Challenges and Opportunities of Directly Modulated Lasers in Future Data Center and 5G Networks. - Tsurugi Sudo; Yasuhiro Matsui; Glen Carey; Ashish Verma 003; Ding Wang; Viral Lowalekar; Martin Kwakernaak; Ferdous Khan; Nicholas Dalida; Ronak Patel; Alexander Nickel; Bruce Young; et al. (OFC, 2021)