Shot-noise-limited laser power stabilization for the AEI 10 m prototype interferometer

Jonas Junker; Patrick Oppermann; Benno Willke

doi:10.1364/OL.42.000755

Shot-noise-limited laser power stabilization for the AEI 10 m prototype interferometer

Jonas Junker^*, Patrick Oppermann, Benno Willke

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

The AEI 10 m Prototype interferometer is an experiment to investigate the standard quantum limit of interferometry and, in particular, its relevance in gravitational-wave detection. As such it has stringent requirements on the power stability of its high-power light source. In this Letter we present the power stabilization concept of the 35 W Nd:YAG laser system used in the AEI 10 m Prototype. With a shot-noise-limited multiphotodetector sensing scheme we achieved a relative power noise level of 1.8 × 10^-9 Hz^-1/2 in a frequency band of 100 Hz to 1 kHz. The limiting noise sources at lower and higher frequencies are analyzed, and possible improvements on the power noise sensing are discussed.

Original language	English
Pages (from-to)	755-758
Number of pages	4
Journal	Optics Letters
Volume	42
Issue number	4
DOIs	https://doi.org/10.1364/OL.42.000755
Publication status	Published - 15 Feb 2017
Externally published	Yes

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abstract = "The AEI 10 m Prototype interferometer is an experiment to investigate the standard quantum limit of interferometry and, in particular, its relevance in gravitational-wave detection. As such it has stringent requirements on the power stability of its high-power light source. In this Letter we present the power stabilization concept of the 35 W Nd:YAG laser system used in the AEI 10 m Prototype. With a shot-noise-limited multiphotodetector sensing scheme we achieved a relative power noise level of 1.8 × 10-9 Hz-1/2 in a frequency band of 100 Hz to 1 kHz. The limiting noise sources at lower and higher frequencies are analyzed, and possible improvements on the power noise sensing are discussed.",

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Shot-noise-limited laser power stabilization for the AEI 10 m prototype interferometer

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