Haroud Karim, Bohnert Klaus, Frank Andreas, Brändle Hubert
Opt Lett. 2002 Jun 1;27(11):897-9. doi: 10.1364/ol.27.000897.
The effects of dispersion in the highly birefringent fiber Bragg grating reflectors of a polarimetric elliptical-core fiber laser sensor are experimentally and theoretically investigated. The laser sensor is designed to measure fluid pressure. It is experimentally and theoretically shown that the wavelength-dependent phase shifts in the gratings can be employed to remove the near degeneracy of the polarization mode beat frequencies of a given order, which substantially improves the resolution of the sensor. A resolution of a few parts in 10(6) of the free spectral range of the laser is demonstrated.
对偏振椭圆芯光纤激光传感器的高双折射光纤布拉格光栅反射器中的色散效应进行了实验和理论研究。该激光传感器旨在测量流体压力。实验和理论表明，光栅中与波长相关的相移可用于消除给定阶次的偏振模拍频的近简并性，这大大提高了传感器的分辨率。展示了该激光自由光谱范围的10^6分之几的分辨率。
