Accuracy improvement of Fiber Bragg Grating peak wavelength demodulation using wavelet transform and various center wavelength detection algorithms

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.

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Bragg wavelength detection in fiber Bragg grating sensor by combining nonlinear least squares with Kalman smoothing

10.1117/12.688632 ◽

2006 ◽

Author(s):

Y. Tang ◽

Y. C. Chu ◽

C. C. Chan ◽

S. Liu

Keyword(s):

Least Squares ◽

Fiber Bragg Grating ◽

Nonlinear Least Squares ◽

Fiber Bragg Grating Sensor ◽

Bragg Grating ◽

Bragg Wavelength ◽

Kalman Smoothing ◽

Wavelength Detection ◽

Bragg Grating Sensor

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Fundamental limits in fiber Bragg grating peak wavelength measurements (Invited Paper)

10.1117/12.623444 ◽

2005 ◽

Cited By ~ 26

Author(s):

Shellee D. Dyer ◽

Paul A. Williams ◽

R. J. Espejo ◽

Jonathan D. Kofler ◽

Shelley M. Etzel

Keyword(s):

Fiber Bragg Grating ◽

Bragg Grating ◽

Peak Wavelength ◽

Fundamental Limits

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.819.197 ◽

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.

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