Implementation of Polarization-Sensitive OFDR With a Digital Coherent Transceiver

作者：Fatima Al-Shaikhli, Maurice O'Sullivan, Charles Laperle, Rongqing Hui · 发表于：IEEE photonics journal · 年份：2026 · DOI：10.1109/jphot.2026.3673128 · 研究领域：Advanced Fiber Optic Sensors、Optical Coherence Tomography Applications、Advanced Photonic Communication Systems

We have demonstrated a polarization-sensitive OFDR which uses a commercially available digital coherent optical transceiver to generate a continuous-phase linear frequency chirp by carrier-suppressed single-sideband modulation. The linearity of the digitally generated chirp was experimentally verified, confirming the suitability of the transceiver for OFDR sensing applications. A phase and polarization diverse coherent homodyne receiver recovers the state of polarization (SOP) of backscattered light using an identically chirped local oscillator. With 26 GHz chirping bandwidth, a spatial resolution of approximately 5mmwas achieved in 200μs. We experimentally measured position dependent relative magnitude and orientation of stress-induced birefringence along the fiber.