Details
| Original language | English |
|---|---|
| Pages (from-to) | 9-12 |
| Number of pages | 4 |
| Journal | Optics letters |
| Volume | 41 |
| Issue number | 1 |
| Early online date | 16 Dec 2015 |
| Publication status | Published - 1 Jan 2016 |
Abstract
Single-frequency laser sources at a wavelength of 1 μm are typically scaled in power with Ytterbium-doped double-clad fiber amplifiers. The main limitations are stimulated Brillouin scattering, transversal mode instabilities and, from a technical point of view, the degree of fiber integration for a rugged setup. Addressing these limitations, we propose an alternative high-power single-frequency amplifier concept based on core pumping. A nonplanar ring oscillator with 2 W of output power at 1 kHz spectral linewidth was scaled by a fiber amplifier up to a power of 158 W without any indication of stimulated Brillouin scattering - using a standard Ytterbium-doped single-mode fiber with a mode field area of only ∼100 μm2. A short active fiber length and a strong temperature gradient along the gain fiber yield to efficient suppression of stimulated Brillouin scattering. For deeper understanding of the Brillouin scattering mitigation mechanism, we studied the Brillouin gain spectra with a Fabry-Perot interferometer at different output power levels of the fiber amplifier.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Optics letters, Vol. 41, No. 1, 01.01.2016, p. 9-12.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Core-pumped single-frequency fiber amplifier with an output power of 158 W
AU - Theeg, Thomas
AU - Ottenhues, Christoph
AU - Sayinc, Hakan
AU - Neumann, Jörg
AU - Kracht, Dietmar
N1 - Publisher Copyright: © 2015 Optical Society of America.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Single-frequency laser sources at a wavelength of 1 μm are typically scaled in power with Ytterbium-doped double-clad fiber amplifiers. The main limitations are stimulated Brillouin scattering, transversal mode instabilities and, from a technical point of view, the degree of fiber integration for a rugged setup. Addressing these limitations, we propose an alternative high-power single-frequency amplifier concept based on core pumping. A nonplanar ring oscillator with 2 W of output power at 1 kHz spectral linewidth was scaled by a fiber amplifier up to a power of 158 W without any indication of stimulated Brillouin scattering - using a standard Ytterbium-doped single-mode fiber with a mode field area of only ∼100 μm2. A short active fiber length and a strong temperature gradient along the gain fiber yield to efficient suppression of stimulated Brillouin scattering. For deeper understanding of the Brillouin scattering mitigation mechanism, we studied the Brillouin gain spectra with a Fabry-Perot interferometer at different output power levels of the fiber amplifier.
AB - Single-frequency laser sources at a wavelength of 1 μm are typically scaled in power with Ytterbium-doped double-clad fiber amplifiers. The main limitations are stimulated Brillouin scattering, transversal mode instabilities and, from a technical point of view, the degree of fiber integration for a rugged setup. Addressing these limitations, we propose an alternative high-power single-frequency amplifier concept based on core pumping. A nonplanar ring oscillator with 2 W of output power at 1 kHz spectral linewidth was scaled by a fiber amplifier up to a power of 158 W without any indication of stimulated Brillouin scattering - using a standard Ytterbium-doped single-mode fiber with a mode field area of only ∼100 μm2. A short active fiber length and a strong temperature gradient along the gain fiber yield to efficient suppression of stimulated Brillouin scattering. For deeper understanding of the Brillouin scattering mitigation mechanism, we studied the Brillouin gain spectra with a Fabry-Perot interferometer at different output power levels of the fiber amplifier.
UR - http://www.scopus.com/inward/record.url?scp=84994034548&partnerID=8YFLogxK
U2 - 10.1364/OL.41.000009
DO - 10.1364/OL.41.000009
M3 - Article
AN - SCOPUS:84994034548
VL - 41
SP - 9
EP - 12
JO - Optics letters
JF - Optics letters
SN - 0146-9592
IS - 1
ER -