As we all know, when installing fiber optic patch cord, we should pay attention to the bending range of the cable not being greater than its bending radius, otherwise light leakage will occur and cause loss. As shown in the figure below, the greater the bending range, the greater the loss of optical signals. How to solve the high-density cabling problem in the data center? Bend insensitive fiber patch cable is an ideal solution for high-density wiring. It has excellent bending resistance and has the same mechanical and optical properties as ordinary fiber patch cable.
What is the Bend Radius?
The bending radius refers to the maximum bending degree when the optical cable can maintain its normal working performance. The smaller the bending radius, the better the bending resistance of the optical cable. Normally, the static bending radius of the optical cable is 10 times the outer diameter of the optical cable, and the dynamic bending radius is 20 times the outer diameter of the optical cable. The bending radius of ordinary optical fiber patch cords on the market is generally 30mm, and the bending radius of bend-insensitive fiber patch cable is much smaller, only a few millimeters. There are two types of bend-insensitive fiber patch cable: bend-insensitive single-mode fiber patch cable and bend-insensitive multimode fiber patch cable.
Bend Insensitive Single-mode Fiber Patch Cable
The bend-insensitive single-mode fiber patch cable has greatly improved its bending performance through optimized design. The ITU standard G.657 now specifies two different bend-insensitive single-mode fiber patch cords: G.657 A and G.657 B. These two fiber optic patch cables can be further subdivided into G.657.A1, G.657.A2, G.657.B1 and G.657.B2. The minimum bending radius of G.657.A1 fiber patch cable is 10mm, the minimum bending radius of G.657.A2 and G.657.B1 fiber patch cable is 7.5mm, and the minimum bending radius of G.657.B2 fiber patch cable can reach 5mm.
Compared with the G652 fiber patch cable, the G.657 single-mode bend-insensitive fiber patch cable is more flexible in application, can realize various installation forms, and is widely used in today’s data centers.
Bend Insensitive Multimode Fiber Patch Cable
The minimum bending radius of the bend-insensitive multimode fiber patch cord is 7.5mm. There is a special optical “groove” design between its core and cladding. Compared with traditional multimode fiber patch cords, these grooves retain more light.
It is worth mentioning that the bend insensitive multimode fiber patch cable was originally designed to meet the needs of FTTH applications. Now, the bend insensitive multimode fiber patch cable is also increasingly used in high-density wiring areas of data centers.
With the popularity of more and more high-density applications, bend-insensitive fiber patch cables are playing an increasingly important role. Bonelinks offers a wide range of bend-insensitive multimode fiber patch cables (OM2/OM3/OM4) and bend-insensitive single-mode fiber patch cables (OS2). The cable also has the same mechanical and optical properties as ordinary fiber optic patch cords. Our products have passed the factory test, the quality is guaranteed, and the outer sheath material, patch cord length, connector, color, etc. all can be customized.