50 Gb/s Wavelength Tunable DBR Laser Integrated with an Electro-Absorption Modulator

A wavelength tunable DBR laser integrated with an electro-absorption modulator (TEML) operating in the 1.5
$\mu \mathbf{m}$
band was prepared using an InGaAIAs/lnP quantum well structure. At 40 °C, the small signal bandwidth of TEML laser was greater than 28 GHz, and the wavelength tuning range was 12.4 nm. 50 Gb/s data transmission is implemented over the entire wavelength tuning range.