A recently reported variant of asynchronous optical sampling compatible with arbitrary unstabilized laser repetition rates is applied to pump-probe spectroscopy. This makes possible the use of a 5.1 MHz chirped pulse oscillator as the pump laser, thus extending the available time window to almost 200 ns with a time resolution as good as about 320 fs. The method is illustrated with the measurement in a single experiment of the complete charge transfer dynamics of the reaction center from Rhodobacter sphaeroides.
© 2013 Optical Society of America
Original Manuscript: June 14, 2013
Manuscript Accepted: July 19, 2013
Published: August 23, 2013
Laura Antonucci, Adeline Bonvalet, Xavier Solinas, Michael R. Jones, Marten H. Vos, and Manuel Joffre, "Arbitrary-detuning asynchronous optical sampling pump-probe spectroscopy of bacterial reaction centers," Opt. Lett. 38, 3322-3324 (2013)