A Mixer Based Electro-Optic Sampling System for Submillivolt Signal Detection.
01 January 1990
We report on a new technique which allows electro-optic sampling to be performed in a frequency range which is above the 1/f noise regime of the pump-probe laser, while at the same time utilizing the high sensitivity, low noise properties of an audio-frequency lock-in amplifier. This new approach to electro- optic signal extraction has resulted in an unprecedented signal- to-noise capability. The new technique is compared to previous, conventional approaches.