of Sciences, Beijing 100049
Abstract：The coupling efficiency of the beam combination and the fiber-coupled module is limited due to the large vertical divergent angle of conventional semiconductor laser diodes. We present a high coupling efficiency module using photonic-band-crystal (PBC) laser diodes with narrow vertical divergent angles. Three PBC single-emitter laser diodes are combined into a fiber with core diameter of 105 μm and numerical aperture of 0.22. A high coupling efficiency of 94.4% is achieved and the brightness is calculated to be 1.7 MW/(cm$^{2}\cdot$sr) with the injection current of 8 A.
2017, Vol. 34 
