Precautions and selection guide for the use of fiber optic patch cords

Optical fiber jumper is used to make jumper wiring from the equipment to the optical fiber wiring link, with a thick protective layer, generally used in the connection
between the optical transceiver and the terminal box.

The transmission and reception wavelength of the optical module at both ends of the optical fiber patch cord must be consistent, that is to say, the two ends of the optical fiber must be the same wavelength optical module, and the simple way to distinguish is that the color of the optical module should be consistent
.
In general, shortwave optical modules use multimode optical fiber (orange optical fiber), and long-wave optical modules use single-mode optical fiber (yellow fiber) to ensure the accuracy of
data transmission.

Before the use of the optical fiber jumper, the ceramic ferrule and the end face of the ferrule must be wiped clean with alcohol and skim cotton; When used, the minimum bending radius of optical fiber is not less than 150mm; Protect the ferrule and the end face of the ferrule to prevent bruising and pollution, and bring the dust cap in time after disassembly; Do not look directly at the end face of the fiber during laser signal transmission; When man-made and other force majeure damage occurs, the damaged optical fiber jumper should be replaced in time; Before installation, the manual should be carefully read, and the installation and debugging should be carried out under the guidance of the engineer of the manufacturer or dealer; If there is an abnormal situation in the fiber network or system, it can be tested
one by one using the troubleshooting method.
When testing or troubleshooting jumpers, on-off tests can be done first, and a visible laser pointer can usually be used to light the entire fiber link
.
Or further use the precision optical fiber insertion loss return loss meter to test its indicators, the indicators are within the qualified range, the jumper indicates normal, otherwise it is unqualified
.
After the optical fiber patch cord is used, the optical fiber connector must be protected with a protective sleeve, dust and oil will damage the coupling
of the optical fiber.

There are three main types of optical fiber patch cords according to the type of termination: ST-ST, SC-SC, ST-SC
.
According to the type of optical fiber, there are mainly two types
: single-mode fiber and multimode fiber.
Jumper lengths are available in sizes of 0.
5m, 1m, 2m, 3m, 5m, 10m, etc
.
According to the outer sheath material of the cable, it can be divided into ordinary type, ordinary flame retardant type, low-smoke halogen-free type (LZSH), low-smoke halogen-free flame retardant type, etc
.
According to the fire rating of the building and the fire resistance requirements of the material, the integrated wiring system should take corresponding measures
.
Cables or optical cables should be deployed in flammable areas and building shafts, and flame-retardant cables and optical cables should be used; In large public places, flame retardant, low-smoke, low-toxicity cables or optical cables should be used; Flame-retardant wiring equipment should be used between adjacent equipment
or handover rooms.