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Setup for dynamic characterization.
Optical power from fiber vs bias current at 20, 30, 50, and 90 °C (solid line), and current vs voltage for 20 °C (dashed), Inset: Optical spectrum at 4 mA. Note that the width of the spectral peak is determined by the limited resolution of the spectrum analyzer.
Small-signal modulation response ( electrical power) measured (solid line) and fitted (dashed line) for a device of a large detuned-cavity VCSEL, for 2, 2.5, 3, 4, and 5 mA bias current at room temperature.
Temperature dependence of the different types of bandwidth-limiting effects and the resulting overall bandwidth.
Extracted parameters from dynamic measurements.
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