Abstract
Ultrafast optical beam rotation is proposed for single-shot, time-resolved measurements. A pump–probe configuration is considered using a diffraction grating and focusing optics to create angular encoding of the time delay between the pump and probe pulses. The characteristic time of the grating-lens system is derived as a function of dispersion, NA, and time window . An analytical equation for time resolution is obtained that incorporates , laser pulse width, and beam crossing, enabling optimum selection of optical components. For commercial standard gratings with width , laser , and , a 160 ps time window can be achieved, and for .
© 2014 Optical Society of America
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