Directly modulated sampled grating DBR lasers for long-haul WDM communication systems Mason, B. ; Lee, San-Liang ; Heimbuch, M. E. ; Coldren, L. A. Abstract Publication: IEEE Photonics Technology Letters Pub Date: March 1997 DOI: 10.1109/68.556079 Bibcode: 1997IPTL....9..377M