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Updated: Feb 7, 2026
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
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Summary
Researchers developed a novel Er-doped Gd3Ga2.7Al2.3O12 (Er:GGAG) laser emitting at 2.8 μm. This laser achieved 4.9 mJ pulse energy and demonstrated spectral tunability for various applications.
Area of Science:
- Laser physics
- Materials science
- Optics
Background:
- Erbium-doped materials are crucial for developing lasers in the mid-infrared spectrum.
- Gallium-based garnets offer promising host matrices for rare-earth ions.
- Efficient laser sources at 2.8 μm are needed for various scientific and industrial applications.
Purpose of the Study:
- To present the first demonstration of a pulse and continuous-wave (CW) laser utilizing an Er-doped Gd3Ga2.7Al2.3O12 (Er:GGAG) active medium.
- To characterize the laser performance, including output energy and slope efficiency.
- To investigate the spectral tunability of the Er:GGAG laser.
Main Methods:
- Longitudinal diode pumping of the Er:GGAG crystal.
- Characterization of laser output in both pulsed and CW regimes.
- Utilizing a birefringent MgF2 plate to achieve wavelength tunability.
Main Results:
- Maximal output energy of 4.9 mJ achieved in the pulsed regime.
- Slope efficiency of 13.5% demonstrated for the pulsed laser.
- Spectral tunability obtained across multiple bands: 2800-2822 nm, 2829-2891 nm, and 2917-2942 nm.
Conclusions:
- The Er:GGAG crystal is a viable active medium for generating laser radiation at 2.8 μm.
- The developed laser system exhibits significant output energy and efficiency.
- The demonstrated tunability broadens the potential applications of this novel laser source.
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