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Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
Published on: February 9, 2012
Supercontinuum source tuned by an on-axis monochromator for fluorescence lifetime imaging
Raffaella Mercatelli1, Silvia Soria, Giuseppe Molesini
1ISC-CNR, Istituto dei Sistemi Complessi, Sesto Fiorentino (FI), Italy.
Optics Express
|October 14, 2010
Summary
We developed a tunable white light source using supercontinuum generation for advanced microscopy techniques. This innovation enables precise wavelength selection for fluorescence lifetime imaging and FRET studies.
Area of Science:
- Optics and Photonics
- Biophysics
- Microscopy
Background:
- Supercontinuum generation in microstructured optical fibers offers a broadband light source.
- Fluorescence Lifetime Imaging (FLIM) and Förster Resonance Energy Transfer (FRET) are powerful biophysical techniques.
- Confocal microscopy requires efficient light delivery and wavelength tunability.
Purpose of the Study:
- To apply an optically tunable coherent white light source to FLIM and FRET.
- To demonstrate the use of a novel lens for wavelength tuning and fiber delivery.
- To enable advanced fluorescence imaging with a versatile light source.
Main Methods:
- Supercontinuum generation in microstructured optical fibers.
- Development of a prototype lens with monotonic longitudinal chromatic aberration for wavelength tuning.
- Integration with confocal microscopy for FLIM and FRET measurements.
Main Results:
- Demonstration of an optically tunable supercontinuum white light source (400-1000 nm).
- Successful application of the source to FLIM and FRET microscopy.
- The prototype lens effectively functions as an axial monochromator for fiber-coupled confocal microscopy.
Conclusions:
- The tunable supercontinuum source is suitable for advanced fluorescence microscopy.
- The developed optical system provides efficient wavelength selection for FLIM and FRET.
- This technology enhances the capabilities of confocal microscopy for biological research.
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