Fiber Bragg grating cryogenic temperature sensors

Gupta, Sheifali; Mizunami, Toru; Yamao, Takashi; Shimomura, Teruo

doi:10.1364/ao.35.005202

Cited by 109 publications

(58 citation statements)

References 11 publications

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“…3, with a and the sensitivity of 12.01 pm/ C. This mainly arises from a combination of the maximum deviation of the sensor data at each temperature over the range from room temperature to 300 C and the RBW of the OSA. The sensor could also be adapted for measurements below room temperature using a slightly different wavelength range of the probe grating RB with appropriate material substrates [8], e.g., employing Teflon, as the bare silica fiber has a negative thermal expansion coefficient below 150 K [9]. Further detailed studies on the laser-based cryogenic measurements are interesting and will be the subject of future work.…”

Section: Experimental Arrangement and Resultsmentioning

confidence: 99%

Bragg Grating-Based Fiber-Optic Laser Probe for Temperature Sensing

Mandal

Pal

Sun

et al. 2004

IEEE Photon. Technol. Lett.

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Abstract-A novel Bragg grating-based fiber-optic laser probe for temperature sensing using erbium-doped fiber as the active gain medium is reported. The combination of a chirped grating and a normal grating was used to form the laser cavity to achieve temperature-tunable laser action over a wide measurement range. The laser probe used a metal sheath to enhance its mechanical strength and contain the normal grating at the sensing point. The temperature dependence of the wavelength of the laser probe gives a sensitivity of 12.01 pm/ C and a repeatability of 1 7 C from room temperature to 300 C.

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Section: Experimental Arrangement and Resultsmentioning

confidence: 99%

Bragg Grating-Based Fiber-Optic Laser Probe for Temperature Sensing

Mandal

Pal

Sun

et al. 2004

IEEE Photon. Technol. Lett.

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“…Fibre Bragg gratings have been shown to work effectively at extremely low temperatures 64 , as have a number of other devices 65,66 . At moderately low temperatures, approximately − 50°C, problems occur with the packaging and the batteries in devices.…”

Section: Low Temperaturementioning

confidence: 99%

Precision in harsh environments

2016

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Microsystems are increasingly being applied in harsh and/or inaccessible environments, but many markets expect the same level of functionality for long periods of time. Harsh environments cover areas that can be subjected to high temperature, (bio)-chemical and mechanical disturbances, electromagnetic noise, radiation, or high vacuum. In the field of actuators, the devices must maintain stringent accuracy specifications for displacement, force, and response times, among others. These new requirements present additional challenges in the compensation for or elimination of cross-sensitivities. Many state-of-the-art precision devices lose their precision and reliability when exposed to harsh environments. It is also important that advanced sensor and actuator systems maintain maximum autonomy such that the devices can operate independently with low maintenance. The next-generation microsystems will be deployed in remote and/or inaccessible and harsh environments that present many challenges to sensor design, materials, device functionality, and packaging. All of these aspects of integrated sensors and actuator microsystems require a multidisciplinary approach to overcome these challenges. The main areas of importance are in the fields of materials science, micro/nano-fabrication technology, device design, circuitry and systems, (first-level) packaging, and measurement strategy. This study examines the challenges presented by harsh environments and investigates the required approaches. Examples of successful devices are also given.

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“…However, for a finite temperature change, T, especially for the temperatures around and above the room temperature, Eq. (1) can be rewritten as a linear form as [8] …”

Section: Theory Fbg As a Temperature Sensormentioning

confidence: 99%

Fiber Optic Thermographic Detection of Flaws in Composites

Wu¹,

Winfree²,

Thompson³

et al. 2010

AIP Conference Proceedings

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ABSTRACT. Optical fibers with multiple Bragg gratings bonded to surfaces of structures were used for thermographic detection of subsurface defects in structures. The investigated structures included a 10-ply composite specimen with subsurface delaminations of various sizes and depths. Both during and following the application of a thermal heat flux to the surface, the individual Bragg grating sensors measured the temporal and spatial temperature variations. The obtained data were analyzed with thermal modeling to reveal particular characteristics of the interested areas. These results were found to be consistent with the simulation results.

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Fiber Bragg grating cryogenic temperature sensors

Cited by 109 publications

References 11 publications

Bragg Grating-Based Fiber-Optic Laser Probe for Temperature Sensing

Bragg Grating-Based Fiber-Optic Laser Probe for Temperature Sensing

Precision in harsh environments

Fiber Optic Thermographic Detection of Flaws in Composites

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