POF-based Drug Detection Fiber is a special optical fiber detection system that uses polymer optical fiber as a sensing medium. It achieves specific identification and detection of drug molecules through optical fiber surface modification or structural design. This sensing technology combines the flexibility of plastic optical fiber with detection principles such as surface plasmon resonance fluorescence quenching, and has the characteristics of rapid on-site detection, high sensitivity and strong concealment.
1. Materials and structures
Core material: polymethyl methacrylate or polycarbonate
Surface modification: nano-gold/silver coating, molecular imprinting polymer or antibody functionalization
Special structure: microfluidic integration, D-type polishing structure or Bragg grating
2. Detection principle
Surface enhanced Raman scattering: precious metal nanostructure enhances the fingerprint spectrum of drug molecules
Fluorescence sensing: drug molecules react specifically with fluorescent markers
Refractive index modulation: drug adsorption causes evanescent field changes
3. Performance parameters
Response time: <30 seconds
Multi-drug simultaneous detection: can identify more than 5 types of common drugs
Anti-interference: maintain >90% accuracy in human sweat/urine environment
Typical application scenarios
1. Public safety
Hidden security inspection system at airports/stations (integrated in baggage conveyor belts)
Prison contraband screening (implanted in cell walls)
2. Border control
Express package drug scanning (used with X-ray machines)
Hidden vehicle chassis detection (anti-electromagnetic interference)
3. Medical supervision
Real-time monitoring of drug addicts (integrated with wearable bracelets)
Drug composition analysis of sewage (long-term online monitoring)
