Fiber Optic Signal Processing Design

I want to use burried optical fibre cable as a sensor to detect movement .

For a long perimeter, buried boundary, pipeline, wall or railway where the alarm must be localised along kilometres of cable, the recommended architecture is a one-ended coherent phase-sensitive optical time-domain reflectometry system (Φ-OTDR), commonly implemented as distributed acoustic sensing (DAS). The interrogator launches coherent pulses into a passive single-mode fiber and measures changes in Rayleigh backscatter phase versus distance. Reviews, a published long-perimeter field trial and current commercial platforms support fence, buried and linear-asset use, while their reported performance remains installation-specific.

For a short fence where only a small number of zones is required, a zoned interferometric system can be lower-cost and easier to industrialise. FBG arrays are preferable when strain must be measured at selected discrete points. Intensity/microbend systems are suitable only when low cost matters more than precise location and immunity to optical-loss drift.

Scope
– Model and simulate the complete DSP flow from raw photonic input to line-ready output.
- build a system which can detect very small changes in the light when it is tapped or it detects any kind of vibrations
– Select or specify appropriate algorithms (e.g., adaptive equalisation, phase-noise mitigation, OFDM/PS, or another high-spectral-efficiency scheme) that meet the bandwidth and latency targets.
– Deliver a system which generates the narrow band laser light and receives it and finds the difference between the transmitted and the received signals .
– Document assumptions, performance metrics, and integration hooks so my hardware team can plug your block straight into the existing design.

If you have prior work in coherent receivers, DAS, or fibre-optic reflectometry, let me see a short sample or reference so I can gauge fit quickly. Looking forward to collaborating on a fast, clean signal path.