Two-Port Noise Suppression in Dual-Polarization Interferometric Fiber-Optic Gyroscope

Abstract

Since the polarization non-reciprocity errors are canceled out through optical compensation in dual-polarization interferometric fiber-optic gyroscopes (IFOGs), two ports, namely, the reciprocal and nonreciprocal ports, are both feasible sensing output. In this work, we propose and demonstrate a weighted subtraction method for noise suppression that utilizes the partial correlated two-port signals simultaneously. The relative intensity noise has reduced to 56.2% of its original value in the experiment and agrees with the theoretical analysis; as a result, the angle random walk is suppressed from 5.7 × 10 −2 to 3.2 × 10 −2• / √ h with a 2-km-long fiber. The improvement on short-and long-term stability performance has been experimentally verified, which makes dual-polarization IFOG configuration promising for many applications.

Design of an integrable double-sided optoplasmonic gyroscope via a bent hybrid structure

“…Plasmons demonstrate useful characteristics like high sensitivity and small dimensions in optical frequencies, and these may be employed in various optoelectronic-based devices 18 – 20 . Since 2011, researches have been conducted on the application of surface plasmon polaritons (SPPs) in gyroscope structures.…”