Distributed feedback (DFB) lasers that are widely used in high-speed communication nowadays usually use end-facet coating in order to seek a balance between fabrication difficulty and device performance. This paper investigates DFB lasers with a partial grating structure that is immune to the phase uncertainties at the end-facet with high-reflection (HR) film and the improvement of its output chirp characteristics. It is found that, after parameter optimization, the carrier concentration and photon density distribution along the partial grating DFB(PG-DFB) laser cavity can be more uniform, which helps to obtain a better production yield. In addition, a compromised choice of the length of grating region and non-grating region can ensure stable single-mode output, as well as sub-10 mA threshold and high slope efficiency (SE). We also find that the PG-DFB laser can reduce the transient chirp by about 5 GHz compared to conventional DFB laser with uniform grating.


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    Titel :

    Performance enhancement of distributed feedback laser with a partial grating


    Beteiligte:
    Xu, Wei (Autor:in) / Hong, Wei (Autor:in) / Shi, Haotian (Autor:in) / Sun, Junqiang (Autor:in)

    Kongress:

    Semiconductor Lasers and Applications XII ; 2022 ; Online Only,China


    Erschienen in:

    Proc. SPIE ; 12311


    Erscheinungsdatum :

    2022-12-27





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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