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Related Experiment Video

Updated: Jul 9, 2026

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
08:06

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

Published on: June 2, 2017

Fiber-coupled microsphere laser.

M Cai, O Painter, K J Vahala

    Optics Letters
    |December 11, 2007
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel 1.5-microm wavelength fiber laser using glass microsphere resonators. This compact laser system achieves low threshold power and high output power, enabling single-mode operation.

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    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Laser Physics

    Background:

    • Microsphere resonators offer unique optical properties for laser development.
    • Integrating resonators with fiber tapers presents challenges in power delivery and emission extraction.
    • Erbium:ytterbium doped phosphate glass provides high gain at 1.5 micrometers.

    Purpose of the Study:

    • To demonstrate a novel fiber laser design utilizing microsphere resonators.
    • To optimize pump power delivery and laser emission extraction using a fiber taper.
    • To achieve efficient laser operation at 1.5 micrometers with a compact system.

    Main Methods:

    • Fabrication of a fiber taper integrated with glass microsphere resonators.
    • Utilizing highly doped erbium:ytterbium phosphate glass for microsphere fabrication.

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  • Characterization of laser performance, including threshold pump power and output power.

    • Main Results:

    • Demonstrated a 1.5-microm wavelength fiber laser with microsphere resonators.
    • Achieved low laser threshold pump powers of 60 microwatts.
    • Obtained high fiber-coupled output powers up to 3 microwatts with single-mode operation.
    • Successfully demonstrated a bisphere laser system.

    Conclusions:

    • The proposed fiber taper-microsphere resonator system is an effective design for compact 1.5-microm fiber lasers.
    • The system exhibits efficient laser operation with low threshold and high output power.
    • This technology holds potential for various applications requiring compact and efficient laser sources.