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Quantum-limited measurements of intensity noise levels in Yb-doped fiber amplifiers

We investigate the frequency-resolved intensity noise spectrum of an Yb-doped fiber amplifier down to the fundamental limit of quantum noise. We focus on the kHz and low MHz frequency regime with special interest in the region between 1 and 10 kHz. Intensity noise levels up to >60 dB above the shot noise limit are found, revealing great optimization potential. Additionally, two seed lasers with different noise characteristics were amplified, showing that the seed source has a significant impact and should be considered in the design of high power fiber amplifiers.

preprint2019arXivOpen access
Alexandra PoppVictor DistlerKevin JakschFlorian SedlmeirChristian R. MüllerNicoletta HaarlammertThomas SchreiberChristoph MarquardtAndreas TünnermannGerd Leuchs
physics.opticsquant-ph
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Open access10 authors2 topics
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Alexandra PoppVictor DistlerKevin JakschFlorian SedlmeirChristian R. MüllerNicoletta HaarlammertThomas SchreiberChristoph MarquardtAndreas TünnermannGerd Leuchs

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