Oscilloscopic Capture of 100 GHz Modulated Optical Waveforms at Femtowatt Power Levels

Time-domain sampling oscilloscopic capture of ultra-high bandwidth modulated optical waveforms at 1550 nm is demonstrated at ultra-low power levels below −100dBm, with eye SNR varying from 13dB at 30 GHz to 6dB at 100 GHz.