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RESEARCH & PRODUCT DEVELOPMENT

Fiber Optic Pressure Sensor Array

  • Full Scale: 15 PSIA
  • High Dynamic Range: 86 dB
  • Accuracy: 0.05% of FS
  • Miniature Size : 0.11 OD x 0.11 High
  • Inherent Self ID
  • Passive Sensor: No Power Consumption
  • Broad Bandwidth: DC to 10,000 Hz
  • RFI/EMI Immune
  • Optical Wavelengths: 1540, 1560, 1580, 1600 nm

The Fiber Optic Pressure Sensor Array consists of four optical sensors operating at a unique optical wavelength ranges and connected serially by a single optic fiber. A high intensity broadband light source excites all the sensors in the array. Each optical sensor, tuned to work at a unique range of the optical spectrum, shifts (modulates) its peak frequency proportional to the measured pressure and lets pass all other frequency signals. The light at the end of the fiber segment contains the information for all four sensors at different preset wavelength slots.

The extrinsic Fabry Perot MEMS optical pressure sensors are essentially flat, light weight, fully passive (no electrical power), and EMI/RFI immune, they exhibit superior performance regarding accuracy, dynamic range and noise. They are inherently self identifiable; the interrogation system knows what data belongs to what sensor.

FO Sensor Arrays are ideal for measuring air flow pressure at multiple points on the surface of aircrafts for Flight Load and wind tunnel test applications.





Fiber Optic Vector Sensor

  • Miniature Size
  • Network Array Configurable
  • Passive Sensor: No Power Consumption
  • Neutrally Buoyant
  • High Dynamic Range
  • Very Low Noise
  • Broad Frequency Bandwidth
  • Resistance to RFI/EMI
  • Hydrostatic Pressure: 2500 PSIG

The Fiber Optic Vector Sensor (FOVS) under development consist of a triaxial accelerometer and a hydrophone. The accelerometers provide the direction of the sound while the hydrophone measures its amplitude.

The FOVS is a passive sensor, neutrally buoyant, fully immune to EMI/RFI noise, and able to survive immerged pressures up to 2,500 PSI. Its design is conducive to form large arrays of vector sensors interconnected by a single common optic fiber. It allows the formation of more reliable and higher performance, thin-line towed sonar arrays capable of left/right bearing resolution and depression/elevation angle determination in littoral and deep water operations.

The optical accelerometers and pressure sensor are michromachined silicon Fabry Perot etalons serially interconnected through a common optic fiber, each of them operating at a different frequency band. The broadband light input is returned with all four sensor information in a wave division multiplexing (WDM) fashion. The fringe frequency peak (valley) variation (Δλ) is directly proportional to the measurand acceleration or pressure.

The excitation broad band light is modulated by each of the optical sensors at predefined wavelength bands.

VIP Sensors © 2007