Fabrication of widely tunable ridge waveguide DBR lasers for WDM-PON Han, Liangshun ; Liang, Song ; Zhang, Can ; Yu, Liqiang ; Zhao, Lingjuan ; Zhu, Hongliang ; Wang, Baojun ; Ji, Chen ; Wang, Wei Abstract Publication: Chinese Optics Letters Pub Date: 2014 DOI: 10.3788/COL201412.091402 Bibcode: 2014ChOpL..12i1402H