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100-W single-frequency master-oscillator fiber power amplifier
1Institute of Applied Physics, Friedrich-Schiller-University in Jena, Max-Wien-Platz 1, D-07743 Jena, Germany. Andreas.Liem@uni-jena.de
Optics Letters
|September 6, 2003
Summary
Researchers achieved 100-W single-frequency laser output at 1064 nm using a master-oscillator fiber power-amplifier system. This high-power fiber laser demonstrates excellent beam quality and potential for further power scaling.
Area of Science:
- Laser Physics
- Fiber Optics
- Photonics
Background:
- High-power, single-frequency lasers are crucial for various scientific and industrial applications.
- Traditional laser systems often face limitations in power scaling and beam quality.
- Fiber laser technology offers a promising alternative for achieving high-power output with excellent beam characteristics.
Purpose of the Study:
- To demonstrate efficient generation of high-power, single-frequency radiation using a fiber laser system.
- To investigate the performance and power-scaling capabilities of a master-oscillator fiber power-amplifier (MOFPA) system.
- To analyze the factors limiting further power increase, such as stimulated Brillouin scattering.
Main Methods:
- Utilized a diode-pumped monolithic nonplanar ring laser as the master oscillator.
- Employed an ytterbium-doped large-mode-area fiber as the power amplifier.
- Characterized the laser output, including emission spectrum, beam quality, and intensity noise.
Main Results:
- Successfully generated 100-W single-frequency radiation at 1064 nm.
- Achieved diffraction-limited beam quality.
- Identified the threshold of stimulated Brillouin scattering as a key factor for power scaling.
Conclusions:
- The MOFPA system is an efficient approach for generating high-power, single-frequency laser output.
- The system exhibits potential for power scaling beyond 200 W.
- Understanding stimulated Brillouin scattering is essential for future high-power fiber laser development.