Cite

    Zheng, J., Zhang, Y., Li, L., Tang, S., Sh, Y., & Chen, X. (2015). an equivalent-stepped-index-coupled DFB semiconductor laser and laser array realized by stepping the duty cycle of the Sampled Bragg grating. Optics & laser technology, 67, 38–43. http://access.bl.uk/ark:/81055/vdc_100057800559.0x000001