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Updated: Feb 25, 2026
06:48
A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
556
Excitation-emission Fourier-transform spectroscopy based on a birefringent interferometer
Optics Express
|August 10, 2017
Summary
We developed a compact Fourier-transform spectrometer for multidimensional spectroscopy. This instrument efficiently maps molecular excitation and emission events using phase-locked pulses, enabling rapid data acquisition.
Area of Science:
- Spectroscopy
- Physical Chemistry
- Optical Physics
Background:
- Multidimensional spectroscopy correlates molecular excitation and emission events.
- Two-dimensional excitation-emission maps relate electronic ground and excited states.
- Existing methods can be complex and require active stabilization.
Purpose of the Study:
- To present a compact, fast, and versatile Fourier-transform spectrometer.
- To combine absorption and excitation-emission fluorescence spectroscopy in the visible spectrum.
- To achieve rapid data acquisition for molecular spectroscopy.
Main Methods:
- Utilizing a birefringent wedge-based common-path interferometer for phase-locked excitation pulse pairs.
- Employing Fourier-transform spectroscopy principles without active stabilization or auxiliary beams.
- Using both coherent and incoherent excitation sources on dye molecules in solution.
Main Results:
- Demonstrated a compact and stable Fourier-transform spectrometer.
- Achieved data acquisition times in seconds (coherent) and minutes (incoherent).
- Successfully generated phase-locked excitation pulse pairs for spectroscopy.
Conclusions:
- The developed spectrometer is a versatile tool for multidimensional spectroscopy.
- The common-path interferometer design offers inherent stability and simplicity.
- This approach enables efficient and rapid characterization of molecular excitation-emission dynamics.
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