Linear spatio-temporal characterization of a UV microscope objective for nonlinear imaging and spectroscopy by using...

Area of Science:

• Optical microscopy
• Ultrafast laser science
• Aberration analysis

Background:

• Microscope objective aberrations limit imaging resolution and fidelity.
• Characterizing spatio-temporal aberrations is crucial for ultrafast microscopy applications.
• UV objectives require specialized aberration analysis due to material properties.

Purpose of the Study:

• To characterize spatio-temporal aberrations of a UV microscope objective.
• To enable accurate reconstruction of ultrafast laser pulse profiles at the focus.
• To validate a novel characterization technique for high-NA objectives.

Main Methods:

• Utilized two-dimensional Fourier transform spectral interferometry.
• Employed a 420 nm, 38 fs ultrafast laser pulse.
• Incorporated a wave propagation code with measured aberration data.

Main Results:

• Successfully characterized the spatio-temporal aberrations of a 0.32 NA UV objective.
• Deduced the spatial and temporal pulse profiles at the objective's focus.
• Demonstrated the capability to retrieve detailed pulse information in the UV spectrum.

Conclusions:

• Two-dimensional Fourier transform spectral interferometry is effective for UV objective aberration characterization.
• Accurate pulse profile reconstruction is achievable by incorporating measured aberrations.
• This method advances the performance analysis of high-NA UV microscope objectives.