Background
Distributed Temperature Sensing (DTS) uses Raman or Brillouin scattering in optical fiber to measure temperature continuously along the entire fiber length — widely deployed in power cable monitoring, pipeline leak detection, fire detection in tunnels, and industrial process control.
When multiple sensing zones or fiber routes need monitoring, deploying a separate DTS interrogator for each channel is expensive. A 1×N MEMS optical switch allows one DTS unit to sequentially access multiple sensing fibers, dramatically improving system cost-efficiency.
System Architecture
The optical switch is installed between the DTS interrogator and the array of sensing fibers. The control system selects each channel in turn, routing the interrogator's laser pulse and return signal to the target sensing fiber. Temperature data is collected zone by zone, building a complete multi-channel monitoring picture.
Switching can be triggered on a timed schedule (sequential polling) or on-demand for specific zones requiring immediate attention.
Key Benefits
- Lower system cost — One DTS interrogator monitors multiple sensing fibers instead of requiring dedicated units per channel.
- Expanded coverage — Scale from 1×4 to 1×64 channel configurations to match the number of monitoring zones.
- Automated channel switching — Programmable sequential polling across all connected sensing routes.
- Low insertion loss — Minimal signal attenuation preserves DTS measurement accuracy and range.
- Compact & reliable — MEMS module form factor suitable for integration into DTS system enclosures.
- Flexible control — TTL/UART, I2C/UART, or RS232/Ethernet interfaces for seamless DTS controller integration.
Typical Monitoring Applications
- Power cable and substation temperature monitoring
- Oil & gas pipeline leak and intrusion detection
- Tunnel and mine fire early-warning systems
- Data center and industrial facility environmental sensing
- Structural health monitoring of dams, bridges, and buildings
Recommended Products
For DTS multi-channel integration, WXG Optics offers the compact GY-1×N MEMS optical switch module (1×2/1×4/1×8/1×16, TTL/UART or I2C/UART control) and multi-channel switches up to 64 ports for large-scale sensing networks. OEM customization is available.
