Stress Measurement of Long-Period Fiber Bragg Gratings

High-temperature and stress response behavior of femtosecond laser

Eccentric fiber Bragg grating (EFBG) is inscribed in standard communication single-mode fiber using femtosecond laser pulses, and the temperature and strain sensing characteristics are

Highly Birefringent FBG Based on Femtosecond Laser-Induced

We present and demonstrate a highly birefringent fiber Bragg grating (Hi-Bi FBG) that was fabricated using a femtosecond laser to induce a sawtooth stress region near the FBG.

Strain Measurement Validation of Embedded Fiber Bragg Gratings

The results shown validate Bragg gratings as an accurate method for measuring strain within a composite when the optical fiber is oriented parallel to surrounding structural fibers in a quasi

Long Period Fibre Gratings

In this chapter we will make a review of the relevant aspects of LPFGs.

Strain Measurement with Fiber Bragg Grating Sensors

This simple theory complies quite well with low reflective Bragg gratings (<20% peak reflection factor) while the theory of high reflective Bragg gratings (>90% peak reflection factor) is much more difficult

In-fiber Long-period Grating and Fiber Bragg Grating-based

In this study, we experimentally demonstrated that a high-sensitivity fiber sensor can be used for the remote sensing of temperature and stress simultaneously. The proposed sensor includes several

In situ stress monitoring and calibration of fiber Bragg Gratings

This experiment allows a defined application and variation of stress on the aluminum sample made of different alloys, and conducts tests at varying temperatures up to the solidus

Fabrication long period fiber Bragg grating based on no-core fiber for

In this study we have inscribed two long period fibre Bragg grating (LPFBG) experimentally, and used these two LPFBG as sensors for measure sucrose concentration. i.e. for

Fiber Bragg Grating Sensors with Enhanced Sensitivity for High

In this work, we investigate the sensing performance of Fiber Bragg Gratings (FBGs) engineered to operate near EPs through precise structural tuning. By aligning the reflection spectrum edges with

Simultaneous Temperature and Strain Measurement in Fiber Bragg

This study proposes a method to simultaneously measure the temperature and strain of a single FBG using ML while employing a wavelength-stabilized wavelength-swept laser (WSL).

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