The FBG fiber grating reflector is a wavelength selective reflector, which is usually installed at the front end of the ONU of the optical network to achieve accurate and fast detection of the end-to-end attenuation of the optical link. Compared with thin-film reflectors, fiber grating reflectors have the following characteristics:
The fiber grating reflector uses fiber grating to reflect nearly 100% of the test light pulse sent by the OTDR on the OLT side of the optical link terminal, and the wavelengths that do not meet the conditions pass through the fiber optic reflector normally with a small attenuation.
When the OTDR detects that the reflected detection signal exists, the optical fiber connection at the user end is normal. If the reflection value is very low or there is no reflection, it indicates that the fiber at the user end is damaged or broken. It can make online rapid detection of optical fiber lines without affecting the normal communication of other communication signals.
The fiber grating reflector uses the light sensitivity of the fiber material to write the fiber grating on the fiber core. The optical fiber goes through the ceramic ferrule and the grating area is partially encapsulated inside the ceramic ferrule. The fiber grating will not be affected during the insertion and removal of the fiber optic reflector and it will not be affected by dirt, so it has high reliability.
Fiber optic reflectors are available in SC type and LC type. They interact with regular adapters. It is very convenient to use them.
With the widespread implementation of fiber-to-the-home FTTH projects, the number of users involved in optical networks continues to increase. How to quickly and accurately detect optical network faults is particularly important for the maintenance of optical networks.
By installing the fiber optic reflector at the optical fiber connection end, the maintenance efficiency of the FTTH network is improved and the cost is lower. FBG fiber optic reflector is an ideal choice for optical fiber line monitoring and can be widely used in FTTX network, PON network, central computer room reflectivity test, communication system link detection, etc.