Details
| Original language | English |
|---|---|
| Pages (from-to) | 4242-4244 |
| Number of pages | 3 |
| Journal | Optics letters |
| Volume | 37 |
| Issue number | 20 |
| Early online date | 9 Oct 2012 |
| Publication status | Published - 15 Oct 2012 |
Abstract
A current limit in power scaling of Yb-doped fiber amplifiers is the sudden onset of mode instabilities. We investigated this effect on a single-frequency Yb-doped photonic crystal fiber amplifier with a low mode instability threshold power. By measuring the overlap of the fiber output beam with the fundamental mode of an external cavity to be about 95%, we could exclude significant modal power transfer below a sharp power threshold. Furthermore, we directly measured the frequency resolved intensity noise spectra. No fluctuations in the overall output power were observed, but for the modal content different oscillation regimes were identified.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Optics letters, Vol. 37, No. 20, 15.10.2012, p. 4242-4244.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Beam quality degradation of a single-frequency Yb-doped photonic crystal fiber amplifier with low mode instability threshold power
AU - Karow, Malte
AU - Tünnermann, Henrik
AU - Neumann, Jörg
AU - Kracht, Dietmar
AU - Weßels, Peter
PY - 2012/10/15
Y1 - 2012/10/15
N2 - A current limit in power scaling of Yb-doped fiber amplifiers is the sudden onset of mode instabilities. We investigated this effect on a single-frequency Yb-doped photonic crystal fiber amplifier with a low mode instability threshold power. By measuring the overlap of the fiber output beam with the fundamental mode of an external cavity to be about 95%, we could exclude significant modal power transfer below a sharp power threshold. Furthermore, we directly measured the frequency resolved intensity noise spectra. No fluctuations in the overall output power were observed, but for the modal content different oscillation regimes were identified.
AB - A current limit in power scaling of Yb-doped fiber amplifiers is the sudden onset of mode instabilities. We investigated this effect on a single-frequency Yb-doped photonic crystal fiber amplifier with a low mode instability threshold power. By measuring the overlap of the fiber output beam with the fundamental mode of an external cavity to be about 95%, we could exclude significant modal power transfer below a sharp power threshold. Furthermore, we directly measured the frequency resolved intensity noise spectra. No fluctuations in the overall output power were observed, but for the modal content different oscillation regimes were identified.
UR - http://www.scopus.com/inward/record.url?scp=84867469354&partnerID=8YFLogxK
U2 - 10.1364/OL.37.004242
DO - 10.1364/OL.37.004242
M3 - Article
AN - SCOPUS:84867469354
VL - 37
SP - 4242
EP - 4244
JO - Optics letters
JF - Optics letters
SN - 0146-9592
IS - 20
ER -