High-power, stable single-mode CW operation of 1550 nm wavelength InP-based photonic-crystal surface-emitting lasers
Takeshi Aoki, Yuhki Itoh, Kosuke Fujii, Hiroyuki Yoshinaga, Naoki Fujiwara, Makoto Ogasawara, Yusuke Sawada, Rei Tanaka, Hideki Yagi, Masaki Yanagisawa, Masahiro Yoshida, Takuya Inoue, Menaka De Zoysa, Kenji Ishizaki, Susumu Noda
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.