In fiber optic systems, fiber optic consumables are an integral part of optical transmission equipment and optical components. Optical device dust caps, fiber ferrules/envelopes, fiber splice protection sleeves, fiber optic cleaning consumable tool kits, etc. are all fiber optic consumables. These consumables are widely used in fiber optic systems to protect the fiber and fiber end faces. Among all consumables, the optical device dust cap is applied to almost every corner of the fiber system, so its role should not be underestimated. So, what is the role of the dust cap of the optical device? How does it affect the fiber system? Today, Xiaobian takes you out of the true face of the dust cap of the optical device.
What role does the dust cap play in the fiber optic system?
The dust cap plays an important role in the fiber optic system. It protects the fiber connector, the fiber adapter, the optical interface of the optical module, and the ports of other devices from external environmental pollution and external damage, preventing the network from decelerating or causing network failure. In short, dust caps should be used on any fiber optic connector or optical interface that is not commonly used.
Several common dust caps
As mentioned above, dust caps are required on almost all ports of a fiber optic system to prevent the port from being contaminated or damaged when not in use. Among them, fiber optic adapters, fiber optic connectors, and optical modules are common optical devices that require dust caps in fiber optic systems. The dust caps of these optical devices are called adapter dust caps, connector dust caps, and optical module dust plugs:
Adapter dust cap - protects fiber optic adapters and couplers
SC adapter dust cap
Connector dust cap - a sleeve that protects the jumper connector or connector
SC connector dust cap
Optical module dust plug—also called the port dust cover. It is usually used in the optical interface of an unused optical module.
SFP optical module dust plug
According to the material, the dust cap can be divided into a plastic dust cap and a metal dust cap. Plastic dust caps are much cheaper than metal dust caps, not only because metal dust caps use metal parts that are more expensive than plastic, but also because they must be protected against electromagnetic interference. In addition, most metal dust caps are equipped with a chain metal dust cap. The metal chain on the metal dust cap ensures that the dust cap will not fall or be lost after being separated from the device.
ST chain metal dust cap
Depending on the application, the adapter dust cap and connector dust cap are divided into LC dust cap, SC dust cap, ST dust cap, FC dust cap, and so on.
What effect does the dust cap have on the fiber system?
The dust cap is a must-have accessory for fiber optic connectors, fiber optic adapters, and unused optical modules. Its role in the storage and transportation of fiber optic connectors, fiber optic adapters, and optical modules is significant to avoid mechanical damage to these optical components. When the optical device is not in use, the dust cap is also dust-proof to some extent. However, this does not mean that the dust cap can completely avoid the contamination of the optical device. On the contrary, the dust cap may also be an optical fiber. One of the sources of system pollution. The air is filled with dust everywhere, and the inside of the dust cap is no exception. Therefore, when the dust cap is in contact with the end surface of the optical device, it will inevitably cause different degrees of contamination on the end surface. In addition, grease, gel or other contaminants used in processing are often left inside some inferior dust caps. For these reasons, some people think that using the word "dust cap" is a bit of a misnomer.
Unfortunately, most users are not aware of this. They believe that the dust cap can keep the end face of the optical device clean and not pollute. Therefore, when they use the optical device, they usually use the optical device directly in the fiber system after removing the dust cap without any cleaning. Step, however, this operation causes additional loss in the optical interface. When you find that your fiber optic system is not performing at its best, you should recall whether you have properly cleaned your optical device, and the small details can cause significant problems.
Conclusion
Dust caps play a pivotal role in fiber optic systems. Some pre-assembled optical devices are usually equipped with a dust cap, and you can also purchase a variety of dust caps on the market. The dust cap is a good solution to prevent mechanical damage to the optical device, while also preventing external dust and other contaminants from directly entering the interface of the optical device. However, it is not a 100% optical device umbrella, and in some cases, the dust cap may also be a source of contamination. Therefore, proper inspection and cleaning of the end faces of optical devices is a magic weapon to ensure the performance and longevity of fiber optic systems.
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