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There are two main types of optical fibers.
Published:
2023-05-31
There are two main types of optical fibers: Single-mode Fiber: Generally, fiber jumpers are shown in yellow, and connectors and protective sleeves are shown in blue. The transmission distance is long. Multi-mode Fiber: Generally, fiber jumpers are shown in orange, and some are shown in gray. Connectors and protective covers are shown in beige or black. The transmission distance is shorter.
There are two main types of optical fibers:
Single-mode Fiber: Generally, fiber jumpers are shown in yellow, and connectors and protective sleeves are shown in blue. The transmission distance is long.
Multi-mode Fiber: Generally, fiber jumpers are shown in orange, and some are shown in gray. Connectors and protective covers are shown in beige or black. The transmission distance is shorter.
Pay attention to optical fiber use!
The optical transceivers at both ends of the fiber jumper must have the same wavelength. That is, the optical transceivers at both ends of the fiber must have the same wavelength. The simple way to distinguish the optical transceivers is to have the same color. R> Generally, multi-mode optical fibers (orange optical fibers) are used for short-wave optical modules and single-mode optical fibers (yellow optical fibers) are used for long-wave optical modules to ensure the accuracy of data transmission.
Do not bend or loop the fiber excessively in use, which will increase the attenuation of light during transmission.
After optical fiber jumpers are used, protect the optical fiber connectors with protective sleeves. Dust and oil will damage the coupling of optical fibers.
Optical fiber coupler
Optical Coupler, also known as Splitter, is a component that divides optical signals from one optical fiber to several optical fibers. It belongs to the field of optical passive components and is used in telecommunications networks, cable TV networks, subscriber loop systems and Lans. The largest passive component, along with fiber optic connectors (the market for both was about $2.5 billion in 2003, according to ElectroniCat). Fiber couplers can be divided into standard couplers (double branch, unit 1×2, also divide the optical signal into two powers), star/tree couplers, and wavelength multiplexers (WDM, if the wavelength is high density, that is, narrow wavelength spacing, it belongs to DWDM). There are three manufacturing methods: Fuse, Micro Optics and Wave Guide, and sintering method accounts for the majority (about 90%). The production method of sintering method is to melt and stretch two optical fibers together, so that the core polymerization together, in order to achieve the optical coupling effect, and the most important production equipment is the melting and firing machine, which is also an important step, although the important step part can be made by the machine, but after sintering, still need to work detection and packaging, so the labor cost accounts for about 10 ~ 15%, Moreover, the consistency of quality must be ensured by manual inspection package, which must be overcome in mass production. However, the technical difficulties are not as high as DWDM module and optical active component. Therefore, most manufacturers who want to enter the optical fiber industry at the early stage will cut in from the optical coupler, and the gross profit is 20 ~ 30%.
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