Temporal thermal response of Type II-IR fiber Bragg gratings

Liao, Changrui; Wang, Dongning; Li, Yuhua; Sun, Tao; Grattan, K. T. V.

doi:10.1364/ao.48.003001

Cited by 26 publications

(14 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CO 2 lasers emitting at 10.6 µm have been used in previous research to rapidly heat FBGs in bare fibers [ 15 , 16 , 17 ]. In this research, high energy infrared (IR) radiation at 1064 nm was used to heat a polymer matrix composite with embedded FBG temperature sensors.…”

Section: Introductionmentioning

confidence: 99%

Localized Temperature Variations in Laser-Irradiated Composites with Embedded Fiber Bragg Grating Sensors

Jenkins

Joyce

Mechtel

2017

Sensors

View full text Add to dashboard Cite

Fiber Bragg grating (FBG) temperature sensors are embedded in composites to detect localized temperature gradients resulting from high energy infrared laser radiation. The goal is to detect the presence of radiation on a composite structure as rapidly as possible and to identify its location, much the same way human skin senses heat. A secondary goal is to determine how a network of sensors can be optimized to detect thermal damage in laser-irradiated composite materials or structures. Initial tests are conducted on polymer matrix composites reinforced with either carbon or glass fiber with a single optical fiber embedded into each specimen. As many as three sensors in each optical fiber measure the temporal and spatial thermal response of the composite to high energy radiation incident on the surface. Additional tests use a 2 × 2 × 3 array of 12 sensors embedded in a carbon fiber/epoxy composite to simultaneously measure temperature variations at locations on the composite surface and through the thickness. Results indicate that FBGs can be used to rapidly detect temperature gradients in a composite and their location, even for a direct strike of laser radiation on a sensor, when high temperatures can cause a non-uniform thermal response and FBG decay.

show abstract

Section: Introductionmentioning

confidence: 99%

Localized Temperature Variations in Laser-Irradiated Composites with Embedded Fiber Bragg Grating Sensors

Jenkins

Joyce

Mechtel

2017

Sensors

View full text Add to dashboard Cite

show abstract

“…The influence of temperature on the fiber sensor has been investigated by placing the device in an electrical oven and gradually increasing the temperature from room temperature to 100°C in increments of 10°C [13][14][15]. Each tested temperature was maintained for 10 min.…”

mentioning

confidence: 99%

Sub-micron silica diaphragm-based fiber-tip Fabry–Perot interferometer for pressure measurement

et al. 2014

Self Cite

View full text Add to dashboard Cite

We demonstrate a sub-micron silica diaphragm-based fiber-tip Fabry-Perot interferometer for pressure sensing applications. The thinnest silica diaphragm, with a thickness of ∼320 nm, has been achieved by use of an improved electrical arc discharge technique. Such a sub-micron silica diaphragm breaks the sensitivity limitation imposed by traditional all-silica Fabry-Perot interferometric pressure sensors and, as a result, a high pressure sensitivity of ∼1036 pm/MPa at 1550 nm and a low temperature cross-sensitivity of ∼960 Pa/°C are achieved when a silica diaphragm of ∼500 nm in thickness is used. Moreover, the all-silica spherical structure enhanced the mechanical strength of the micro-cavity sensor, making it suitable for high sensitivity pressure sensing in harsh environments.

show abstract

“…Fertein et al wrote LPG and operated them successfully at 1000°C [60]. These findings were confirmed for FBGs by various groups, both for direct [86] and phase mask written gratings [87][88][89][90][91]. Figure 5 depicts the reflectivity of conventional and femtosecond pulse written FBG at high temperatures [86].…”

Section: Annealing Propertiesmentioning

confidence: 70%

Femtosecond pulse written fiber gratings: a new avenue to integrated fiber technology

Thomas

Voigtländer

Becker

et al. 2012

Laser & Photonics Reviews

160

View full text Add to dashboard Cite

The use of ultrashort laser pulses for fiber grating inscription has many advantages in comparison to continuous wave and long pulse lasers. The most important one is that it allows inscription in nonphotosensitive fiber materials. In this paper the principal inscription techniques and the physical properties of femtosecond (fs) pulse written in-fiber gratings are reviewed. The role of focusing and order walk-off on the inscribed structures is emphasized. A fs pulse written fiber Bragg grating (FBG) also has a unique coupling behavior, due to a refractive index change that is independent from the fiber geometry. Selected applications of such gratings for sensing and fiber lasers are discussed.

show abstract

Temporal thermal response of Type II-IR fiber Bragg gratings

Cited by 26 publications

References 17 publications

Localized Temperature Variations in Laser-Irradiated Composites with Embedded Fiber Bragg Grating Sensors

Localized Temperature Variations in Laser-Irradiated Composites with Embedded Fiber Bragg Grating Sensors

Sub-micron silica diaphragm-based fiber-tip Fabry–Perot interferometer for pressure measurement

Femtosecond pulse written fiber gratings: a new avenue to integrated fiber technology

Contact Info

Product

Resources

About