10×10  Gbs directly modulated DFB laser array based on the REC technique.We proposed and experimentally demonstrated a directly modulated distributed feedback (DFB) laser array with a transmission rate of 100 Gbps (10c h a n n e l s×10G b p s).  DFB laser arrays incorporating the REC technique demonstrate excellent consistency performance, with a side-mode suppression ratio exceeding 48 dB, threshold current of approximately 20 mA, and modulation bandwidth of greater than 13 GHz at a bias current of 100 mA.  Based on our experimental results, the proposed DFB laser array is promising to be utilized in the next generation of low-cost, 100 Gbps DWDM communication systems.
DFB
10×10  Gbs directly modulated DFB laser array based on the REC technique.We proposed and experimentally demonstrated a directly modulated distributed feedback (DFB) laser array with a transmission rate of 100 Gbps (10c h a n n e l s×10G b p s).  DFB laser arrays incorporating the REC technique demonstrate excellent consistency performance, with a side-mode suppression ratio exceeding 48 dB, threshold current of approximately 20 mA, and modulation bandwidth of greater than 13 GHz at a bias current of 100 mA. 
The REC technique
The grating design is based on the reconstruction equivalent chirp (REC) technique, which enables precise control of the channel wavelength spacing to 100 GHz, as specified in the ITU-DWDM standard. 
the ITU-DWDM standard