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Related Experiment Video

Updated: Apr 15, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

7.8K

Fiber-coupled high-speed asynchronous optical sampling with sub-50 fs time resolution.

N Krauss, A Nast, D C Heinecke

    Optics Express
    |April 4, 2015
    PubMed
    Summary
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    We developed a high-speed pump-probe system achieving 42 fs pulse duration for precise material analysis. This advanced optical sampling technology enables sub-nanometer thickness mapping and terahertz field generation.

    Area of Science:

    • Ultrafast spectroscopy
    • Optical physics
    • Materials science

    Background:

    • Precise temporal resolution is crucial for studying ultrafast phenomena in materials.
    • Existing pump-probe systems often face limitations in time resolution or temporal window.
    • High-speed optical sampling techniques offer potential for enhanced measurement capabilities.

    Purpose of the Study:

    • To develop and characterize a fiber-coupled pump-probe system with sub-50 fs time resolution.
    • To demonstrate the system's capability for high-resolution material characterization.
    • To showcase applications in terahertz field generation.

    Main Methods:

    • Utilizing high-speed asynchronous optical sampling.
    • Employing a transmission grism pulse compressor for short pulse generation.

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  • Integrating a 1 GHz pulse repetition rate laser source and 6 m of optical fiber.

    • Main Results:

    • Achieved pump pulses with a 42 fs duration, 300 mW average power, and >5 kW peak power.
    • Demonstrated sub-nanometer thickness resolution for soft X-ray mirrors over a cm(2) area.
    • Showcased terahertz field generation with resolved spectral components up to 3.5 THz.

    Conclusions:

    • The developed fiber-coupled system offers exceptional time resolution and a nanosecond time window.
    • The system is effective for high-resolution thickness mapping of optical components.
    • It provides a versatile platform for ultrafast spectroscopy and terahertz science.