Bent waveguides are superimposed on homogeneous distributed feedback (DFB) grating fields to generate chirped DFB gratings. This efficient and high-resolution method enables the fabrication of arbitrarily axially chirped DFB gratings by appropriately bent waveguides which reveal differences between neighboring effective DFB pitches in the sub-interatomic range. The bending functions are generated by high-resolution lithography on a set of masks which can be frequently reused for a low-cost production process. The design principles are described defining specific unit cells which are reproduced as often as necessary to obtain a full coverage of the wafer. The method is demonstrated for semiconductor lasers including DFB gratings.


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    Title :

    Chirped DFB gratings using bent waveguides to tailor specific laser properties


    Contributors:

    Conference:

    Fifth International Conference on Industrial Lasers and Laser Applications '95 ; 1995 ; Shatura,Moscow,Russia


    Published in:

    Publication date :

    1996-03-01





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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