Nonlinearities of GaAlAs lasers--Harmonic distortion

Kristian Stubkjær, Magnus Danielsen

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    Narrow stripe lasers (2-6 mum) and transverse junction lasers exhibit excellent linearity. The dependence of relative second-and third-harmonic distortion is investigated as a function of modulation frequency and modulation current. Relative second- and third-harmonic distortion of -50 and -70 dB is observed for an optical signal of 4 mW p-p (f_{m} = 60MHz). Intermodulation products are compared with the harmonic distortion and good agreement is obtained between the two quantities when the relations for a simple nonlinearity without memory are used. The measured distortion is in agreement with distortion calculated from rate equations.
    Original languageEnglish
    JournalI E E E Journal of Quantum Electronics
    Issue number5
    Pages (from-to)531-537
    Publication statusPublished - 1980

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