Title

An Integrated OFDR System Using Combined Swept-Laser Linearization and Phase Error Compensation

Document Type

Article

Date of Original Version

1-1-2021

Abstract

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

IEEE Transactions on Instrumentation and Measurement

Volume

70

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