Recently it was shown that carrier transport can have a significant effect on the modulation response and relative intensity noise of quantum well lasers. We showed that carrier transport across wide undoped separate confinement heterostructure (SCH) regions leads to a severe low frequency rolloff in the modulation response, in addition to a reduction in the effective differential gain. Analytic expressions for the modulation response, resonance frequency and damping were also derived which showed that the differential gain, go, is reduced to go//spl chi/. The transport factor, /spl chi/, is given by (1+/spl tau//sub r///spl tau//sub e/ where /spl tau//sub r/, is the carrier transport time across the SCH and /spl tau//sub e/, is the themioaic emission time out of the quantum well. The rolloff frequency is given by /spl tilde/ 1/2/spl pi/spl tau//sub r/.


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    Title :

    Carrier confinement and its effect on the internal quantum efficiency and modulation response of quantum well lasers


    Contributors:
    Nagarajan, R. (author) / Mirin, R.P. (author) / Reynolds, T.E. (author) / Bowers, J.E. (author)


    Publication date :

    1992-01-01


    Size :

    167656 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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