光波导振荡场传感器

针对消逝场传感器的不足,提出了一种传感介质处于波导芯层,且以超高阶导模为探针的光波导振荡场传感器.由于其波导芯层处于功率密度极高的振荡场区域,而超高阶导模又具有对芯层参数极为灵敏的性质,因此这种新型传感器的灵敏度大大增强.实现了超越消逝场传感器灵敏度极限值几个量级的位移传感器.

Oscillating Wave Sensors of Optical Waveguide

An oscillating wave sensor based on the metal-cladding optical waveguide with sub-millimeterscale is proposed. Different from the surface plasmon resonance sensors and the waveguide mode sensors, in which the sample to be tested is located in the evanescent field region, the proposed sensor contains the sample in the core region which supports the oscillating field. Owing to the strong concentration of the electromagnetic field in the sensing medium, and the high sensitivity of the ultrahigh-order modes, the proposed sensor exhibits several orders of magnitude of sensitivity enhancement over the evanescent field sensors.