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IV. References

System Architecture

• Fiber interrogator: A narrow-linewidth pulsed laser sends coherent optical pulses into standard single-mode fiber (SMF). Backscattered Rayleigh signals are captured using a high-speed photodetector and digitized at multi-MHz sampling rates.
• Pulse scheme: Variable pulse-width, coded pulse sequences (e.g., Golay codes) for range-resolution trade-offs, with dual-pulse interleaving for polarization diversity.
• Front-end optics: Polarization diversity receiver, low-noise EDFAs, narrowband filtering to improve SNR over tens of kilometers.
• Timing & synchronization: GPS-disciplined oscillator for sub-microsecond timing and multi-interrogator synchronization over distributed networks.
• Edge compute modules: FPGA-based pre-processing for coherent phase extraction; GPU servers for real-time classification and localization.
• Management & interfaces: REST/ gRPC APIs, OPC-UA for industrial integration, and standardized data formats (e.g., miniSEED-inspired or HDF5).

Review of DASS-490 (The Content): Assuming the intended video is DASS-490 (released around Feb 2023), here is a review of the title: I’m not sure what "dass490javhdtoday020115 min upd" refers