An Integrated OFDR System Using Combined Swept-Laser Linearization and Phase Error Compensation
Date of Original Version
This article describes a flexible, compact, semiconductor laser (SCL)-based optical frequency-domain reflectometry (OFDR) design, incorporating swept-laser linearization functions (both passive and active), in situ phase error evaluation function, and phase error compensation function. At the core of the proposed design, a fiber-optic Mach-Zehnder interferometer (MZI) and its electronic digitization components (photodetector and zero-cross circuit) simultaneously perform all the abovementioned functions. Benefitting from the unique digital design, this system combines all functions in a compact fashion without increasing complexity and overhead. Experimental results demonstrate enhanced accuracy using the integrated design compared with prior methods, as well as improved cost-effectiveness, reduced complexity, and optimized form factor.
Publication Title, e.g., Journal
IEEE Transactions on Instrumentation and Measurement
Yao, Zheyi, Thomas Mauldin, Zhenyu Xu, Gerald Hefferman, and Tao Wei. "An Integrated OFDR System Using Combined Swept-Laser Linearization and Phase Error Compensation." IEEE Transactions on Instrumentation and Measurement 70, (2021). doi: 10.1109/TIM.2020.3011485.