Abstract

In picosecond transient absorption spectroscopy using superbroadened continuum passed through an echelon to produce an optical interrogating probe beam, an accurate knowledge of the relative timing between the excitation and probe pulses is required. For instance, when changes in the transient absorption spectrum are studied as a function of time, particularly when the rate of transient formation is comparable to the excitation pulse duration, both the time spread of the continuum pulse and the time origin of the probe pulse must be accurately known. The time spread or "chirp" of the polychromatic continuum pulse is only occasionally estimated even though the variation due to group delay dispersion may be quite large especially for long pathlength continuum cells which are frequently used.

Ultrafast continuum mid-infrared spectroscopy: probing the entire vibrational spectrum in a single laser shot with femtosecond time resolution

Carmella Calabrese, Ashley M. Stingel, Lei Shen, and Poul B. Petersen
Opt. Lett. 37(12) 2265-2267 (2012)

Double-stage picosecond Kerr gate for ballistic time-gated optical imaging in turbid media

L. M. Wang, P. P. Ho, and R. R. Alfano
Appl. Opt. 32(4) 535-540 (1993)

Pump-probe phase spectroscopy with submilliradian sensitivity and nanosecond time delay using Michelson interferometers

C. D. Cruz, J. C. Stephenson, S. Engmann, E. G. Bittle, and J. K. Wahlstrand
Opt. Express 31(9) 14299-14307 (2023)

Two-dimensional electronic spectroscopy with a continuum probe

Patrick F. Tekavec, Jeffrey A. Myers, Kristin L. M. Lewis, and Jennifer P. Ogilvie
Opt. Lett. 34(9) 1390-1392 (2009)

Suppression of Raman-resonant interferences in rotational coherent anti-Stokes Raman spectroscopy using time-delayed picosecond probe pulses

Thomas Seeger, Johannes Kiefer, Yi Gao, Brian D. Patterson, Christopher J. Kliewer, and Thomas B. Settersten
Opt. Lett. 35(12) 2040-2042 (2010)