Under long-term stress, will the wavelength undergo irreversible drift?
Under long-term stress, an FBG’s wavelength can indeed experience drift due to the creep effect, particularly if the sensor relies on polymer adhesives for encapsulation or bonding. This creep in the adhesive material can cause a gradual, irreversible change in the strain transferred to the FBG, leading to wavelength instability over time.
To address this, OFSCN offers the OFSCN® Alloy Tube Packaged Fiber Bragg Grating Strain Sensor. This sensor is designed with an all-metal, seamless tube encapsulation, which effectively eliminates the creep problems associated with glues. This makes it highly suitable for long-term, high-temperature applications where stable and accurate strain measurements are critical.
Here are some standard images of the product:
You can find more detailed technical parameters on our website:
https://www.ofscn.net/fbg-products/strain-sensor.html
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