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arXiv · 1908.00756

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

Alexandra Popp·Victor Distler·Kevin Jaksch·Florian Sedlmeir·Christian R. Müller·Nicoletta Haarlammert·Thomas Schreiber·Christoph Marquardt·Andreas Tünnermann·Gerd Leuchs
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Abstract

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.

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Alexandra Popp, Victor Distler, Kevin Jaksch, Florian Sedlmeir, Christian R. Müller, Nicoletta Haarlammert, Thomas Schreiber, Christoph Marquardt, Andreas Tünnermann, Gerd Leuchs. 2019-08-02. Quantum-limited measurements of intensity noise levels in Yb-doped fiber amplifiers. https://doi.org/10.1007/s00340-020-07476-7

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