The so-called safety optical cable refers to the fire-retardant, fire-resistant, low-smoke, halogen-free, anti-mouse, waterproof and lightning-proof characteristics, and can meet the fireproof and fire-resistant two series of cable fireproof standards, in case of fire It can prevent the spread of fire, enable it to continue to transmit information, meet the information transmission needs of fire and broadcast systems, and be used in data centers for data backup in disaster environments. It can be widely used in tunnels, subways, banks, insurance companies, Important occasions such as large factories and network backbones. The indoor and outdoor application features enable the cable to be routed to a variety of cable platforms, in-wall conduits and vertical hoists, and can be terminated in fiber distribution frames.
For the society in which optical fiber transmits information, the optical cable cannot leave the field of view. The outdoor optical cable in the optical cable is mainly used for interconnection between buildings and between remote networks. The classification of optical cables has many aspects, due to the installation environment. It has stronger pressure resistance, corrosion resistance, greater tensile strength and a thicker protective layer than indoor cable, mostly armored. Outdoor fiber optic cables have single mode and multimode distribution.
What are the characteristics of single-mode outdoor cable?
The single-mode outdoor optical cable core is about 10μm, the propagation path is single, there is no dispersion, and the light source is mostly a laser or a laser diode, and the attenuation of the optical signal is much smaller than that of the multi-mode outdoor optical cable. For eksempel, the optical signal attenuation of the multimode outdoor cable may be 50% in the distance of 1000 meters, and the optical signal attenuation of the single mode outdoor cable in the same distance is only 6.25%.
What are the characteristics of multimode outdoor cable?
The multimode outdoor optical cable is named because it divides the propagation mode into multiple modes according to the working wavelength. The core diameter is 50um, and the light source is mostly L ED or VCSEL (vertical cavity surface emitting laser). Due to the diversity of its transmission paths, its transmission bandwidth is mainly dominated by modal dispersion compared to single-mode outdoor optical cables. Since the multimode outdoor optical cable core diameter is larger than that of the single mode outdoor optical cable and is easier to combine with LED and other light sources, it has advantages in many LANs. Derfor, multimode outdoor cables are often used in short-distance outdoor network connections.
Indlæggets dato: 2019-10-30