High-speed electrical sampling using optical second-harmonic generation

Nahata, Ajay; Heinz, Tony F.; Misewich, James A.
August 1996
Applied Physics Letters;8/5/1996, Vol. 69 Issue 6, p746
Academic Journal
We report the application of optical second-harmonic generation to the measurement of ultrafast electrical pulses. The technique relies on the sensitivity of the second-harmonic response to electric fields in centrosymmetric materials. Electrical pulses propagating on a silicon-based coplanar transmission line have been characterized with subpicosecond time resolution and 100 mV/&sqrt;Hz sensitivity. We have measured the bias dependence of the second harmonic intensity over a 20 V range and have used this data to calibrate the transient response. The observed full-width at half maximum response time of the SHG waveform is ∼1 ps, which is consistent with the value obtained from an electronic cross-correlation measurement. © 1996 American Institute of Physics.


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