(1) engineering design, construction and maintenance work should be selected with the same characteristics of high-quality optical fiber on a line as far as possible to use the same batch of high-quality brand-name bare fiber, in order to match the characteristics of the fiber as far as possible, so that the mode field diameter of optical fiber splicing loss is reduced to a minimum.
(2) cable construction should be strictly in accordance with regulations and requirements
Try to do the whole disk configuration (single disk ≥ 500 m) to minimize the number of joints. Laying strictly according to the cable tray number and end of the order of laying, so that the loss of value to reach the minimum.
(3) Select experienced and well-trained splicing personnel for splicing and testing
Splicing personnel level directly affects the size of the splice loss, splicing personnel should be strictly in accordance with the fiber optic fusion splicing process for splicing, strict control of connector loss, fusion splicing process at all times using an optical domain reflectometer (OTDR) to monitor (splice loss ≤ 0.08dB / a), does not meet the requirements of the fusion should be re-splice. When using optical time domain reflectometer (OTDR), the loss of the joint should be measured from two directions, and the average of these two results, to eliminate the human factor error of unidirectional OTDR measurement.
(4) Ensure that the connection environment meets the requirements
Ensure that the fusion splicing process takes place in a controlled environment, free of dust, moisture and other contaminants. Environmental factors can affect the quality of the splice and introduce additional losses. Fiber optic cable splicing parts and tools, materials should be kept clean, shall not allow the fiber optic connector to be exposed to moisture, ready to cut the optical fiber must be clean, no dirt. After cutting the fiber shall not be exposed in the air for too long, especially in the dusty and humid environment. When the temperature of the connection environment is too low, the necessary warming measures should be taken.
(5) Preparation of perfect fiber optic end face
The preparation of fiber optic endface is the most critical process of fiber optic splicing. This includes stripping the protective coating, cleaning the fiber end to remove any contaminants. Fiber optic endface is perfect or not is one of the important reasons to determine the fiber optic splice loss. High-quality endface should be flat, no burrs, no defects, and perpendicular to the axis, the fiber optic endface axis inclination should be less than 0.3 degrees, presenting a smooth and flat mirror, and keep clean to avoid dust pollution. Should choose a high-quality cutting knife, and the correct use of cutting knife cutting fiber. The cleaning, cutting and fusion splicing of the bare fiber should be closely spliced and not spaced too far apart. Move the optical fiber should be held lightly to prevent damage to the fiber end face by rubbing with other objects.
(6) the correct use of fusion splicer
Fusion splicers are usually used for permanent splicing of optical fibers. Make sure you use a well-maintained and calibrated high-quality fusion splicer. Should be strictly in accordance with the operating instructions and operating procedures of the fusion splicer, the correct operation of the fusion splicer, the correct use of the fusion splicer is to reduce the fiber optic splicing loss is an important guarantee and a key link.
(7) Try to use high-quality qualified activity connector, to ensure that the connector performance indicators in line with the relevant provisions of the activity of the connector insertion loss should be controlled below 0.3 dB / a (or even lower), the additional loss of not more than 0.2 dB / a
(8) Activity connectors should be connected to good, tight coupling to prevent light leakage phenomenon
(9) to ensure that the activity of the connector is clean
Construction, maintenance should pay attention to cleaning plugs and adapters and ensure that the machine room and equipment environment is clean, prevent plugs and adapters have dirt and dust, minimize scattering loss.
