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Characterization Of Analog Modulation Of Algaas Lasers And The Induced Intensity Noise, Moustafa Ahmed, Nour Zaki El-Sayed, Hameeda Ibrahim, Kamal Abdelhady

Turkish Journal of Physics

The dynamics of AlGaAs laser diodes under analog intensity modulation are characterized and the associated intensity noise is evaluated. The study is based on numerical solution of the stochastic rate equations of semiconductor lasers. Based on the shape of the modulated laser signal, the modulation dynamics are classified into eight distinct types. Four types are characterized by continuous periodic signals, and three types have periodic pulsing signals. These signals happen to have period doubling or superposed by sub-peaks from the relaxation oscillations of the laser. The last type is chaos, in which the signal is irregular and non-uniform. The noise …