Design of Phase Tracking Feedback Compensator for Stabilization of Single Mode Fiber-Optic Mach-Zehnder Interferometer

단일모드 광섬유Mach-Zehnder 간섭계의 안정화를 위한 위상 추적 궤환 보상기의 설계

Single mode optical fiber interferometeric sensors using phase tracking homodyne detection are typically susceptible to environmentally indured temperature fluctuations and other types of disturbances. A simple and effective phase tracking feedback electronic circuit for compensator is described to achieve stabilizing signal output, maximum sensitivity and linearity in the fiber optic Mach-Zehnder infterferometer in the presence of differential phase drift. The phase tracking range of the piezoelectric cyclinder in the reference arm is \ulcorner.7 \ulcornerad and the prabe mass about 1 gram in the sensing arm was used for measurements of the gravity acceleration.