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Title:

Influence of the length of a uniform fiber Bragg grating on the accuracy of measuring an impulsive strain

Group publication title:

Optica Applicata

Creator:

Kaczmarek, Zdzisław ; Sikora, Aleksandra

Subject and Keywords:

optyka ; optical fiber Bragg grating sensor ; impulsive strain, converting error

Description:

Optica Applicata, Vol. 38, 2008, nr 2, s. 305-314

Publisher:

Oficyna Wydawnicza Politechniki Wrocławskiej

Place of publication:

Wrocław

Contributor:

Gaj, Miron. Redakcja ; Urbańczyk, Wacław. Redakcja

Date:

2008

Resource Type:

artykuł

Source:

<sygn. PWr A3481II> ; click here to follow the link ; click here to follow the link

Language:

eng

Relation:

Optica Applicata ; Optica Applicata, Vol. 38, 2008 ; Optica Applicata, Vol. 38, 2008, nr 2 ; Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki

Location:

Politechnika Wrocławska

Abstrakt:

The influence of the length of a uniform, unapodized and apodized fiber Bragg grating on the accuracy of converting an impulsive strain is discussed. Using the transfer matrix description of the grating, derived from the coupled mode theory, the reflectivity spectrum changes of the grating are calculated, which are caused by the strain pulses propagating along it. On the basis of the introduced effective central frequency of the grating, the rise-time error (RTE) and the amplitude error of the frequency change (AFCE) were calculated as a function of the ratio of the strain pulse leading front width to the grating length. These errors were calculated for different waveforms of the strain pulses. Charts presenting results of the calculations allow to select the proper length of the uniform fiber grating, when the converting error is established, and the waveform of the pulse is identified.

Rights:

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Access Rights:

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