Femtosecond pulse shaping directly in the mid-IR using acousto-optic modulation

TitleFemtosecond pulse shaping directly in the mid-IR using acousto-optic modulation
Publication TypeJournal Article
Year of Publication2006
AuthorsShim S-H, Strasfeld DB, Fulmer EC, Zanni MT
Secondary TitleOptics Letters
Volume31
Issue6
Pagination838
Date Published2006
Abstract

Pulse shaping directly in the mid-IR is accomplished by using a germanium acousto-optic modulator (Ge AOM) capable of programmable phase and amplitude modulation for IR light between 2 and 18 μm. Shaped waveforms centered at 4.9 μm are demonstrated in both the frequency and the time domains. With a 50% throughput efficiency, the Ge AOM can generate much more intense pulses with higher resolution than can indirect shaping methods. Furthermore, the phase stability of the shaped pulse proved sufficient for cross correlation with unshaped mid-IR pulses. Thus, phase- and amplitude-tailored pulses can now be readily incorporated into phase-sensitive experiments, such as heterodyned 2D IR spectroscopy.

DOI10.1364/OL.31.000838
Short TitleOpt. Lett.