High multimode CW powers have been achieved from vertical-cavity surface-emitting laser diodes (VCSEL's). However, due to the problems of thermal lensing and spatial hole burning, single mode powers have been limited to several mW. We show experimentally and with a simple model that, in weakly index guided VCSEL's, self focusing causes the fundamental mode width to decrease with increasing power in the mode, resulting in a rapid transition to multimode operation and limiting the maximum single fundamental mode power.<>


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    Title :

    Self focusing in vertical-cavity surface-emitting laser diodes


    Contributors:
    Wilson, G.C. (author) / Kuchta, D.M. (author) / Walker, J.D. (author) / Smith, J.S. (author)

    Published in:

    Publication date :

    1993-01-01


    Size :

    173165 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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