DVS Integrated Module
Product Overview
Distributed Optical Fiber Sensing (DOFS) systems utilize optical fibers as sensors. Based on the generation mechanisms of Rayleigh scattering, Brillouin scattering, and Raman scattering, and employing Optical Time Domain Reflectometer (OTDR) technology, these systems enable the measurement, analysis, monitoring, and localization of physical quantities (such as temperature, vibration, or strain) along the fiber.
- DAS (Distributed Acoustic Sensing)
- DVS (Distributed Vibration Sensing)
Fholink's DVS Integrated Module operates on the phase-sensitive OTDR (Φ-OTDR) principle. Using a single standard optical fiber for transmission, it detects Rayleigh backscattered light within the fiber to extract intensity information, enabling the detection of vibration and other signals. It is widely used in applications such as oil and gas pipelines, perimeter security, high-speed railways, and rail transit.
Product Features
1. High Integration
2. High Stability and Reliability
3. Flexible Control Method
4. Single-Channel or Dual-Channel Options Available
Technical Parameters
| Product Model：FH-DVS | |||||
| Parameters | Unit | Min. | Typ. | Max. | Remarks |
| Sensing Distance | km | 40 | |||
| UNL/EDFA | |||||
| Center Wavelength | nm | — | 1550.12 | — | |
| Linewidth | KHz | 3 | |||
| Pulse Width | ns | 60 | 100 | ||
| Repetition Rate | KHz | 1 | 20 | ||
| Pulse Peak Optical Power | dBm | 23 | 30 | ||
| AOM | |||||
| Rise/Fall Time | ns | — | — | 30 | Built-in Driver |
| Input Impedance | Ohm | — | 50 | — | |
| Frequency Shift | MHz | — | 80 | — | |
| Detector | |||||
| Wavelength | nm | 800～1700 | |||
| Gain | V/A | 30K | |||
| Coupling Type | AC | ||||
| Output Signal Bandwidth | MHz | 100 | |||
| Modulation Mode | External Modulation | ||||
| Remarks: Single-channel sensing (FH-DVS-1) or dual-channel sensing (FH-DVS-2) optional | |||||
Product Applications
1. DVS Distributed Optical Fiber Vibration Sensing
2. Power Cable Monitoring
3. Traffic Line Monitoring (e.g., high-speed railways, subway tracks)
4. Energy Pipeline Monitoring (e.g., oil, natural gas)
5. Perimeter Security
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ꁇBackbone network
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ꁇMan/private network
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ꁇAccess network
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ꁇCore network
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ꁇSwitches
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ꁇOptical Transceivers
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ꁇNetwork
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ꁇLaser and sensing
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ꁇOptical Fiber Sensing
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ꁇOptical Component
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ꁇFiber Optic Patch Cord
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ꁇOptical Amplifier
