How is optical power adjusted when a signal is too strong and saturates the interrogator?
When the optical signal power is too strong and saturates the interrogator, an optical attenuator is used to reduce the optical power to an acceptable level.
An optical attenuator is a passive device that reduces the intensity of an optical signal without significantly distorting the signal itself. It is typically inserted between the fiber optic sensor network and the interrogator. By reducing the signal strength, the attenuator prevents the interrogator’s photodetector from being overdriven or saturated, ensuring that the device can accurately detect and process the reflected Bragg wavelengths from the Fiber Bragg Grating (FBG) sensors. This is crucial for obtaining precise and reliable measurement data.
OFSCN® Fiber Bragg Grating Interrogators are designed for high-precision FBG measurements, and managing the input optical power correctly is essential for their optimal performance.
Here is a standard image of our interrogator:
You can find more details about our interrogators here:
OFSCN® Fiber Bragg Grating Interrogator
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