Fabry-Pérot Sensor
Product description
Fabry-Pérot sensors provide high-precision strain measurements based on interferometric cavity elongation. For harsh environments, IDIL offers ruggedized versions — developed in collaboration with the CEA — using hermetically sealed fibers in welded protective tubes. They can be manufactured using both single-mode (SM) and multimode (MM) optical fibers.
- Different fibers, glue, packaging on demand
- Designed for extreme environments: high temperature, high radiation, waterproof
- Hermetically welded/glued tubes (sensor length up to 1m)
- Increased sensitivity to small elongations
- Multiplexing capability (up to 8 optical channels, 1 Fabry-Pérot sensor per channel)
- Available sensor lengths: 50cm / 1m (other lengths on demand)
- Developed and transferred by the CEA to IDIL
HOW DO FP SENSORS WORK?
A Fabry-Pérot sensor is an intrinsic fiber optic sensor. The optical fiber serves solely as a light transmission medium and does not constitute the sensing element itself. Our Fabry-Pérot sensor operates by analyzing the Free Spectral Range (FSR), i.e. the reflected light between the fiber end and a small mirror in the Fabry-Pérot cavity. Variations in this distance due to applied strain cause shifts in the reflection peak wavelength, enabling highly precise strain measurements. They are used in environmental monitoring, manufacturing process testing, materials testing, nuclear, oil, gas industries and aerospace applications.
SPECIFICATION
| Fabry-Pérot Sensor | |
| Optical fiber | SM, MM (custom options available) |
| Environmental resistance | High temperature (up to 800°C), high radiation, waterproof |
| Optical fiber length | From 1m to 40m |
| Total sensor length (front + rear) | 50cm, 1m (custom lengths available) |
| Pigtail | SMF, Acrylate coating, 900µm Hytrel buffer, FC/APC connector, 2m |
UP TO 8 CHANNELS
Due to their design, multiple Fabry-Pérot sensors of this type cannot be deployed within a single optical fiber. However, IDIL provides a complete multiplexing interrogation unit capable of monitoring up to 8 optical channels, with one Fabry-Pérot sensor per channel.
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