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Measurement of the laser relative intensity noise

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3 Author(s)
Enrico Rubiola ; FEMTO-ST Institute, CNRS, Université de Franche Comté, Besancçn, France ; Kirill Volyanskiy ; Laurent Larger

This article describes the measurement of the RIN power spectral density with the cross-spectrum method. Averaging the cross spectrum of two equal and independent channels that measure the same beam, the instrument background is not limited by the single-channel noise. Additionally, the measure can be validated on the basis of simple mathematical properties. This removes the need of a low-noise beam to validate the instrument background, which is a relevant experimental limitation of the (traditional) single-channel method.

Published in:

2009 IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time forum

Date of Conference:

20-24 April 2009