The critical external feedback ratio for coherence collapse in a quantum dot laterally loss coupled distributed feedback (QD LLC DFB) laser is determined to be -14 dB by RIN measurements. Under 2.5 Gbps modulation, the SNR in the QD DFB starts to degrade at a feedback ratio of -30 dB, about 20 dB higher than the value of a typical QW DFB, although the change in RMS jitter is not much different in these two devices. The physical contributions to the high external feedback resistance of the QD LLC DFB would be the low linewidth enhancement factor, high damping rate, HR/HR facet coatings and loss-coupled grating.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    External feedback effects on a quantum dot laterally loss coupled distributed feedback laser


    Contributors:
    Su, H. (author) / Malloy, K.J. (author) / Lester, L.F. (author) / Zhang, L. (author) / Gray, A.L. (author) / Wang, R. (author) / Newell, T.C. (author)


    Publication date :

    2003-01-01


    Size :

    125875 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Laterally Coupled Distributed-Feedback Lasers

    Lang, Robert J. / Forouhar, Siamak / Tiberio, Richard C. et al. | NTRS | 1992


    Laterally coupled dual wavelength distributed feedback lasers

    Pozzi, Francesca / De La Rue, Richard M. / Sorel, Marc | SPIE | 2006


    Laterally Coupled Distributed Feedback Laser with Dry-Etched Deep Gratings

    Yi Luo, / Jian Wang, / Jian-Bo Tian, et al. | IEEE | 2005


    Effects of grating order and tooth rounding in laterally coupled distributed feedback lasers

    Millett, R. / Schriemer, H. / Hall, T. et al. | British Library Online Contents | 2008