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Related Concept Videos

The Electromagnetic Spectrum01:24

The Electromagnetic Spectrum

Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...

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Related Experiment Video

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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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Published on: December 30, 2025

Swept wavelength source in the 1 microm range.

Frederik Nielsen, Lars Thrane, John Black

    Optics Express
    |June 5, 2009
    PubMed
    Summary

    This study introduces a novel frequency shifting ring source utilizing a Ytterbium doped fiber amplifier (YDFA) for scanning over 1.1 nm. A new timing method prevents Q-switching, enabling 1-1.1 micrometer wavelength operation.

    Area of Science:

    • Optical Engineering
    • Laser Physics
    • Spectroscopy

    Background:

    • Frequency shifting ring lasers are crucial for tunable light sources.
    • Ytterbium doped fiber amplifiers (YDFAs) offer efficient amplification in the near-infrared spectrum.
    • Q-switching can degrade the performance of pulsed laser systems.

    Purpose of the Study:

    • To demonstrate a novel frequency shifting ring source using a YDFA.
    • To achieve tunable operation in the 1-1.1 micrometer wavelength range.
    • To suppress unwanted Q-switching behavior in the YDFA-based source.

    Main Methods:

    • Utilized a Ytterbium doped fiber amplifier (YDFA) in a frequency shifting ring laser configuration.
    • Implemented a novel timing scheme to mitigate Q-switching instabilities.

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  • Employed a concatenated numerical amplifier model for performance prediction.

    • Main Results:

    • Successfully demonstrated scanning over a 1.1 nm range.
    • Achieved stable operation in the 1-1.1 micrometer wavelength region.
    • Validated the effectiveness of the novel timing scheme in suppressing Q-switching.
    • The numerical model accurately predicted the source’s behavior.

    Conclusions:

    • The YDFA is suitable for frequency shifting ring laser applications.
    • The developed timing scheme enhances the stability and performance of the source.
    • Numerical modeling provides a reliable tool for designing and optimizing such laser systems.