Measurement of 3db Bandwidth of Laser Diode Chips

An accurate technique for measuring the frequency response of semiconductor laser diode chips is proposed and experimentally demonstrated. The effects of test jig parasites can be completely removed in the measurement by a new calibration method. In theory, the measuring range of the measurement system is only determined by the measuring range of the instruments network analyzer and photo detector. Diodes' bandwidth of 7.5GHz and 10GHz is measured. The results reveal that the method is feasible and comparing with other method, it is more precise andeasier to use.