Experimental investigation of optical fiber temperature sensors at cryogenic temperature and in high magnetic fields

Tanaka, Yuko; Ogata, Masafumi; Nagashima, K.; Agawa, Hisao; Matsuura, Sumio; Kumagai, Yoshito

doi:10.1016/j.physc.2010.05.230

Cited by 10 publications

(2 citation statements)

References 5 publications

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“…According to the FBG coupling theory [6], the fixed period fiber grating can couple an guide mode to another opposite direction guide mode [7]. Then a narrow band reflection is happened and the central wavelength of reflection (FBG wavelength) should meet:…”

Section: Temperature Sensor Model Of the Fiber Gratings Sensormentioning

confidence: 99%

Investigation on high temperature characteristics of FBG sensors

Liu

2015

Optik

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Section: Temperature Sensor Model Of the Fiber Gratings Sensormentioning

confidence: 99%

Investigation on high temperature characteristics of FBG sensors

Liu

2015

Optik

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“…On the other hand, cryogenic systems based on superconducting magnets find application, among other fields, in medicine for magnetic resonance imaging and also in nuclear fusion energy production, as in the case of the ITER Project [3]. In this context, the hot-spot temperature, the thermal stress and the maximum pressure in the cable in conduit conductors and the risk of helium explosion are some parameters to be measured [4]- [6]. Furthermore, these cryogenic systems with high intensity magnetic fields demand for monitoring devices shielded to the presence of those fields and, simultaneously, that are able to prevent heat transfer from their lead wires.…”

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confidence: 99%

Cryogenic Temperature Response of Reflection-Based Phase-Shifted Long-Period Fiber Gratings

Martins

Caldas

Teixeira

et al. 2015

J. Lightwave Technol.

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In this study, we investigated the temperature behavior of phase-shifted long-period fiber gratings (PS-LPFGs) inscribed in two types of optical fiber: B/Ge and SMF28. The experiments were carried out from 5 to 305 K using a superconducting quantum interference device magnetometer. The average temperature sensitivity obtained of −0.43 nm/K for PS-LPFGs inscribed in the B/Ge fiber is one order of magnitude larger than for PS-LPFGs inscribed in the SMF28 fiber, in the 60-240 K range. Values ranging from −0.08 nm/K up to 0.2 nm/K were obtained in the 5-35 K temperature range, which are considerably better than previous results achieved for metal-coated FBGs and also for LPFGs inscribed in a similar B/Ge codoped fiber. Nevertheless, further work is required in order to correctly address sensor reliability. Index Terms-Cryogenic temperatures, long-period fiber grating, optical fiber sensor. I. INTRODUCTION S YSTEMS operating at cryogenic temperatures are becoming increasingly important in the energy sector, transportation, and medicine technology. Cryogenic fuels such as liquid hydrogen (also employed in aerospace vehicles), oxygen and liquefied natural gas are often considered as major energy alternatives to fossil fuels. To ensure the safe storage, transfer and dispensing of liquefied fuels, highly sensitive and reliable Manuscript

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