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Fabry-Pérot microcavity-integrated solid-state laser for wavelength-selective passive Q-switching.
Optics Express
|December 19, 2025
Summary
Researchers developed a novel wavelength-selective laser using Fabry-Pérot microcavity (FPM) crystals and GaAs-microwire saturable absorbers. This breakthrough enables equidistant six-wavelength passively Q-switched lasing, offering a new path for customized pulsed light sources.
Area of Science:
- Optics and Photonics
- Materials Science
- Laser Physics
Background:
- Solid-state laser wavelength control faces challenges like limited gain bandwidth and thermal issues.
- Existing methods often compromise between wavelength selection and system size.
Purpose of the Study:
- To demonstrate a new method for wavelength-selective, passively Q-switched lasers.
- To integrate Fabry-Pérot microcavity (FPM) crystals with saturable absorbers for enhanced laser performance.
Main Methods:
- Derivation of rate equations for passive Q-switching with FPM crystals.
- Synergistic integration of FPM crystals with GaAs-microwire (MW) network saturable absorbers.
- Experimental demonstration of equidistant six-wavelength lasing.
Main Results:
- Achieved equidistant six-wavelength passively Q-switched lasing using FPM crystals (Yb:SYB and Yb:CNGS).
- Emission wavelengths analyzed using Fabry-Pérot filter theory.
- Investigated thermal transport properties of the GaAs-MW network for thermal management.
Conclusions:
- The developed FPM crystal and GaAs-MW network approach offers a new paradigm for wavelength-selective lasers.
- This strategy provides design guidelines for thermal management in complex network architectures.
- The Q-switching laser design is extendable to various gain media, paving the way for all-solid-state, wavelength-customized pulsed light sources.
