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  Analog phase lock between two lasers at LISA power levels

Diekmann, C., Steier, F., Sheard, B., Heinzel, G., & Danzmann, K. (2009). Analog phase lock between two lasers at LISA power levels. Journal of Physics: Conference Series, 154: 012020. doi:10.1088/1742-6596/154/1/012020.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4648-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-464A-A
Genre: Journal Article

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jpconf9_154_012020.pdf (Publisher version), 454KB
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 Creators:
Diekmann, Christian1, Author              
Steier, Frank1, Author              
Sheard, Benjamin1, Author              
Heinzel, Gerhard1, Author              
Danzmann, Karsten1, Author              
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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 Abstract: This paper presents the implementation of an analog optical phase-locked-loop with an offset frequency of about 20 MHz between two lasers, where the detected light powers were of the order of 31 pW and 200 mu W. The goal of this setup was the design and characterization of a photodiode transimpedance amplifier for application in LISA. By application of a transimpedance amplifier designed to have low noise and low power consumption, the phase noise between the two lasers was a factor of two above the shot noise limit down to 60 mHz. The achievable phase sensitivity depends ultimately on the available power of the highly attenuated master laser and on the input current noise of the transimpedance amplifier of the photodetector. The limiting noise source below 60 mHz was the analog phase measurement system that was used in this experiment. A digital phase measurement system that is currently under development at the AEI will be used in the near future. Its application should improve the sensitivity.

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 Dates: 2009
 Publication Status: Published in print
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 Identifiers: eDoc: 435365
ISI: 10732355
DOI: 10.1088/1742-6596/154/1/012020
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Title: Journal of Physics: Conference Series
Source Genre: Journal
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Pages: - Volume / Issue: 154 Sequence Number: 012020 Start / End Page: - Identifier: -