Fiber-optic temperature profiling for thermal protection system heat shields

Black, Richard J.; Costa, Joannes M.; Zarnescu, Livia; Hackney, Drew; Moslehi, Behzad; Peters, Kara

doi:10.1117/1.oe.55.11.114101

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…Fiber optic sensors based on fiber Bragg gratings (FBGs) have attracted considerable interest due to their inherent immunity to electromagnetic interference and the ease with which they can be multiplexed. Sensing in harsh environments, such as hydro generator bearings [1], gas turbine combustors [2], space heat shields [3], the oil and gas industry [4], and high voltage transformers, usually requires a monitoring temper ature above 400 °C. At extreme temperatures above 450 °C, the refractive index modulation associated with type I FBGs is decayed, making such gratings unsuitable as sensing ele ments.…”

Section: Introductionmentioning

confidence: 99%

Dual-wavelength erbium-doped fiber laser with polarization maintaining regenerated gratings for high temperature and force measurement

Yang¹,

Dong²,

Meng³

et al. 2018

Laser Phys.

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A dualwavelength erbiumdoped fiber laser with bowtie polarization maintaining regenerated fiber Bragg grating (PMRFBG) as a sensor head is proposed. The PMRFBG with enhanced thermal resistance is obtained through isothermal annealing treatment towards a saturated seed grating. The optical signal to noise ratio (SNR) is higher than 61 dB and the 3 dB line width is less than 18 pm at room temperature. The temperature characteristic of the laser sensor is investigated at temperatures ranging from 200 °C to 800 °C. The temperature sensitivities of the laser wavelength in fast (λ f ) and slow (λ s ) axes are 16.2 pm °C−1 and 15.1 pm °C−1 , respectively. The simultaneous measurement of force and temperature could be realized at temperatures ranging from 200 °C to 400 °C, for the force sensitivities of λ f and λ s are 1.333 nm F −1 and 1.346 nm F −1 , respectively. Due to the crosssensitivities of temperature and force, the force sensitivity shows an approximately linear increase at temperatures between 400 °C and 600 °C. The dualwavelength laser sensor is capable of operation at temperatures up to 800 °C due to the high optical SNR and narrow line width.

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Section: Introductionmentioning

confidence: 99%

Dual-wavelength erbium-doped fiber laser with polarization maintaining regenerated gratings for high temperature and force measurement

Yang¹,

Dong²,

Meng³

et al. 2018

Laser Phys.

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show abstract

“…The proposed sensor can be of great interest for monitoring structures that could be deformed and bent while they are exposed to high temperatures, e.g. structures during fire testing, aerospace vehicles parts and components of power plants or other industrial facilities such as pipes, vessels and turbines, among others [10,[19][20][21][22][23].…”

mentioning

confidence: 99%

Regenerated Fiber Bragg Gratings in Multicore Fiber for Multi-Parameter Sensing

Madrigal

Barrera

2020

IEEE J. Select. Topics Quantum Electron.

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Multiple regenerated fiber Bragg gratings were inscribed in all the cores of a seven-core fiber in order to develop a multi-parameter sensor designed to operate at high temperatures. We experimentally showed the possibility of measuring strains of up to 1200 µε, curvatures from 0º to 360º and temperatures up to 1000ºC, with a maximum curvature magnitude of at least 4.6 m -1 and a maximum sensibility of 96 pm/m -1 .

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High temperature and force measurements using a type II cascaded regenerated fiber Bragg grating (RFBG)

Yang

Zhu

et al. 2019

Instrumentation Science & Technology

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Fiber-optic temperature profiling for thermal protection system heat shields

Cited by 6 publications

References 22 publications

Dual-wavelength erbium-doped fiber laser with polarization maintaining regenerated gratings for high temperature and force measurement

Dual-wavelength erbium-doped fiber laser with polarization maintaining regenerated gratings for high temperature and force measurement

Regenerated Fiber Bragg Gratings in Multicore Fiber for Multi-Parameter Sensing

High temperature and force measurements using a type II cascaded regenerated fiber Bragg grating (RFBG)

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