Open AccessMid-IR beam direction stabilization scheme for vibrational spectroscopy, including dual-frequency 2DIR
Author(s) -
Clara Nyby,
Joel D. Leger,
Jiacheng Tang,
Clyde Varner,
Victor V. Kireev,
Igor V. Rubtsov
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.006801
Subject(s) - schematic , optics , detector , infrared , beam (structure) , physics , spectroscopy , laser , laser beam quality , materials science , laser beams , quantum mechanics , electronic engineering , engineering
A compact laser beam direction stabilization scheme is developed that provides the angular stability of better than 50 μrad over a wide range of frequencies from 800 to 4000 cm-1. The schematic is fully automated and features a single MCT quadrant detector. The schematic was tested to stabilize directions of the two IR beams used for dual-frequency two-dimensional infrared (2DIR) measurements and showed excellent results: automatic tuning of the beam direction allowed achieving the alignment quality within 10% of the optimal alignment obtained manually. The schematic can be easily implemented to any nonlinear spectroscopic measurements in the mid-IR spectral region.