Title :
Research of second order backscatter error in the I-FOG
Author :
Xu, Dingjie ; Song, Hongru ; Wei, Wang
Author_Institution :
Autom. Coll., Harbin Eng. Univ., Harbin, China
Abstract :
Second order backscatter error is one of the main error sources in high precision interferometric fiber optic gyro(I-FOG). In this paper, the error model of second order backscatter is established. Then, a method of three carrier modulation has been proposed to decrease second order backscatter error. Compared with no-carrier modulation, the error caused by second order backscatter can be significantly reduced. Simulation results performed with three carrier modulation show about 6 times improvement of second order backscatter error compared with no-carrier modulation.
Keywords :
backscatter; error analysis; fibre optic gyroscopes; light interferometry; optical modulation; I-FOG; carrier modulation; error model; high precision interferometric fiber optic gyro; second order backscatter error source; Backscatter; Gyroscopes; Modulation; Optical fibers; Optical interferometry; Sagnac interferometers; Temperature measurement; I-FOG; backscatter error; carrier modulation;
Conference_Titel :
Remote Sensing, Environment and Transportation Engineering (RSETE), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-9172-8
DOI :
10.1109/RSETE.2011.5965285
