Strain Calibration of Substrate-Free FBG Sensors at Cryogenic Temperature

Venkataraman Venkatesan; Klaus-Peter Weiss; Ram Bharti; Holger Neumann; Rajinikumar Ramalingam

Internet of Things. IoT Infrastructures. Second International Summit, IoT 360° 2015, Rome, Italy, October 27-29, 2015, Revised Selected Papers, Part II

Research Article

Strain Calibration of Substrate-Free FBG Sensors at Cryogenic Temperature

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@INPROCEEDINGS{10.1007/978-3-319-47075-7_24,
    author={Venkataraman Venkatesan and Klaus-Peter Weiss and Ram Bharti and Holger Neumann and Rajinikumar Ramalingam},
    title={Strain Calibration of Substrate-Free FBG Sensors at Cryogenic Temperature},
    proceedings={Internet of Things. IoT Infrastructures. Second International Summit, IoT 360° 2015, Rome, Italy, October 27-29, 2015, Revised Selected Papers, Part II},
    proceedings_a={IOT360},
    year={2017},
    month={6},
    keywords={Fiber Bragg gratings (FBG) Cryogenic applications Strain sensitivity Strain calibration},
    doi={10.1007/978-3-319-47075-7_24}
}

Venkataraman Venkatesan
Klaus-Peter Weiss
Ram Bharti
Holger Neumann
Rajinikumar Ramalingam
Year: 2017
Strain Calibration of Substrate-Free FBG Sensors at Cryogenic Temperature
IOT360
Springer
DOI: 10.1007/978-3-319-47075-7_24

Venkataraman Venkatesan, Klaus-Peter Weiss¹, Ram Bharti², Holger Neumann¹, Rajinikumar Ramalingam¹^,*

1: Karlsruhe Institute of Technology (KIT)
2: Indian Institute of Technology (IIT) Roorkee

*Contact email: rajini-kumar.ramalingam@kit.edu

Abstract

Strain calibration measurements are performed for acrylate coated, substrate-free fiber Bragg grating (FBG) sensors at room temperature of 298 K and cryogenic temperature of 77 K. A 1550 nm Bragg wavelength (λ) FBG sensor, with its sensing part not being bonded to any surface, is subjected to axial strain using MTS25 tensile machine available at Cryogenic Material tests Karlsruhe (CryoMaK), KIT. The Bragg wavelength shift (Δλ) versus induced strain (ε) is regressed with a linear polynomial function and the strain sensitivity obtained is found to be 0.9 pm/µε at both the temperatures, verifying that the FBG strain sensitivity is independent of temperature.

Keywords: Fiber Bragg gratings (FBG) Cryogenic applications Strain sensitivity Strain calibration

Published: 2017-06-05
Appears in: SpringerLink

: http://dx.doi.org/10.1007/978-3-319-47075-7_24