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Updated: Jul 18, 2025
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
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Intense ultraviolet-visible-infrared full-spectrum laser
Lihong Hong1, Liqiang Liu1, Yuanyuan Liu1
1School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China.
Light, Science & Applications
|August 22, 2023
Summary
Researchers developed a high-brightness, ultrabroadband femtosecond laser source spanning ultraviolet to infrared wavelengths. This powerful new tool offers a wide spectrum for scientific research and industrial applications.
Area of Science:
- Optics and Photonics
- Laser Physics
- Nonlinear Optics
Background:
- Ultrabroadband laser sources are crucial for advancements in diverse scientific fields.
- Existing technologies often face limitations in brightness, bandwidth, or spectral coverage.
Purpose of the Study:
- To develop an intense ultraviolet-visible-infrared (UV-Vis-IR) full-spectrum femtosecond laser source.
- To achieve a broad spectral bandwidth with high energy per pulse.
Main Methods:
- Utilized a cascaded architecture involving gas-filled hollow-core fiber and lithium niobate crystals.
- Employed a mid-infrared pump pulse interacting with nonlinear optical processes.
- Leveraged second and third-order nonlinearities, including high harmonic generation and self-phase modulation.
Main Results:
- Generated a femtosecond laser source with a 300-5000 nm (25 dB) bandwidth.
- Achieved high energy output of 0.54 mJ per pulse.
- Demonstrated a synergistic effect of nonlinearities for full-spectrum generation.
Conclusions:
- The developed laser source provides a revolutionary tool for optical spectroscopy.
- Potential applications span physics, chemistry, biology, material science, industrial processing, and environmental monitoring.
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