Author:
Aoki Takeshi,Itoh Yuhki,Fujii Kosuke,Yoshinaga Hiroyuki,Fujiwara Naoki,Ogasawara Makoto,Sawada Yusuke,Tanaka Rei,Yagi Hideki,Yanagisawa Masaki,Yoshida Masahiro,Inoue Takuya,De Zoysa Menaka,Ishizaki Kenji,Noda Susumu
Abstract
Abstract
1550 nm wavelength photonic-crystal surface-emitting lasers (PCSELs) are attractive for optical communication and eye-safe sensing applications. In this study, we present InP-based PCSELs featuring a double-lattice photonic-crystal structure designed for high-power single-mode operation at a wavelength of 1550 nm. These PCSELs demonstrate output powers exceeding 300 mW under continuous-wave conditions at 25 °C. Additionally, highly stable single-mode oscillation with a side-mode suppression ratio of over 60 dB is verified at temperatures from 15 °C to 60 °C. Measurement and simulation of photonic band structures reveal the impacts of the threshold gain margin and optical coupling coefficient on the single-mode stability.