Fast Pump-Power-Independent Brillouin Fiber Optic sensor

Motil, Avi; Danon, Orr; Peled, Yair; Tur, Moshe

doi:10.1364/ofc.2014.m3j.5

Cited by 5 publications

(1 citation statement)

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“…But ∆g, and consequently CSA, linearly depends on the pump pulse power, making the accurate determination of the calibration factor CSA extremely difficult, since the value of the pump pulse power is not always known at all time and for every point along the fiber. The Double SA-BOTDA (DSA-BOTDA) methods 8,9 were developed to tackle this drawback, where by using readings taken on both slopes of the BGS the measurement turns to be pump power independent. Two post processing approaches for the collected DSA-BOTDA data were demonstrated, one based on the sum and difference 8 of the two consecutive…”

Section: Introductionmentioning

confidence: 99%

The effect of the gain dependency of the linewidth of Brillouin amplification on double slope-assisted dynamic sensing techniques

et al. 2015

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The effect of the gain dependency of the Brillouin linewidth on double-slope-assisted Brillouin optical domain, dynamic sensing techniques is studied. These double-slope methods are immune to pump-power related peak Brillouin gain variations, however, they are not immune to gain-dependent variations of the shape of the Brillouin gain spectrum. For a 15ns pump pulse, this gain-dependent shape of the normalized Brillouin gain is shown to lead to a 5.5 [%/dB] strain error when the double-slope sum-difference approach is used, compared with a 7 [%/dB] error when the double-slope ratio approach is used. Ways to compensate for these issues are discussed.

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Section: Introductionmentioning

confidence: 99%