We perform measurements of far field pattern of various quantum-confined heterostructures namely quantum well (QW), quantum dash (Qdash), and quantum dot (Qdot) lasers to study the effect of different active gain mediums of semiconductor lasers on the optical beam quality and coupling efficiency. The beam pattern profile of the Qdash laser is similar to that of the QW laser (FWHM ~ 20°) while Qdot laser shows smaller divergence (FWHM ~ 5°) and retain its intensity profile of single lobe Gaussian-shape at current injection up to two and half times threshold current.


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    Title :

    Far-field patterns of Quantum Well, Quantum Dash, and Quantum Dot Laser Diodes


    Contributors:
    Ding, Y. H. (author) / Tan, C. L. (author) / Hongpinyo, V. (author) / Dimas, C. E. (author) / Wang, Y. (author) / Chen, C. (author) / Djie, H. S. (author) / Ooi, B. S. (author)


    Publication date :

    2008-12-01


    Size :

    433253 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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