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Related Experiment Video

Updated: Jun 21, 2026

A Multimodal Wide-Field Fourier-Transform Raman Microscope

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Wide-time-range spectral-shearing interferometry.

Hitoshi Tomita¹, Hajime Nishioka

¹Institute for Laser Science, the University of Electro-Communications Chofu, Tokyo 182-8585 Japan. tomita@ils.uec.ac.jp

|August 6, 2009

Summary

This summary is machine-generated.

Spectral-shearing interferometry using two-color fields characterizes chirped pulses over extended time ranges. This technique accurately measures pulse distortions, paving the way for advanced optical measurements.

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Area of Science:

Optics and Photonics
Ultrafast Science

Background:

Characterizing ultrashort laser pulses is crucial for understanding nonlinear optical phenomena.
Existing methods for measuring pulse duration and phase distortion have limitations in time-range coverage.

Purpose of the Study:

To demonstrate a long-time-range spectral-shearing interferometry technique.
To characterize strongly chirped optical pulses with quadratic and cubic phase distortions.

Main Methods:

Utilizing frequency mixing of two-color monochromatic fields.
Employing a coaxial two-color field generated by a narrow-gap passive etalon.

Main Results:

Successfully demonstrated long-time-range spectral-shearing interferometry.
Characterized strongly chirped pulses, including a linearly chirped pulse of 2.2 ps (6 ps full duration).

Conclusions:

The developed spectral-shearing interferometry extends measurement capabilities for chirped pulses.
Future improvements with highly coherent two-color sources (frequency-stabilized lasers, frequency comb modes) promise further time-range extensions.