Measurement of high time-bandwidth pulses on a chip with SPIDER

We develop a method capable of characterizing both the amplitude and phase of ultrafast optical pulses with the aid of a synchronized incoherently-related clock pulse based on a novel variation of SPIDER. It exploits degenerate four-wave-mixing and its design is amenable for full on chip signal characterization. By implementing our method in a CMOS compatible waveguide, we measure pulses with < 100mW peak power, a frequency bandwidth > 1THz, and up to 100ps pulsewidths. Our novel reconstruction algorithm that we call Fresnel-Limited Extraction Procedure (FLEA), yields a time-bandwidth product (TBP)>100.