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Picosecond spectroscopy of optically modulated high-speed laser diodes.

Pikosekundenspektroskopie von optisch modulierten Hochgeschwindigkeitslaserdioden


Applied Physics Letters 67 (1995), No.13, pp.1809-1811
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IAF ()
InGaAs/GaAs; laser diodes; Laserdiode; relaxation oscillations; Relaxationsoszillationen

The emission transients of optically excited high-speed multiple quantum well laser diodes have been measured by up-converting the emission in a nonlinear crystal. From the gain-switched oscillation the intrinsic resonance frequency and damping factor are determined. The high temporal resolution allows us to observe additional short period oscillations with a frequency of about 170 GHz. Numerical solution of the traveling wave rate equations indicates that these high frequency oscillations arise due to inhomogeneous carrier injection.