No matter which kind of termination in the way, all should implement of optical fiber in the. From the optical fiber end situation, the optical fiber cold can be divided into the following several pick up.
2.1 spherical surface cold way-succeeded
Sphere-cold approach refers to the sphere in the fiber connection point for grinding at both ends are sphere, docking need not join matching liquid in to make up the gap. In this way activities connector is used in great quantities, and for field cold meet first is the 1980 s.
Advantages: in the outstanding performance, climate sex strong resistance.
Weakness: the preparation of optical fiber demanding, need expensive site grinding machine supporting the use of complex in the process, the operation speed is slow, do not facilitate the construction use in FTTH mass.
Suitable for: optical fiber connectors, optical fiber cold activities by the son, and the optical fiber connectors in fast.
2.2 sphere-plane in cold way
Sphere-plane cold way is to point to in the fiber connection point end is for grinding the sphere, the other end is for the scene made of cutting plane, according to the structure of products when docking different, can match the liquid to make up for selective to join in the gap. It is at present the high quality product mainly USES the cold in the way.
Advantage: high climate function is admirable, don't join up in points can make up for the matching of the role of liquid, in process simple, reliable, the operation is fast, easy to use mass construction.
Weakness: the preparation of optical fiber demand is higher.
Suitable for: the scene in optical fiber connectors quickly.
2.3 plane-plane in cold way
Plane-plane cold way is to point to in the fiber connection point for both ends are made of cutting plane, connecting to join matching up when liquid in space, realize the light signal loss of low conduction. It is cold son mainly use the optical fiber by the way in the cold.
Advantages: product manufacturing cost; The optical fiber preparation easy; In the working procedure is simple, the operation speed, easy to use large quantities of FTTH construction.
Faults: point must join up make up for in the matching of the role of liquid, but matching liquid susceptible to pollution, the use environment of the demand is higher, and easier to use in the long run, resistance to climate performance is poor.
Suitable for: fiber cold meet the son, and fiber optic connectors in fast.
2.4 cant-in cold way cant
Cant-cant cold way is to point to in the fiber connection point for grinding or cut both ends are made of cant, you need to point to join in the liquid to make up the gap in the match. It is mainly used for return loss to demand higher CATV analog signal transmission, general use in the APC activities connector, use in the cold in technical field was just the beginning.
Advantages: return loss good performance.
Weakness: the preparation of optical fiber demanding, need expensive site grinding machine supporting the use of, or special inclined 8 degrees cutting knife to complete, in process complex, slow speed of operation, do not facilitate the construction use large quantities of FTTH.
Suitable for: APC fiber-optic activities connectors, optical fiber cold meet the son or live fast in the connector.
According to above analysis, generally speaking, we should realize the ball as possible grinding termination, second choice grinding sphere and termination of the plane, then choose plane and flat termination. Although cant and termination of the inclined plane can well avoid return loss, but the actual rarely used.