Fiber Optic Sensing Perimeter Security Products
The Praetorian is Hawk's dedicated fiber optic perimeter security system, built for facilities, borders, and critical infrastructure that cannot afford detection gaps. Unlike camera-based systems that require continuous human monitoring, the Praetorian operates autonomously around the clock, processing vibration data in real time and reporting verified threats without alerting the intruder. Its hardware is engineered for long-distance, continuous coverage across numerous installation types.
Principle of Operation
The Praetorian uses two core mechanisms to locate and classify threats: Rayleigh backscatter and time of flight.
Rayleigh backscatter captures vibration signatures by measuring changes in the light scattered back through the fiber. When physical disturbances compress the fiber core, the intensity and frequency of the Rayleigh component shift. The system's signal analysis software reads those shifts to classify the event type.
Time of flight pinpoints the exact location of that disturbance. Each time the system emits a laser pulse, a high-speed clock starts. Backscattered light returns to the detector timestamped, and because light travels through fiber at a known, consistent speed (approximately two-thirds the speed of light through a vacuum), that timestamp converts directly to a distance on the fiber. This approach places intrusions within one meter of their actual position.
A field-programmable gate array (FPGA) enables ultra-fast parallel processing of returned signals, so the system never has to time-splice or skip sections of data. There is zero window in which an intruder can go undetected.
HAWK's Fiber Optic Sensing Perimeter Security Products
Supported Industries
We deploy the Praetorian across industries where perimeter integrity is critical:
- Military installations and army barracks
- International and country borders
- Airports and transportation corridors
- Prisons and correctional facilities
- Explosive storage and hazardous material sites
- Unmanned and remote industrial sites
- Farms and large rural properties
Detectable Activities
The Praetorian fiber optic perimeter security system identifies a broad set of physical intrusion signatures:
- Foot traffic movement along or near a perimeter
- Fence cutting or climbing
- Covert sub-terrain movement via buried fiber
- Vehicle approach along a perimeter
- Digging, trenching, or undermining activity
Geo-tag alarms associate each detected event with a specific location on the fiber map, so security personnel know exactly where to respond.
Hardware Features
Every hardware decision in the Praetorian prioritizes detection reliability and low operational overhead. The result is fiber optic sensing perimeter security products that install once, require no ongoing calibration, and continue performing accurately in the most demanding field conditions.
- No time splicing: The FPGA processes all returned data in parallel, leaving no detection gaps
- Cut-fiber immunity: When installed as a loop across both channels, the system continues monitoring on both sides of a break and reports the damage simultaneously
- Patented anti-fading technology: Hawk holds a patent on a solution to signal fading, the primary reliability limitation in distributed acoustic sensing
- Self-diagnostics: Onboard monitoring tracks unit condition and flags performance issues automatically
- Zero post-commissioning maintenance: No calibration or scheduled servicing required after installation
- 24/7 real-time monitoring: Continuous operation with no manual intervention needed
Fiber Optic Perimeter Security System Specifications
The Praetorian fiber optic sensing perimeter security product ships in a 4RU 19" rack enclosure (190 x 600 x 490mm) and operates on a 1- or 2-channel configuration, giving security teams flexibility in how they structure zone coverage. Key hardware specifications include:
- Sensing element: Fiber optic sensing cable
- Interrogator operating temperature: 0–40°C (32–104°F)
- Unit operating humidity (max): 10–85% @ 40°C, noncondensing
- Power supply: 110–240VAC (50–60Hz) or 24VDC
- Monitoring range: Up to 40km (25 miles) per channel
The fiber cable itself is a fully passive sensing element, meaning it requires no field power, carries no electrical current, and is immune to electromagnetic interference.
Dimensions & Specifications
- 4RU 19" Rack Enclosure (190x600x490mm)
- Sensing Element: Fiber Optic Sensing Cable
- Number of Channels: 1 or 2
- Interrogator Operating Temp: 0-40°C (32-104°F)
- Unit Operating Humidity (max): 10-85% @ 40°C Non-Condensing
- Power Supply: 110-240VAC (50-60Hz), 24VDC
Request Your Praetorian Trial Today
We ship fully configured trial systems to sites across the US and Australia, so you can evaluate real-world detection performance before committing to full deployment. Our technical team provides direct support throughout the trial period and will help you assess coverage range, mounting options, and integration requirements for your specific site.
Contact us today to request a quote for our fiber optic sensing perimeter security products or to learn more about other products we have to offer such as conveyor health monitoring systems, pipeline monitoring and leak detection, and power cable monitoring.
Frequently Asked Questions
Yes. The Praetorian system outputs alarm data and location coordinates that can feed into third-party security management platforms, including CCTV systems and PSIM software. Geo-tagged alerts pinpoint the exact intrusion location on a site map, allowing camera operators or access control systems to automatically respond to a specific zone rather than scanning the full perimeter.
The Praetorian uses standard single-mode fiber optic sensing cable as its sensing element. In many cases, existing fiber infrastructure on a site can be assessed for compatibility. Factors like cable condition, bend radius, splice count, and total fiber length all affect detection performance, so Hawk's engineering team evaluates the installed cable before confirming suitability.
The system uses preset detection thresholds that require a combination of vibration duration, dominant frequency, and relative intensity before classifying an event as an alarm. Wind, wildlife, rain, and general environmental vibration typically do not meet all three thresholds simultaneously, which keeps the false alarm rate very low. Site-specific threshold tuning during commissioning further tightens this filtering for local environmental conditions.
Start protecting your valuable assets with Hawk Fiber Optics.
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