With the rapid development of limited television today, with the cable network to the cable network transition, and the cable prices gradually lower, high-power optical transmitter and high sensitivity optical receiver to promote the use of cable television network to gradually replace the cable cable The price and technical support, so FT-TC, FTTB have been promoted, and ultimately to achieve FTTB.

In order to achieve a flexible connection between different modules, devices and systems, there must be a device that can be detachably connected between the fiber and the optical fiber so that the optical signal can be transmitted on the desired channel to achieve and complete the intended or The purpose and requirements of the desired device to achieve this function is the Optical Fiber Connector, such as Optical Fiber Connector out of the fault, not only will cause the signal leakage, noise superposition, but also affect the normal transmission of the entire link.

Optical Fiber Connector Common Troubleshooting:

(1) Symptom: a line due to the municipal construction needs to temporarily interrupt the cable reconstruction, then to temporarily change the cable routing, between the two need to be a few sub-front detour connection, in order to quickly connected, the connection is the use of active connections Device, the link recovery and found a data business can not be restored.

Failure causes and exclusion: Link OTDR on the core were tested were normal, with the power meter in the receiving end to receive the signal is also normal. But after the connection but access to business, and further careful inspection and found that the OTDR band is wrong, switch to 1550nm wavelength, the re-measurement found that the Fresnel emission curve in two places have a strong launch loss, the distance should be in two A sub-machine room. Use the alcohol to clean the connector on the ODF frame, and the emitted wave disappears. The reason is due to the activities of the connector in the jump fiber does not pay attention to dust pollution caused.

(2) Symptom: a light node users to reflect the addition of 3 channel signal is very poor, there is interference.

Fault detection and cause analysis: the detection of optical receiver to receive optical power is normal, the optical receiver output RF signal is also normal. But in its monitoring mouth, with a monitor to see the addition of 3 channels have many clutter, the other channel normal, for a reception and failure still. To the front for all the way to send the light signal, the fault remains the same, indicating that the signal is not a problem. Replace the active connector on the fiber ODF frame and the fault is removed.

Careful observation of the activities of the joints, with the eyes can not see the problem, suspected to be caused by the quality of the connector, due to the accuracy is not high, the signal reflection caused by interference.

(3) Symptom: a light node users reflect the signal quality is poor, snow serious.

Failure causes and exclusion: This failure occurred after six months of maintenance, suspected due to improper maintenance caused. In the engine room on the launch and splitter and ODF frame on the corresponding contacts to check the normal, after the resumption of the user to reflect the signal is normal, but after a few days the user reflects the signal and worse. This time on the corresponding room of the active connector to carefully check and found a adapter within the ceramic core split, so that the active connector is not connected, the fiber is not allowed, resulting in increased signal loss. Replace the adapter after troubleshooting.

(4) Symptom: the entire district telecommunications signal snow serious.

Cause Find and Exclude: Check the optical receiver found inside the photodetector input fiber connector and the adapter is not connected. Take this activity with a medical cotton stained with anhydrous alcohol after cleaning, troubleshooting.

(5) Symptom: the receiver no optical signal or optical signal sometimes no time, when strong and weak.

Reason to find: In the initial determination of the normal light equipment, you should first check whether the Optical Fiber Connector is in good contact, and use alcohol swab swab the relevant activities of the connector, adapter and so on. As the fiber optic connection device in the operation prone to damage, pollution, etc., resulting in a higher failure rate. Damage to the connector under normal circumstances can be seen directly with the eyes, such as tail broken, poor contact with the active connector, adapter ceramic core damage, etc., or with the use of measuring instruments to further determine whether the existence of these devices problems.

With the continuous development of optical fiber communication technology, Optical Fiber Connectors in the optical fiber system will be more widely used, Optical Fiber Connectors and optical attenuators, optical isolators and other optical passive devices in optical fiber communication play an indispensable The important role