标签归档:single-mode fiber

Tips on Buying Fiber Optic Cables

Buying fiber optic cables has been a daily thing in our life. Since the field of fiber optic network is still unfamiliar to most people, not to say the detailed information about the fiber optic cable. In this article, we are going to provide some tips for you to buy fiber optic cables. Before that, let’s go over the background information of the fiber optic cable for your better understanding.

What Is the Fiber Optic Cable

The fiber optic cable refers to a kind of telecommunication cable, containing one or more glass or plastic made optic fibers, usually slightly wider than a human hair. It can carry light to transmit data. Designed for long distance transmission from hundreds of miles to thousands of miles, the fiber optic cable is an ideal choice for networking, telecommunications and storage applications in wiring closets, distribution frames, gateways, central offices and data centers.

Types of Fiber Optic Cables

According to different standards or features, there are different types of fiber optic cables. Basically, based on different transmission modes, the fiber optic cable can be grouped into two types: single mode fiber and multimode fiber.

Single Mode Fiber

The fiber optic cable for this type is a single strand of glass fiber with a diameter of 8.3 to 10 microns, which is narrower than the multimode fiber. Under such a condition, the beam of light is transmitted in a much tighter space with a higher transmission rate. Therefore, it makes the long-distance communication, sometimes as far as between continents more available.

Figure 1: Single Mode Bend Insensitive Fiber Optic Cable

Figure 1: Single Mode Bend Insensitive Fiber Optic Cable

Multimode Fiber

Compared with single mode fibers, the multimode fiber has a larger diameter (62.5µm or 50µm), allowing more space to generate and collect light. Considering about multimode fibers’ transmission performance, it is mostly used for communications over short distances no longer than 2000 m, such as within a building or in a small campus.

 Figure 2: OM1 Multimode Fiber Optic Cable

Figure 2: OM1 Multimode Fiber Optic Cable

Tips on Buying Fiber Optic Cables

After an overview of fiber optic cables, it’s time for us to learn how to buy fiber optic cables. There are some major steps offered to follow with.

Firstly, preparation. For anyone buying fiber optic cables, they need to have a full preparation. On the one hand, you need to know your network environment, such as the required transmission speed, distance etc. On the other hand, you need to have a basic understanding of the features of all kinds of optic cables. As we mentioned above, there are many types of fiber optic cables available in the market not only just based on different transmission modes, for example, according to different connectors, there are LC fiber, SC fiber, etc. Therefore, you need to know which type suits your network environment.

Next, you need to have a budget for buying optic cables in your mind. There are so many fiber optic cable suppliers in the online market, almost every supplier will offer a different fiber optic cable price. After that, you can begin your online searching. When you browse the product, you can make a comparison of the fiber optic cable price per meter among different suppliers. Besides, you have to check the suppliers’ reputation making sure their service and products are reliable.

Last, but not least. Some buyers buying fiber optic cables for their company need to consider more carefully for their complicate requirements. You had better buy your cables from suppliers who are also manufacturers, such as FS.COM, one of the top fiber optic cable manufacturers. Their service will be more mature, reliable and professional, especially for their after-sale service.

Conclusion

Buying fiber optic cable is not so difficult as you have thought. After reading this article, we believe things will be different for you.

Fiber Optic Cable Core-How Much Do You Know About It?

For anyone who wants to know fiber optic cable core, it’s a must to know the structure of a fiber optic cable. For a fiber optic cable, it consists of three basic parts: the core, the fiber optic cable core cladding, and the coating layer outside the cladding.

What Is Fiber Optic Cable Core?

A conventional fiber optic cable core is a glass or plastic made cylinder running along the fiber’s length. This part is designed for light transmission. Therefore, the larger the core, the more light that will be transmitted into the fiber. As we mentioned before, the core is surrounded by the cladding layer to provide a lower fiber optic cable core index of refraction. So more light can be transmitted into the fiber.

The structure of the fiber optic cable

Figure 1: the structure of the fiber optic cable

Fiber Optic Cable Core Types

According to different standards or features, the fiber optic cable can be grouped into different types. For example, classified by connectors, we can get LC fiber, SC fiber, etc; classified by transmission mode, we can get multimode fiber and single mode fiber. Likewise, with different features, the fiber optic cable core can also be divided into different types.

Fiber Optic Cable Core Material

According to the material, plastic and glass cores can be found. When the core is made from pure glass, the cladding is from the less pure glass. Glass type has the lowest attenuation over long distances but comes at the highest cost. As for the plastic core type, it is not as clear as glass one but is more flexible and easier to handle. Moreover, the plastic type is more affordable for us.

Fiber Optic Cable Core Size

Based on sizes, the fiber optic core can be grouped into quite a lot of types. Basically, the most common core sizes are 9 µm in diameter (single mode), 50 µm in diameter (multimode), 62.5 µm in diameter (multimode). For your better understanding, please look at Figure 2 as below. It’s a comparison of the three common sizes when they are inside the same cladding layer diameters (125 µm).

A comparison of optical fiber core diameters

Figure 2: A comparison of optical fiber core diameters

Fiber Optic Cable Core Numbers

Featured by how many cores in fiber optic cables, two kinds of cable cores can be arranged: the single core and the multicore. The single core type refers to the fiber cable that consists of a core and a cladding layer, which is the most common type in the market. However, the multicore fiber optic cable means that in the same cladding layer, there are more than one core in it. The commonly used cables are four, six, eight, twelve, twenty-four cores.

Multicore Fiber Cable

Figure 3: Multicore fiber cable

Conclusion

Based on the knowledge about fiber optic cables, we have a basic idea about its structure and functions each part has played, especially the fiber optic cable core. After knowing what the core is, we also introduce the types of the fiber optic core. Classified by different features, such as core material and size, we can get different types. Hoping after this article, you will have a much clearer vision about the fiber optic core.

Single Mode Fiber Distance

Fiber optic cable is the essential media in telecommunication system for transmitting information. According to different categories, while depending on fiber connectors, patch cable can be considered as LC fiber, FC fiber, SC fiber, ST fiber and so on, it is well known that fiber optic cable can be divided into single mode fiber and multimode fiber based on transmission paths. Today, we will learn more about the single mode fiber distance.

Single Mode Fiber Overview

Single mode fiber derives its name from the fact that it only allows one mode of light to pass through their core at a time. Commonly, single mode fiber is designed with a narrow core diameter of 8 to 10 micrometers, which is much smaller than multimode fiber of 50 or 62.5 micrometers.

Before we continue, we need to be clear that due to different mode of propagation, there is modal dispersion during the signal spreading. And transmission distance is greatly influenced by the dispersion. Luckily, because of the allowance of just one mode of light, single mode fiber have the ability to transmitting data for miles without losing too much data. Thus it can readily carry information for a longer distance than the light used in the multimode fiber.

single mode fiber

OS1 vs OS2

OS1 and OS2 are the two types of single mode fiber, here the term OS refers to optical single mode fiber. Both of them are suitable for Gigabit applications and have the same jacket color.

OS1 cable is indoor tight buffered fiber that is compliant with ITU-T G.652A or ITU-T G.652B standards. The attenuation of this type is 1dB per kilometer with a top transmission distance of 2 km at 10 Gigabit Ethernet. It works between 1310 nm and 1550 nm.

OS2 cable is outdoor loose tube fiber optic cable that comply with ITU-T G.652C and ITU-T G.652D specifications. It has an attenuation of 0.4 dB between 1310 nm and 1550 nm, with a maximum transmission distance of 10 km at 10Gigabit Ethernet.

Selection on Different Distances

Single mode fiber provides a greater transmission distance. When choosing the right fiber cable, the most crucial thing that must be taken into consideration is how far the cable could support. In addition, the transmission distance is also related to the optics that users apply in the equipment.

Technology Bandwidth Wavelength Distance
1000BASE-LX 1000Mbps 1310nm 10km
10GBASE-LR 10Gbps 1310nm 10km
40GBASE-ER4 40Gbps 1310nm 40km
40GBASE-LR4 40Gbps 1310nm 10km

According to the above form, we can clearly see that transmission distance varies greatly. At different transmission rate, the distance changes. Distance of single mode fiber can reach 40km at the speed of 40gigabit Ethernet, and it will be 10km with the speed of 10gigabit Ethernet. Thus, try to buy fiber cable of suitable length for your project based on your network speed and some other actual situations. Thus, try to buy fiber cable of suitable length for your project based on your network speed and some other actual situations.

Conclusion

Transmission distance of single mode fiber is an important factor when people set up a network especially in data center that requires data to deliver over long distances. FS.COM provides a number set of OS1 fiber, OS2 fiber, LC fiber, SC fiber and so on. The products have passed many quality system verification such as CE, FCC. Come and choose your favored cables at FS.COM.

How to Select the Basic Materials of the LAN

Installing or designing network may pose a challenge as there are multiple optical solutions that meet the same specification or requirement. But by understanding the basic optical components and the specific performance requirements, you will be able to generate a cost-efficient bill of materials for your project. Thus before picking any products for your infrastructure, you must read this article.

Fiber Type
There are two basic fiber types: single-mode and multi-mode. Multi-mode fiber is graded by OM (optical multi-mode), the higher the OM grade, the better bandwidth performance you can expect. And it comes in both 50μm and 62.5μm core sizes with 50 μm multi-mode available in both standard (OM2) as well as a laser-optimized version (OM3/OM4). Single-mode are graded by OS (optical single-mode) and can run at OS1 and OS2, as described in TIA-568 C.3. Keep the consistency within your network is critical for long-term performance, therefore you shouldn’t mix new fiber type or performance with your old plant.

single-mode vs.multi-mode fiber transceiver

In addition, the cost of the components should be considered. The transceiver associated with single-mode fiber are more expensive than those for multi-mode. For example, the price of JG661A (compatible HP 40GBASE-LR4/OTU-3 QSFP+ transceiver) is much higher than JG325B (compatible HP 40GBASE-SR4 QSFP+ transceiver). The decision must be made to balance the performance and the cost. Single-mode system will provide for future expansion, yet multi-mode fiber is only for today and the near future. To sum up, single-mode fiber operate better at long reach while multi-mode fiber is ideal for short reach, choosing single-mode or multi-mode depends on your networks needs.

Termination Method
Deciding on a termination methods is typical affected by many factors. If your biggest concern is time, no epoxy/no polish connectors are probably your best choice. The fiber end faces are factory polished and easily installed with a tool kit. This types of termination method allows you to perform terminations quickly, but the cost is usually higher than that of epoxy and polish connector.

If your biggest concern is cost. epoxy and polish connectors might be a good fit because of their low initial price. This type of termination need considerable time to learn how to properly hand-polish connectors that meet specification, and it requires a large workspace to lay out the polishing papers, polishing pucks, epoxy, etc. If your work environment or network condition is not allowed, it is advisable not to select this method.

Fusion Splicer or Optical Connector
Keep in mind that whether to choose fusion splicing or a connector for your network will always need an experienced installer under adequate training. Fusion splicer, as we all know, is very expensive. If your company do not own one, it can be a large investment to make and you need to order the correct splice tray for your hardware and heart-shrinks to keep your splices intact. But if you already have a fusion splicer, fusion-spliced pigtails might be the right choice for you that can provide high quality results and easy to use in areas. The following picture shows a Fujikura FSM-80S Core Alignment Fusion Splicer.

Fujikura FSM-80S Core Alignment Fusion Splicer

Specifications, density, electronics interfaces and existing plant often drive connector choices. LC connector is favored for its maximum density and room-saving. It is also available in duplex from, which allows you to manage polarity by simply reversing the connector via a duplex clip. SC connectors feature an easy push/pull locking mechanism and are available in simplex and duplex forms. ST compatible connectors have a spring-loaded bayonet locking system that helps them stay in place but are only available in simplex versions.

Hardware
To determine the type of hardware you need, take into consideration the space that will be utilized for the network. If you are installing inside of a closet or other cramped quarters and need low density, wall mountable hardware is the best selection as it does not take up a lot of room. If racks are already in place, or if there is enough room to install them, rack-mount hardware is the best selection because it is sturdy and easy to access.

Rack-mount housing

Additional Information
Designing a network may be a big project as you should take a lot of things into consideration. To make sure the high performance of you network, please think about all the aspects that I have written in this text. What’s more, there are three basic categories for cable: indoor, outdoor and indoor/outdoor. The types of cables you have to choose for your infrastructure depend on where the cables will be run. Fiberstore supplies a whole variety of optical equipment including fiber optical cables, optical transceivers, fusion splicer and optical connectors. Come to us to help your data transmission initiatives for future proof.

Basic Information About Fiber Optic Transceiver

Optical fiber transceivers are also called fiber optic transmitter and receiver, which are used to send and receive optical information in a variety of different applications. The role of the optical module is photoelectric conversion. These optical modules are scalable and flexible in their use, and this is why they are preferred by designers. Here is what you need to know about the basics of fiber optic transceivers.

Fiber Optic Transmitters and Receivers
Fiber optic transmission system consists of a transmitter on one end of a fiber and a receiver on the other end. The transmitter end takes in and converts the electrical signal into light, after the optical fiber transmission in the fiber cable plant, the receiver end again converts the light signal into electrical signal. Both the receiver and the transmitter ends have their own circuitry and can handle transmissions in both directions. Fiber optic cables can both send and receive information. The cables can be made of different fibers, and the information can be transmitted at different times. The following picture shows a fiber optic datalink.

fiber optic datalink

Sources of Fiber Optic Transceiver
There are four types of fiber transmitters used to convert electrical signals into optical signals. These sources of fiber optic transmitters include: distributed feedback (DFB) lasers, fabry-perot (FP) lasers, LEDs, and vertical cavity surface-emitting lasers (VCSELs). They are all semiconductor chips. Take QSFP-40G-UNIV as an example, it is Arista QSFP-40G-UNIV compatible 40G QSFP+ transceiver. It uses DFB lasers as sources for fiber optic transmitters, which are used in long distance and DWDM systems. DFB lasers have the narrowest spectral width which minimizes chromatic dispersion on the longest links.

Arista QSFP-40G-UNIV

The choice of the devices is determined mainly by speed and fiber compatibility issues. As many premises systems using multi-mode fiber have exceeded bit rates of 1 Gb/s, lasers (mostly VCSELs) have replaced LEDs. Fiber optic transceivers are reliable, but they may malfunction or become out-dated. If an upgrade is necessary, there are hot-swappable fiber optic transceivers. These devices make it easy to replace or repair without powering down the device.

How Fiber Optic Transceiver Works?
Information is sent in the form of pulses of the light in the fiber optics. The light pulses have to be converted into electrical ones in order to be utilized by an electronic device. Thanks to the conversion by fiber optic transceivers: In its fiber optic data links, the transmitter converts an electrical signal into an optical signal, which is coupled with a connector and transmitted through a fiber optic cable. The light from the end of the cable is coupled to a receiver, where a detector converts the light back into an electrical signal. Either a light emitting diode (LED) or a laser diode is used as the light source.

Packaging
Optical fiber transceivers are usually packaged in industry standard packages like SFP, SFP+, XFP, X2, Xenpak, GBIC. According to the fiber type it connects to, there are MM (multi-mode), SM (Single-mode), as well as WDM fiber (CWDM, DWDM modules). The SFP modules support up to 4.25 Gbps with a connector on the optical end and a standard electrical interface on the other end. The QSFP are for 40 Gigabit networks using a LC duplex connection. Take compatible Brocade 40G-QSFP-LR4 as an example, it supports link lengths of 10km on single-mode fiber cable at a wavelength of 1310nm.

Summary
Keep in mind that fiber optic transceiver has two ends. One has an optical cable plug and another for connecting an electrical device. Each aspect of the transceivers is necessary to properly deliver a signal to its destination. Be aware of all aspects of fiber optic transceivers to purchase what you need for your application. Fiberstore supplies a wide variety of 40GBASE QSFP+ transceiver modules for you to choose from. More detailed, please contact us directly.

Where can I buy LC LC Fiber Cable —— Fiberstore

LC-LC fiber patch cable information:

LC part of the fiber optic cable is the compact small form factor LC connector. It feature the RJ-45 style interface with low insertion loss and low back reflection, it is with high precision alignment and is widely used all over the world. We supply both simplex LC cable and duplex LC cable. The connector is with a 1.25mm O.D zirconia ceramic ferrule; LC fiber cable can be 9/125 single mode or 50/125 multimode or 62.5/125 multimode, PC, UPC or APC end face. It is compliant to Telcordia, EIA/TIA and IEC standards.
Fiberstore LC LC fiber cable are made and custom to order worldwide and are fully tested to guarantee top performance. Each assembly is serialized for easy idenfication ans sealed in individual Ziploc bags. Test results are included in each order. They are constructed with high quality fiber glass abd high grade connectors with ceramic ferrules for increased durability and accuracy.

Options:

Simplex, duplex or multi fiber assemblies
Jacket types: Riser, PVC, Plenum rated, or LSZH (Low Smoke Zero Halogens) and are all RoHS cables available
Custom fiber optic cable lengths and jacket colors
Various fiber types and wavelengths, typical 9/125 single mode, 50/125 multimode and 62.5/125 multimode
0.9mm / 1.8mm / 2.0mm / 3.0mm outer diameter fiber optic cables
PC, UPC, and APC polish types.

Catalogs:

LC-LC Single Mode 9/125 Fiber Cable
LC-LC Multimode OM2 50/125 Fiber Cable
LC-LC Multimode OM1 62.5/125 Fiber Cable
LC-LC Multimode 50, 10Gb OM3 Fiber Cable
LC-LC Multimode 50, 10Gb OM4 Fiber Cable

You can buy single mode fiber cables, single-mode LC-LC on Fiberstore. You can get a lowest price for a larger order.

About Fiberstore

Fiberstore designs, manufactures, and sells a broad portfolio of optical communication products, including passive optical network, or PON, subsystems, optical transceivers used in the enterprise, access, and metropolitan segments of the market, as well as other optical components, modules, and subsystems. In particular, Fiberstore products include optical subsystems used in fiber-to-the-premise, or FTTP, deployments which many telecommunication service providers are using to deliver video, voice, and data services.

The global, vertically-integrated business model and expertise in optical design enables Fiberstore to rapidly deliver market-leading, high performance fiber optic components and subsystems. The R&D and engineering teams provide strong innovative capability , who have core technical knowledge ranging from optoelectronic device, optical subassembly, and module design, to product and manufacturing process development expertise. With over 200 employees primarily in Dong Guan and ShenZhen, we can serve the customers and distribution partners around the world fast. What’s more, our custom service and wholesale service save customers’ time and money, making customers enjoy personalization.

Company Name and Address in Hong Kong – Fiberstore Co Limited, Room 1202, 12 Floor Tung Chun Commercial Centre, 438 – 444, Shanghai Street, Hong Kong.
Company Name and Address in UK – Fiberstore (UK) Co Limited , Third Floor 207 Regent Street London W1B 3HH. (Home Page: http://www.fs.com)