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High-power widely tunable thulium fiber lasers
Timothy S McComb1, R Andrew Sims, Christina C C Willis
1Townes Laser Institute, CREOL, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816, USA.
Applied Optics
|November 12, 2010
Summary
High-power thulium fiber lasers are crucial for long-range atmospheric applications. Two configurations achieved over 150 W average power with narrow linewidths and broad tunability around 2 μm.
Area of Science:
- Laser Physics
- Optical Engineering
- Atmospheric Science
Background:
- Long-range atmospheric propagation demands high-power lasers.
- Thulium fiber lasers offer unique properties for such applications.
- Development of tunable, high-power thulium fiber lasers is essential.
Purpose of the Study:
- To evaluate two distinct laser configurations for high-power tunable thulium fiber lasers.
- To compare their performance metrics for atmospheric propagation applications.
- To demonstrate advanced wavelength stabilization and tunability.
Main Methods:
- Configuration 1: Single oscillator with volume Bragg grating for wavelength stabilization.
- Configuration 2: Master oscillator power amplifier (MOPA) system with diffraction grating for tuning and stabilization.
- Performance characterization including power, efficiency, linewidth, and tunability.
Main Results:
- Both configurations delivered >150 W of average power.
- Slope efficiencies exceeded 50% for both systems.
- Narrow output linewidths and >100 nm tunability were achieved around 2 μm.
Conclusions:
- Both single oscillator and MOPA configurations are viable for high-power, tunable thulium fiber lasers.
- These lasers meet critical requirements for long-range atmospheric propagation.
- The demonstrated performance highlights advancements in laser technology for specialized applications.
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