RESEARCH & PRODUCT DEVELOPMENT

Fiber Optic Fabry-Pèrot MEMS Vector Sensor System

• Micro-miniature Size
• Light Weight
• Passive Sensors
• Network Capable
• Low Power Consumption
• High Sensitivity
• Accurate
• Resistance to RFI/EMI

The Fiber Optic Fabry-Perot MEMS Vector Sensor System functions via a broadband high intensity LED light source that is serially connected to the accelerometers. Each optical sensor is tuned to work at a unique frequency of the light spectrum. The sensors shift (modulate) the corresponding input signal frequency at a rate that is proportional to the measured pressure and let all other frequency signals pass. The light at the end of the optic fiber contains the data for all the sensors at different preset frequency slots, a scheme that is similar to Wave Division Multiplexing (WDM). An optical demultiplexer located at the fiber end separates the signal spectrum. A photodiode array converts the photons to electrons and the frequency shift corresponding to each sensor is then quantified by specialized circuitry.