Dynamic and noise properties of multiple quantum well injection lasers

The fast pulse response and the dc noise spectra of multiple quantum well lasers grown by metalorganic chemical vapor deposition and with different stripe widths are reported. A best rise time of 100 ps corresponding to a modulation bandwidth of ∼3.6 GHz, was obtained. The dc noise spectra showed a damped shot noise resonance at a high frequency (∼3.0 GHz). The improvement in pulse and noise performances of these lasers compared to conventional double heterostructure lasers is explained with the small active volume and the high charge densities present in quantum well lasers.