Narrow linewidth sampled-grating distributed Bragg reflector laser with enhanced side-mode suppression. - Michael C. Larson; Ashish Bhardwaj; W. Xiong; Y. Feng; X. D. Huang; K. P. Petrov; M. Moewe; H. Y. Ji; A. Semakov; C. W. Lv; S. Kutty; A. Patwardhan; et al. (OFC, 2015)