The spatial hole burning (SHB) in distributed feedback (DFB) lasers limits longitudinal-mode stability and occasionally results in spectral linewidth broadening or multiple-mode oscillation. Introduction of gain coupling is one of effective methods to reduce SHB. However, SHB may still exist in the gain-coupled (GC) DFB laser due to inappropriate coupling strength, parasitic index coupling, and facet reflection in practical devices. This paper describes self-suppression effect of SHB in absorptive-grating GC DFB lasers which is observed through the measurement of frequency modulation (FM) characteristics. This effect is attributed to the photon-density-dependent coupling coefficient in the gain-coupled cavity.<>


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    Title :

    Frequency modulation characteristics of absorptive-grating gain-coupled DFB lasers: spatial hole burning self-suppression effect


    Contributors:
    Sudoh, T.K. (author) / Nakano, Y. (author) / Tada, K. (author) / Kikuchi, K. (author) / Hirata, T. (author) / Hosomatsu, H. (author)

    Published in:

    Publication date :

    1993-01-01


    Size :

    161094 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English