Positive exponential designated parameter pulsed light signal generating apparatus and method

Designated parameter generating apparatus and method for positive exponential pulse optical signal, comprising a positive exponential signal generation module, an electro-optical conversion module, the output optical signal monitoring module and a power module, an electrical signal is generated by resistance index n transmission cable network method, and a current pulse and a positive pre-bias current signal summed exponential manner, the driving of the linear PI is less than 1%, light emitting diode 100 times greater than the linear range, to achieve a linear conversion between electrical and optical signals, the ultimate solution to produce positive exponential pulse light signals difficult problem, and the system according to the driving principle, a feasible method gives a characteristic optical signal monitoring output line. The present invention can produce a positive exponential characteristic parameter α is greater than 20μs-1, index feature remains positive exponential pulse optical signal range greater than 100 times, and the ability to output an optical signal line characteristic monitoring may optoelectronic measuring system signal measurement purposes Index laboratory calibration, commissioning, calibration and evaluation of research work provides an analog optical signal source.