Technical Comments

Response to Comment on “Probing the Ultimate Limit of Fiber-Optic Strain Sensing”

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Science  20 Jan 2012:
Vol. 335, Issue 6066, pp. 286
DOI: 10.1126/science.1205516

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Abstract

Cranch and Foster argue that the strain resolution of our fiber resonator sensor is not limited by thermal noise. However, extension of common theoretical models to high-finesse passive resonators at low frequency needs further attention. Our findings are consistent with noise of thermodynamic nature for which no experimental evidence in the infrasonic range was available until recently.

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