Polarization shaping in the mid-IR and polarization-based balanced heterodyne detection with application to 2D IR spectroscopy

TitlePolarization shaping in the mid-IR and polarization-based balanced heterodyne detection with application to 2D IR spectroscopy
Publication TypeJournal Article
Year of Publication2009
AuthorsMiddleton CT, Strasfeld DB, Zanni MT
Secondary TitleOptics Express
Volume17
Issue17
Pagination14526
Date Published2009
Abstract

We demonstrate amplitude, phase and polarization shaping of femtosecond mid-IR pulses using a germanium acousto-optical modulator by independently shaping the frequency-dependent amplitudes and phases of two orthogonally polarized pulses which are then collinearly overlapped using a wire-grid polarizer. We use a feedback loop to set and stabilize the relative phase of the orthogonal pulses. We have also used a wire-grid polarizer to implement polarization-based balanced heterodyne detection for improved signal-to-noise of 2D IR spectra collected in a pump-probe geometry. Applications include coherent control of molecular vibrations and improvements in multidimensional IR spectroscopy.

URLhttps://www.osapublishing.org/oe/abstract.cfm?uri=oe-17-17-14526
DOI10.1364/OE.17.014526
Short TitleOpt. Express