TY  - JOUR
A1  - Kanal, Florian
A1  - Keiber, Sabine
A1  - Eck, Reiner
A1  - Brixner, Tobias
T1  - 100-kHz shot-to-shot broadband data acquisition for high-repetition-rate pump–probe spectroscopy
N2  - Shot-to-shot broadband detection is common in ultrafast pump–probe spectroscopy. Taking advantage of the intensity correlation of subsequent laser pulses improves the signal-to-noise ratio. Finite data readout times of CCD chips in the employed spectrometer and the maximum available speed of mechanical pump-beam choppers typically limit this approach to lasers with repetition rates of a few kHz. For high-repetition (≥ 100 kHz) systems, one typically averages over a larger number of laser shots leading to inferior signal-to-noise ratios or longer measurement times. Here we demonstrate broadband shot-to-shot detection in transient absorption spectroscopy with a 100-kHz femtosecond laser system. This is made possible using a home-built high-speed chopper with external laser synchronization and a fast CCD line camera. Shot-to-shot detection can reduce the data acquisition time by two orders of magnitude compared to few-kHz lasers while keeping the same signal-to-noise ratio.
KW  - cameras
KW  - CCD
KW  - charge-coupled device
KW  - modulators
KW  - time-resolved spectroscopy
KW  - ultrafast spectroscopy
KW  - ultrafast measurements
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-112853
ER  -