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Birefringent π-Phase-Shifted Fiber Bragg Gratings for Sensing at 1000 °C Fabricated Using an Infrared Femtosecond Laser and a Phase Mask
2018 Edition, Volume 36, December 1, 2018 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Birefringent π-phase-shifted Bragg gratings for multi-parameter sensing at temperatures ~1000 °C are written inside a standard single mode silica optical fiber (SMF-28) with infrared femtosecond...

Birefringent $\pi$ -phase-shifted fiber Bragg gratings for sensing at 1000°C fabricated using an infrared femtosecond laser and a phase mask
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Birefringent $\pi$ -phase-shifted Bragg gratings for multi-parameter sensing at temperatures ~1000°C are written inside a standard single mode silica optical fiber (SMF-28) with infrared femtosecond...

Femtosecond-Laser-Inscribed Fiber Bragg Gratings for High-Tempertature Sensing
2018 Edition, October 1, 2018 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We demonstrated the inscription of various fiber Bragg gratings (FBGs) for high-temperature sensing applications. Three different femtosecond laser inscription methods, including phase-mask method, point-by-point inscription method,...

Capillary fiber Bragg grating fabricated by Femtosecond laser for sensing applications
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We report the demonstration of fiber Bragg grating (FBG) fabricated in silica capillary fiber by use of femtosecond laser. The FBG is inscribed in the silica cladding surrounding the air core by a transversal scanning method through...

Dual-polarization distributed feedback fiber laser sensor based on femtosecond laser-inscribed in-fiber stressors for simultaneous strain and temperature measurements
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

We propose and experimentally demonstrate a novel dual-polarization distributed feedback fiber laser (DFB-FL) sensor based on femtosecond laser-inscribed in-fiber stressors. The resonant cavity of the DFB-FL sensor consists of a...

Engineered p-Phase-Shifted Fiber Bragg Gratings for Efficient Distributed Feedback Raman Fiber Lasers
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Distributed feedback Raman fiber lasers with π- phase-shifted uniform gratings are modelled and simulated in the steady state, to optimize their performance. Using parameters of realistic devices, it is found that the position change of the...

Ultrafast-laser-induced negative-index fiber Bragg gratings with enhanced thermal stability
2017 Edition, April 1, 2017 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Negative-index fiber Bragg gratings (FBGs) were fabricated using 800 nm femtosecond laser overexposure and thermal regeneration. A positive-index type I-IR FBG was first inscribed in H2-free fiber with a uniform...

π-phase-shifted Fiber Bragg Grating for Strain Measurement with High Spatial Resolution
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Because the static strain measured by a uniform fiber Bragg grating is a mean value along the grating length, it is difficult to precisely measure a local strain when encountering nonuniformity. It is found that phase-shifted...

All-Fiber 2.07 μm Distributed Feedback Laser Based on π-Phase-Shifted FBG Inscribed in Heavily Doped Holmium Fiber by Femtosecond Laser Pulses
2019 Edition, June 1, 2019 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Distributed-feedback (DFB) fiber laser is a versatile source of low-noise single-frequency radiation that finds applications in spectroscopy, optical communications and sensing devices. Depending on the active medium, different lasing wavelengths can be obtained:...

Theoretical Analysis of pi-Phase-Shifted Fiber Bragg Grating for Longitudinal Ultrasonic Acoustic Wave
2019 Edition, December 1, 2019 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a detailed theoretical analysis of pi-phase-shifted fiber Bragg grating (π-FBG) for longitudinal ultrasonic (US) acoustic stain wave. The influence of grating controlling parameters (grating length, index...

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