AI 中文总结
研究通过类似BB84极化编码方案，在弯曲不敏感光纤链路上评估温度、轴向应变和扭转对偏振传输及密钥恢复的影响，确定扭转是主要损伤，证明其可作为集成通信与传感架构中的传感机制。
AI 中文摘要
极化编码光纤链路为研究共享光通道中通信与传感功能的共存提供了有用平台。本文通过对弯曲不敏感光纤链路实施类似BB84极化编码方案的经典模拟，评估温度、轴向应变和扭转如何影响偏振传输状态及二进制密钥恢复。结果表明温度和轴向应变影响小，扭转会显著影响，中间扭转角擦除率达50%，接近180°时偏振态倾向恢复。这些结果确定扭转是主要损伤，并证明其在集成通信与传感架构中用作传感机制的潜力。
英文摘要
Polarization-encoded optical-fiber links provide a useful platform for investigating the coexistence of communication and sensing functions in a shared optical channel. In this work, a classical analog of the BB84 polarization-encoding scheme was implemented over a bend-insensitive fiber link to evaluate how temperature, axial strain, and torsion affect the transmitted state of polarization and the recovery of a binary key. Temperature variations from 24 °C to 35 °C and axial strain up to 2 mε produced only minor polarization-state variations and did not affect key recovery. In contrast, fiber torsion induced a pronounced retarder-like evolution of the state of polarization, reducing the detector-intensity contrast used for bit discrimination and degrading key recovery. For intermediate torsion angles, the erasure rate reached 50%. The polarization state tended to recover for rotations close to Δθ = 180°, consistent with the oscillatory response observed on the Poincaré sphere. These results identify torsion as the dominant impairment in the tested polarization-encoded fiber link and demonstrate its potential use as a sensing mechanism in integrated communication-and-sensing architectures.
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