High-power and high-efficiency operation of 1.3 µm-wavelength InP-based photonic-crystal surface-emitting lasers with metal reflector
Yuhki Itoh, Takeshi Aoki, Kosuke Fujii, Hiroyuki Yoshinaga, Naoki Fujiwara, Kenshi Takada, Makoto Ogasawara, Yusuke Sawada, Hideki Yagi, Masaki Yanagisawa, Masahiro Yoshida, Takuya Inoue, Menaka De Zoysa, Kenji Ishizaki, Susumu Noda
Abstract
We demonstrate high-output-power and high-efficiency operation of 1.3-µm-wavelength InP-based photonic-crystal surface-emitting lasers (PCSELs). By introducing a metal reflector and adjusting the phase of the reflected light via optimization of the thickness of the p-InP cladding layer, we successfully achieve an output power of approximately 400 mW with the slope efficiency of 0.4 W/A and the wall-plug efficiency of 20% under CW conditions. In addition, this PCSEL exhibits a narrow circular beam with a divergence angle below 1.6° even at high output powers under CW conditions at temperatures from 15°C to 50°C. We have also demonstrated an output power of over 12 W under pulsed conditions at room temperature.