Thermally Optimized Polarization-Maintaining Photonic Crystal Fiber and Its FOG Application

Abstract

In this paper, we propose a small-diameter polarization-maintaining solid-core photonic crystal fiber. The coating diameter, cladding diameter and other key parameters relating to the thermal properties were studied. Based on the optimized parameters, a fiber with a Shupe constant 15% lower than commercial photonic crystal fibers (PCFs) was fabricated, and the transmission loss was lower than 2 dB/km. The superior thermal stability of our fiber design was proven through both simulation and measurement. Using the small-diameter fiber, a split high precision fiber optic gyro (FOG) prototype was fabricated. The bias stability of the FOG was 0.0023 °/h, the random walk was 0.0003 °/h, and the scale factor error was less than 1 ppm. Throughout a temperature variation ranging from −40 to 60 °C, the bias stability was less than 0.02 °/h without temperature compensation which is notably better than FOG with panda fiber. As a result, the PCF FOG is a promising choice for high precision FOG applications.

Stabilisation of central wavelength of erbium‐doped fibre source as part of high‐accuracy fibre optic gyroscopes

“…The fibre‐optic path consists of a polariser, a coupler, a multi‐function integrated‐optical circuits, and a fibre coil. The characteristics of these components depend on the temperature [1, 8–11]. Owing to the fact that the OL of the EDFS changes after the fibre‐optic path of the FOG, the TC of the central wavelength at the output port of the FOG after the EDFS and the fibre‐optic path is described as where is the TC caused by the temperature dependence of the central wavelength of the fibre‐optic path of the FOG.…”

Temperature Stability of a Hybrid Polarization-Maintaining Photonic Crystal Fiber Resonator and Its Application in a Resonant Fiber Optic Gyro

“…The undesired ESOP, ESOP2, drifts through the desired ESOP as the temperature of the FRR varies, thus degrading the gyro performance [ 13 , 16 ]. Various research groups have proposed different resonator schemes to overcome polarization-fluctuation, such as a single 90° polarization-axis rotated splice, twin 90° polarization-axis rotated splices, construction of a hybrid single-polarization FRR, and the use of a polarization controller [ 9 , 10 , 11 , 12 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ].…”