A 14-day Correlation-OTDR campaign on four buried fibers in an 8.5-km cable measured up to 800 ps round-trip latency drift and, via a fitted low-pass model, estimated an annual fiber temperature swing of about 25 to 28 K.
Phase Stability of ATA Fiber Optic Cables
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Long-Term Latency Measurement of Deployed Fiber
A 14-day Correlation-OTDR campaign on four buried fibers in an 8.5-km cable measured up to 800 ps round-trip latency drift and, via a fitted low-pass model, estimated an annual fiber temperature swing of about 25 to 28 K.