A fiber optic reflector is a passive optical component that only allows specific wavelength bands to pass through. It utilizes a Fiber Bragg Grating to reflect specific selected wavelengths back, the reflected wavelengths are typically used for testing or diagnostics, while normally passing other communication bands that are not within the specific reflected wavelength range. It features with low insertion loss, high reflectivity, making it an idea components in the link monitoring of FTTx networks to identify potential issues like fiber breaks or excessive loss.

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