Author: Fiber-MART.COM

eShop of Fiber Optic Network, Fiber Cables & Tools

What Is a Fiber-Optic Multiplexer?

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A fiber-optic multiplexer is a device that processes two or more light signals through a single optical fiber, in order to increase the amount of information that can be carried through a network. Light wavelengths are narrow beams that ricochet through reflective optical tubing, sometimes over long distances, to provide instantaneous electronic signal processing at the speed of light. Multiplexers work by increasing a fiber’s transmission capacity using different techniques and light source technologies. When the signal arrives at its destination, a demultiplexer separates the data streams. Using a multiplexer also allows data to be sent farther, more securely, and with less electromagnetic and radio frequency interference.
Also known as a mux, the fiber-optic multiplexer saves time and cost by squeezing more information through the optical network pathway. It is possible to split signals by varying the schedule or period of each transmission. Time Division Multiplexing (TDM) combines multiple signals by rapidly alternating between them so that only one is transmitting at any given time. Statistical Time Division Multiplexing (STDM) assigns each signal a specific time slot in order to optimize bandwidth usage. Further techniques include divisions of wavelength and frequency.
Wavelength Division Multiplexing (WDM) utilizes the total available pass band of an optical fiber. It assigns individual information streams different wavelengths, or portions of the electromagnetic spectrum. Similarly, Frequency Division Multiplexing (FDM) assigns each signal a different frequency. Carrier frequencies contain the signal while unused guard frequencies provide buffering to reduce interference. This helps minimize audible and visual noise and preserves the integrity of the original signal throughout the network.
Fiber-optic multiplexer technology serves single-mode and multimode optical fibers with multichannel rack mount or standalone units. This makes mixing channels with different configurations possible for a range of interface combinations. These devices provide stronger, more reliable transmissions in areas that have a lot of electromagnetic, radio frequency, or lightning interference.
As technology improves and information needs grow to fill the capacities of existing networks, equipment such as the fiber-optic multiplexer lessens the need to upgrade the fiber-optic infrastructure itself. Multiplexers permit new configurations of transmission protocols by increasing the amount of wavelengths or frequencies of light signals. By upgrading repeaters and terminal equipment, existing network transmission capacity can expand with demand.
Used by cellular carriers, Internet service providers, public utilities, and businesses, fiber-optic multiplexer technology extends the reach and power of telecommunications technologies. Network management systems allow for system service and maintenance, and provide for security, fault management, and system configuration. With advantages like lower costs and longer life expectancies, current fiber-optical networks are aided by improvements in multiplexing technology, and may provide light speed data transmission well into the future.

Differences Between FBT Coupler and PLC splitters

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Optical networks require signal being splitted somewhere in design to serve for multiple customers. Splitter technology has made a huge step forward in the past few years by introducing PLC (Planar Lightwave Circuit) splitter. It has proven itself as a higher reliable type of device compared to the traditional FBT (Fused Biconical Taper) splitter. While being similar in size and outer appearance, both types of splitters provide data and video access for business and private customers. However, internally the technologies behind these types vary, thus giving  service providers a possibility to choose a more appropriate solution.
FBT splitter is made out of materials that are easily available, for example steel, fiber, hot dorm and others. All of these materials are low-price, which determines the low cost of the device itself. The technology of the device manufacturing is relatively simple, which has the impact on its price as well. In scenario where multiple splits are needed, the size of the device may become an issue. It is important to keep in mind that splitters are being deployed in the fields either in cabinets or in strand mountings, so the size of device plays a critical role. FBT splitters only support three wavelengths (850/1310/1550 nm) which makes these devices unable to operate on other wavelengths. Inability of adjusting wavelengths makes FBT splitters less customizable for different purposes. Moreover, the devices are to a high extent temperature sensitive, providing a stable working range of -5 to 75 C. In certain areas, such as Scandinavian countries this temperature restrictions may be crucial. The signal processed by FBT splitters cannot be splitted evenly due to lack of management of the signals
PLC splitter manufacturing technology is more complex. It uses semiconductor technology (lithography, etching, developer technology) production, hence it is more difficult to manufacture. Therefore, the price of the device is higher. However, there is a number of advantages the device possesses. The size of the device is compact, compared to FBT splitters, making it suitable for density applications. PLC splitter operates at wider temperature range (-40 to 85 C), allowing its deploying in the areas of extreme climate. The split ratio goes up to 64, providing a high reliability. Furthermore, the signal can be split equally due to technology implemented. A range of wavelengths (1260 – 1650 nm) is provided, so the wavelengths are adjustable. Critical points of the device that might fail are input and output, so the general risk of failure is low.

Channel CWDM Mux & DeMux – Features and Applications

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The CWDM are by and large in view of thin coat channel innovation which is the type of item fall under the WDM class. There arrived in a total scope of Class-8 CWDM Mux-Demuxand also OADM that stands for Optical Add Drop Multiplexer units with a specific end goal to meet a wide range of necessities and system arrangements.
Likewise, it has across the board applications that require the Channel CWDM. Some of them include: Gigabit and 10G Ethernet, Fiber Channel, ATM, ESCON, in Metro total, SDH/SONET, and CATV and so forth. Presently, we should talk about the accompanying components and utilizations of Channel CWDM that settle on it an ideal decision for all. The CWDM Mux / Demux items give up to 16-channel or even 18-channel Multiplexing on a solitary fiber. Standard CWDM Mux/Demux bundle sort include: ABS box bundle, LGX pakcage and 19″ 1U rackmount.
Highlights
The loss of insertion quality creates from the presentation of a gadget into the optical fiber is by and large lesser in CWDM than alternate gadgets; this produces short inclusion costs.
Channel-8 CWDM is dependably very steady and solid in the meantime. Not at all like every other sort of WDM class, the Channel CWDM has higher dependability.
The CWDM items are typically Epoxy free on optical way; this prompts better working and Epoxy free condition while the execution.
In CWDM, the channel segregation is very high. This expanded seclusion prompts better and successful outcomes.
Applications
WDM and Access Organize: As these channel sorts are the piece of WDM class, these have their best application in the WDM and also Access systems.
Line Observing: These items have their incredible use in line checking. This guarantees there is no crash on a similar line of some other range or frequency.
Cellular Application: The CWDM channel arrangements have their utilizations and applications additionally in the Cellular area, and advances as the unequaled panacea for some different parts and ventures.
Telecommunication: The broadcast communications devours Channel-8 CWDM at an incredible rate. It needs to utilize these items for the straightforward transmission of signs and utilization of the filaments for the same.
Aside from every one of the elements and applications, the capacity of CWDM is additionally to unravel the deficiency of fiber and straightforward transmission of exchange while lessening the charges of system building. This is the motivation behind why the Channel CWDM and LGX CWDM Mux and DeMux Module have a matter of extraordinary heights in the realm of fiber optics, flag transmission and multiplexing and so forth.

Know the Difference between CWDM and DWDM

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A WDM (Wavelength Division Multiplexing) is a system that uses a multiplexing (at the transmitter) and a demultiplexer (at the receiver) for the completion of the process and transmission of the signals.
The WDM is divided into three types (WDM, CWDM and DWDM) on the basis of wavelength difference among the three. The article discusses the main differences among CWDM and DWDM.
CWDM stands for Coarse Wavelength Division Multiplexing, and DWDM is the acronym for Dense Wavelength Division Multiplexing. Whether DWDM or CWDM, both are the types of WDM mechanism and have an array of differencess.
Let’s get acquainted with the chief difference between CWDM and DWDM:
The Coarse WDM has less than 8 active wavelengths per optical fiber whereas the DWDM has more than 8 active wavelengths per optical fiber.
The CWDM has lower capacity strength and hence is low in costs; conversely the DWDM possesses high capacity –this leads to an augmented price which is worth its qualities.
When it comes to the difference between the distance of the two, the CWDM has short range communication because the wavelength is not amplified, and DWDM has long range communication.
CWDM Mux and Demux systems are developed to be used in multiplexing multiple CWDM channels into one or two fibers.
Another major difference is that DWDM systems are made for longer haul transmittal, by keeping the wavelengths closely packed. Also, a DWDM device can transmit more data over long distances and to a significantly larger run of cable with lesser interference than a comparable CWDM system which has a shorter haul transmittal.
Furthermore, the Dense Wavelength Division Multiplying systems are capable to fit more than forty different data streams in the amount akin to that of fiber used for two data streams in a CWDM system.
Apart from all the difference there is one more and that is wavelength drift is possible in CWDM, but when it comes to the DWDM –precision lasers are needed to keep channels on the target.
Beyond being different from each other –these systems play different roles in the effective transfer of the signals, and thereby both are important enough.

Know All about the DWDM and its Utilization and Significance

by http://www.fiber-mart.com

WDM is the abbreviation for Wavelength Division Multiplexing, it is a popular technology used in currently fiber optic communication systems. By WDM, we can split a number of optical lights in an optic fiber into a number of discrete wavelengths. Each wavelength can be considered to an independent channel running at a special data rate of 5Gbit/s, 10Gbit/s, 40Gbit/s or even 100Gbit/s. If the light in the fiber is split into 16 channels, and each channel running at 40Gbit/s, the total data transmission rate will be 640Gbit/s. In effect, this means maximized use of a single fiber optic to transmit and receive a large number of signals, minimizing costs for telecom companies. WDM technology is also the working principle of optical amplifiers, multiplexers, and demultiplexers. Next, I will give a separate introduction about WDM/CWDM/DWDM technologies.
DWDM and Conventional WDM
DWDM stands for Dense Wavelength Division Multiplexing. It means the divided wavelength channels are very narrow and close to each other. It is widely used for the 1550nm band so as to leverage the capabilities of EDFA (Erbium Doped Fiber Amplifiers), which are effective for wavelengths between approximately 1525-1565 nm (C band), or 1570-1610 nm (L band). Conventional WDM Conventional WDM uses the 3rd transmission window with a wavelength of 1550nm, accommodating up to 8 channels. DWDM basically is the same however along with the higher density channel. An ultra-dense WDM is capable enough to work at the spacing of just 12.5 GHz, allowing some more channels.
CWDM
CWDM refer to Course wavelength division multiplexing, in CWDM technology, it shared the fact that the choice of channel spacing and frequency stability which is the EDFA could not use. There is an increase in channel space; it cannot be used in EDFA. One basic meaning for the CWDM is two (or more) signals are multiplexed onto the single fiber, where one signal was into the 1550 nm band, and then another one into the 1310 nm band. Currently, there is an increase in the channel space. This means the need for less sophisticated and less costly transceivers devices. Working into the similar window of 1550 nm as well as making the utilization of OH-free silica fibers, the maximum efficiencies are gained into the channels 31, 49, 51, 53, 55, 57, 59 and 61 utilizing the wavelengths from 1270 nm through 1610 nm along with the channel spacing of 20 nm. CWDM devices are commonly used in fewer precision optics and lower cost, un-cooled lasers with lower maintenance requirements? Compared with DWDM and Conventional WDM, CWDM is much more cost-effective and less power consumption of laser devices.
Currently, kinds of related CWDM MUX/DEMUX or DWDM MUX/DEMUX or optical amplifiers are available in the market. Networking solutions provider is the right ones to ask for guidance for use of CWDM, DWDM or WDM technology. Choosing the right one means the correct, integrated devices for error-free high-speed data transmission over fiber optic networks. Cost-effective CWDM solutions with optimized performance and built-in expansion capabilities are available from a host of online network solution companies. Choosing the most experienced one to get the reliable CWDM solution is critical.

3×1 Multimode Fiber High Power Combiners (Power per Multimode Input: 25W)

FM SKU#:SKU00210G2
Model#:FM-PC-3X1-25W
MFG PART#:

3 × 1 Multimode Pump Combiners

3 × 1 Multimode Pump Combiners can be used for high power fiber laser and fiber amplifier. These devices can be used to combine the power from several multimode laser diodes with high coupling efficiency. We could provide 4X1, 7X1 Multimode Pump Combiners, also the configurations such as number of input fibers and different fiber types can be fully customized based upon request. If you need, please contact sales@fiber-mart.com.

 

Applications

    • High Power All-Fiber Lasers
    • High Power Fiber Amplifiers
    • Medical, industrial, defense

 

Features

    • High Signal Transfer Efficiency
    • High Pump Efficiency
    • Wavelength Insensitive>
    • Custom Configurations Available

 

Product specifications

    • Pump Operating Wavelength: 800-1000nm
    • Configuration: 1XN
    • Pump Fiber (core/clad, NA): 105/125, 0.15
    • Output Fiber (core/clad, NA): 200/240, 0.22
    • Power per Multimode Input: 25W
    • Fiber length: 0.8m
    • Package Dimension: Φ3.5xL40mm or 65x12x7.5mm for high power

 

Dimensional Drawing


 

Specification

Configuration Pumpfiber Ouputfiber Min.PumpEfficiency Max.PowerHandling Package
2×1 105/1250.15 105/1250.22 90% 50W/leg P32
3×1 105/1250.15 200/2200.22 95% 50W/leg P32
3×1 105/1250.22 200/2200.22 93% 50W/leg P32
4×1 105/1250.15 200/2200.22 95% 50W/leg P32
4×1 105/1250.22 220/2420.22 90% 50W/leg P32
4×1 200/2200.22 400/4400.22 90% 150W/leg P32
7×1 105/1250.15 200/2200.22 90% 80W/leg P32
7×1 105/1250.15 x/125DC 93% 80W/leg P32
7×1 105/1250.22 x/125DC 90% 80W/leg P32
7×1 200/2200.22 x/400DCF 96% 200W/leg P32,P33
7×1 220/2420.22 x/400DCF 96% 200W/leg P32,P33
19×1 105/1250.15 400/4400.22 90% 50W/leg P32,P33
19×1 105/1250.15 x/200DC 95% 50W/leg P32,P33
19×1 105/1250.22 x/250DC 95% 50W/leg P32,P33
  • Remark: x=core dia., above are popular types, total >50 N×1 types are available.