Photonic synthesis based ultra-wide band signal generation

In order to meet the demand of broadband signal generating, this paper proposed a time-domain sythisis method with low sampling Digithal-to-Analog Converter. This method takes the anlog signal generated by low sampling DACs to the optical sampling pulses by Mach-Zender moduator with optical carriers of different vwavelength. And then, the multichannel optical pulse with modudlated data are delayed to forms into data sequences with setted interval. Last the optical pulses are combined into a sequence by WDM multiplexer and generated broadband microwave by a photodetectors. An experiment has conducted to verify the effectiveness of the method.