| 摘要 |
A device 1 for generating an electrical signal with a wideband arbitrary waveform uses a plurality of continuous wave lasers 2, each producing light at a different wavelength. A plurality of optical modulators 4 receives an optical signal from one of the lasers 2 and modulates the optical signal in response to an electromagnetic signal. An optical combiner 6, ideally an arrayed waveguide grating, combines the optical signals received at its input ports into one output signal. Each input port of the optical combiner 6 is arranged to receive the output of an associated optical modulator 4 by an optical signal path 9, whereby each optical signal path 9 comprises an optical chopper 10, such as a pulse generator, for chopping the optical signal received from the modulator 4 into optical pulses. A photodetector 11 then receives the output of the optical combiner 11 and produces an electrical signal in response. |
