Suguru Yamaoka has been a researcher at NTT Device Technology Labs since 2017. He is involved in directly modulated membrane lasers for high-speed and low-power-consumption operation. In particular, he introduced the new substrate, SiC, into membrane lasers in place of the conventional Si substrate. By combining optical feedback technology that further enhances bandwidth, he has developed 100-GHz-class directly modulated lasers for beyond 400 GbE.
He received his Ph.D. degree in applied physics from Osaka City University, Osaka, Japan, in 2021, where he studied the optical properties of self-trapped excitons in β-Ga2O3.