Zichen Qian

Unrepeatered remote Φ-OTDR system with single-ended amplifier using hollow-core leading fiber

Phase-sensitive Optical Time Domain Reflectometry (Φ-OTDR) is widely used for monitoring critical infrastructure. However, conventional Φ-OTDR systems are limited by fiber nonlinear effects, which restrict the probe pulse energy and thus limit the sensing distance. To overcome th...