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Updated: May 23, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Note: Optical trigger device with sub-picosecond timing jitter and stability.

Jan Kodet¹, Ivan Prochazka

¹Czech Technical University in Prague, Brehova 7, 115 19 Prague, Czech Republic.

The Review of Scientific Instruments

|April 3, 2012

Summary

This summary is machine-generated.

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We developed an optical trigger device for precise timing applications. This compact device achieves picosecond resolution and high stability, crucial for satellite laser ranging and photon counting experiments.

Area of Science:

Physics
Optical Engineering
Instrumentation

Background:

Picosecond timing resolution and detection delay stability are critical for advanced scientific experiments.
Existing technologies may not meet the stringent requirements for applications like satellite laser ranging and laser time transfer.

Purpose of the Study:

To design, construct, and evaluate a novel optical trigger device.
To achieve synchronous electrical signal generation for ultra-short optical pulses.
To ensure picosecond timing resolution and stable detection delay.

Main Methods:

The device integrates an ultrafast optical detector (avalanche photodiode, Si/Ge types for 350-1550 nm), an 8 GHz bandwidth comparator, a picosecond clock distribution circuit, and output driver circuits.
Construction as a single compact unit optimizes component matching and stability.

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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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Last Updated: May 23, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

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Performance was evaluated using various laser sources.

Main Results:

The optical trigger device demonstrates excellent timing performance with a random timing jitter component of typically 880 fs.
Temperature dependence of detection delay is measured at 370 fs/K.
Sub-picosecond systematic error contributions were achieved with different laser sources.

Conclusions:

The developed optical trigger device meets the demanding timing requirements for applications in satellite laser ranging, laser time transfer, and time-correlated photon counting.
The compact design and high performance ensure reliable and precise measurements.
The device offers a robust solution for experiments requiring picosecond resolution and stability.