Electrically tunable dispersion compensator with fixed center wavelength using fiber bragg grating

2003 ◽  
Vol 21 (6) ◽  
pp. 1568-1575 ◽  
Author(s):  
N.Q. Ngo ◽  
S.Y. Li ◽  
R.T. Zheng ◽  
S.C. Tjin ◽  
P. Shum
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Center Wavelength ◽  
Dispersion Compensator ◽  
Fixed Center

Fiber ring-cavity laser based on semiconductor optical amplifier

2018 ◽  
Vol 32 (24) ◽  
pp. 1850266
Author(s):  
Min Luo ◽  
Wei Cao ◽  
Haiyan Chen
Keyword(s):  
Quantum Wells ◽  
Fiber Bragg Grating ◽  
Semiconductor Optical Amplifier ◽  
Operating Temperature ◽  
Ring Cavity ◽  
Optical Amplifier ◽  
Injection Current ◽  
Bragg Grating ◽  
Center Wavelength ◽  
Fiber Ring

A fiber ring-cavity laser based on InP/InGaAsP multi-quantum wells semiconductor optical amplifier is proposed and experimentally demonstrated. The laser uses InP/InGaAsP multi-quantum as well as the gain medium and fiber Bragg grating as the wavelength selector. It’s demonstrated that the center wavelength of the output amplified spontaneous emission spectrum for the InP/InGaAsP multiple-quantum wells appears blue shift when its injection current increases. A lasing at central wavelength of 1549.66 nm with the maximum output power of 1.524 mW is obtained with electro-optical efficiency of 1.1% at injection current of 220 mA and the fiber Bragg grating operating temperature of 23[Formula: see text]C. The threshold injection current of the laser is 78 mA. When the operating temperature of fiber Bragg grating increases from 8[Formula: see text]C to 28[Formula: see text]C, the center wavelength of output laser increases from 1549.27 to 1549.59 nm. It shows that the laser has good temperature stability.

Study on the Transmission Spectrum of Fiber Bragg Grating as Temperature Sensor

2013 ◽  
Vol 819 ◽  
pp. 197-201
Author(s):  
Zheng Wang ◽  
Ping Yu Zhu ◽  
Hong Qiang Liang ◽  
Wei Peng
Keyword(s):  
Fiber Bragg Grating ◽  
Transmission Spectrum ◽  
Temperature Sensor ◽  
Blue Shift ◽  
Temperature Sensing ◽  
Bragg Grating ◽  
Optical Spectrum Analyzer ◽  
Center Wavelength ◽  
Accurate Analysis ◽  
Spectrum Width

The temperature sensing characteristic of Fiber Bragg Grating (FBG) has been studied. The temperature sensing equation of FBG is revised. The accurate analysis results are obtained. The center wavelength drifts of the tested FBG are displayed in the screen of Optical Spectrum Analyzer (OSA).The experimental results show that the center wavelength of FBG is thermally red-shift with the rise of the temperature and blue-shift with the decrease of the temperature. The results are agree with the revised temperature sensing equation. It is noticed that the transmission spectrum width (SPEC-WD) of FBG fluctuates with the change of temperature. Nevertheless, the trend of the fluctuation is demonstrably towards increase, which perhaps is some potential auxiliary sensing function in future.

Tunable Dispersion Compensator Based on a Fiber Bragg Grating Written in a Tapered Fiber

2004 ◽  
Vol 16 (12) ◽  
pp. 2631-2633 ◽  
Author(s):  
J. Mora ◽  
A. Diez ◽  
M.V. Andres ◽  
P.-Y. Fonjallaz ◽  
M. Popov
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Tapered Fiber ◽  
Dispersion Compensator

scholarly journals New Method of Temperature and Strain Decoupling Based on Directivity of Fiber Bragg Grating Sensing

2021 ◽  
Vol 2101 (1) ◽  
pp. 012023
Author(s):  
Xiao Huang ◽  
Zhenkun Jin ◽  
Qing Shen
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Experimental Analysis ◽  
Strain Measurement ◽  
The Other ◽  
New Method ◽  
Bragg Grating ◽  
Center Wavelength ◽  
Influence Of Temperature ◽  
Sensing Characteristics

Abstract Fiber Bragg Grating (FBG) has been widely used in temperature and strain measurement. Its center wavelength drift is affected by both temperature and strain. The influence of temperature and strain on center wavelength should be decoupled when measuring. In this paper, the sensing characteristics of FBG which pasted at different angles were simulated and analyzed, and it was found that FBG sensing for strain has strong directivity. A dual FBG composite construction based on the directivity of FBG sensing was proposed. Two FBGs were at an Angle of 62°. One FBG was sensitive to both temperature and strain, and the other was only sensitive to temperature. The structure can realize the decoupling of temperature and strain, and it doesn’t depend on feature of cantilever beam. It was verified by experimental analysis that the decoupling result was good by utilizing the combined FBG structure, and decoupling was realized easily.

scholarly journals High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4307
Author(s):  
Zhe Zhang ◽  
Baijie Xu ◽  
Jun He ◽  
Maoxiang Hou ◽  
Weijia Bao ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Mass Production ◽  
High Efficiency ◽  
Single Mode ◽  
High Energy ◽  
Optical Path Difference ◽  
High Energy Density ◽  
Bragg Grating ◽  
Center Wavelength ◽  
Talbot Interferometer

A high-energy nanosecond-pulsed ultraviolet (UV) laser Talbot interferometer for high-efficiency, mass production of fiber Bragg grating (FBG) array was experimentally demonstrated. High-quality FBG arrays were successfully inscribed in both H2-free and H2-loaded standard single-mode fibers (SMFs) with high inscription efficiency and excellent reproducibility. Compared with the femtosecond pulse that had a coherent length of several tens of micrometers, a longer coherent length (~10 mm) of the employed laser rendered a wider FBG wavelength versatility over 700 nm band (1200–1900 nm) without the need for optical path difference (OPD) compensation. Dense FBG array with center wavelength separation of ~0.4 nm was achieved and more than 1750 FBGs with separated center wavelength could be inscribed in a single H2-free or H2-loaded SMF in theory, which is promising for mass production of FBG arrays in industry. Moreover, precise focusing of laser beam was superfluous for the proposed system due to the high energy density of pulse. The proposed FBG inscription system was promising for industrialization production of dense FBG arrays.

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