We present the realization of single-lobe surface-emitting devices, which instead of using a chirped grating employ a simpler technique: strongly asymmetric coating of cleaved mirror facets. It is found that for high duty-cycle (70%) grating devices single-lobe emission occurs over a wide range of grating phase values at the high reflectivity facet: 10/spl deg/-80/spl deg/. Furthermore, it is found that placing phase shifts around n/2 in the center of the grating provides orthonormal, single-lobe operation with nearly uniform near-field intensity profiles.


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    Title :

    Single-mode, single-lobe operation of surface-emitting 2nd-order DFB lasers


    Contributors:
    Lopez, J. (author) / Witjaksono, G. (author) / Botez, D. (author)


    Publication date :

    1999-01-01


    Size :

    157700 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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