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A cladding-pumped, tunable holmium doped fiber laser.
Optics Express
|February 12, 2014
Summary
We developed a high-power, tunable holmium doped fiber laser. This laser achieved over 18 W at 2.171 µm, a record for holmium lasers operating above 2.15 µm.
Area of Science:
- Laser Physics
- Optical Engineering
- Materials Science
Background:
- Holmium-doped fiber lasers are crucial for various applications requiring specific wavelengths.
- Achieving high power output, especially at longer wavelengths (>2.15 µm), presents significant challenges due to factors like background losses.
Purpose of the Study:
- To present a tunable, high-power cladding-pumped holmium doped fiber laser.
- To investigate the performance of holmium doped fibers at extended wavelengths.
- To identify key factors for efficient laser operation.
Main Methods:
- Utilized a cladding-pumped fiber laser architecture.
- Employed holmium doping in the fiber core.
- Tuned the laser output across a broad wavelength range.
- Characterized the laser's power output and spectral performance.
Main Results:
- Generated >15 W CW average power across 2.043 - 2.171 μm.
- Achieved a maximum output power of 29.7 W at 2.120 μm.
- Demonstrated 18.2 W operation at 2.171 µm, the highest reported power for a holmium laser >2.15 µm.
Conclusions:
- The developed holmium doped fiber laser demonstrates unprecedented power at longer wavelengths.
- Fiber design and management of background losses are critical for efficient high-power operation.
- This work advances the capabilities of holmium lasers for specialized applications.
