论文信息 - Long-Period Gratings Dynamic Interrogation With Modulated Fiber Bragg Gratings and Optical Amplification

Long-Period Gratings Dynamic Interrogation With Modulated Fiber Bragg Gratings and Optical Amplification

It is reported a long-period grating (LPG) dynamic interrogation technique based on the modulation of fiber Bragg gratings located in the readout unit of the system. It permits to attenuate the effect of the noise of the electronics in the resolution of the LPG-based sensing head. The concept is tested to detect variations of the external refractive index and a resolution of 2.010 NIR was achieved without system optimization. Additionally, the effect in the sensor resolution when introducing Erbium and Raman optical amplification is experimentally investigated.

[1] A. Vengsarkar,et al. Optical fiber long-period grating sensors. , 1996, Optics letters.

[2] David J. Webb,et al. Temperature insensitive long-period grating sensors in photonic crystal fibre , 2004 .

[3] I. Bennion,et al. Sensitivity of LPGs in PCFs Fabricated by an Electric Arc to Temperature, Strain, and External Refractive Index , 2007, Journal of Lightwave Technology.

[4] David J. Webb,et al. Temperature insensitive long-period grating sensors in photonic crystal fiber , 2004, Photonics North.

[5] Faramarz Farahi,et al. Frequency-modulated multimode laser diode for fiber Bragg grating sensors , 1998 .

[6] Jose Miguel Lopez-Higuera,et al. Handbook of Optical Fibre Sensing Technology , 2014 .

[7] John E. Sipe,et al. Long-period fiber gratings as band-rejection filters , 1995 .

[8] O. Bang,et al. Highly sensitive refractometer with a photonic-crystal-fiber long-period grating. , 2007, Optics letters.

[9] S. James,et al. Optical fibre long-period grating sensors: characteristics and application , 2003 .

[10] W. Marsden. I and J , 2012 .

[11] Orlando Frazão,et al. Refractometric sensor based on a phase-shifted long-period fiber grating. , 2006, Applied optics.

[12] G.M. Williams,et al. Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination , 1996, IEEE Photonics Technology Letters.