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Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

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Experimentally simple, extremely broadband transient-grating frequency-resolved-opticalgating arrangement.

Dongjoo Lee, Selcuk Akturk, Pablo Gabolde

|June 18, 2009

Summary

We developed a simple, alignment-free optical setup for measuring ultrashort laser pulses. This technique is broadband and ideal for characterizing pulses from optical parametric amplifiers.

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Area of Science:

Optics and Photonics
Ultrafast Laser Science

Background:

Characterizing ultrashort laser pulses is crucial for many scientific applications.
Existing methods often require complex alignment and moving parts.

Purpose of the Study:

To demonstrate a simplified, alignment-free method for ultrashort pulse characterization.
To present a broadband technique suitable for optical parametric amplifier outputs.

Main Methods:

Utilized a Transient-Grating Frequency-Resolved-Optical-Gating (TG-FROG) arrangement.
Employed a simple input mask to split the laser beam into three.
Used a Fresnel biprism for beam crossing and introducing delay.

Main Results:

Achieved an essentially alignment-free TG-FROG setup.

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Patterning via Optical Saturable Transitions - Fabrication and Characterization

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Published on: December 11, 2014

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Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

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Published on: May 18, 2011

Patterning via Optical Saturable Transitions - Fabrication and Characterization

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Published on: December 11, 2014

Demonstrated single-shot operation with no moving parts.

Confirmed the broadband nature of the technique.

Conclusions:

The developed method offers a significant simplification for ultrashort pulse measurement.
Its broadband capability makes it highly suitable for characterizing optical parametric amplifier pulses.