Knowledge Of CWDM OADM

CWDM OADM (Coarse Wavelength Division Multiplexing Optical Add/Drop Module) is passive device to multiplex/demultiplex or add/drop wavelengths from multiple fibers onto one optical fiber. By using CWDM technology, individual channels may be optically added or dropped from a fiber pair while allowing pass-through website visitors to continue unobstructed over the bus or ring.

Main Features:
Add/drop ITU-T G.695- and G.694.2-compatible CWDM channels onto a fiber pair;
Created for utilization in outside-plant fiber splice enclosures;
Upgradeable to eight channels per fiber;
Provides low-loss pass-through for CWDM channels;
Thermally stable passive optics require no electrical energy.

The CWDM OADM splice packs are in children of flexible, low-cost solutions that expand the proportions of existing fiber. CWDM OADM bidirectional splice packs provide both east and west add/drop functionality and so are readily deployed in existing outside plant splice enclosures. They feature ample room for fiber management and splice holders. The OADM connectors are interfaced to the color-matching CWDM GBICs around the equipment side. Each of the modules are identical size.

OADM consists of three stages: an optical demultiplexer, an optical multiplexer, and with shod and non-shod a technique for reconfiguring the paths relating to the optical demultiplexer, the optical multiplexer along with a list of ports for adding and dropping signals. The optical demultiplexer separates wavelengths in a input fiber onto ports. The optical multiplexer multiplexes the wavelength channels which are to continue on from demultipexer ports with those in the add ports, onto a single output fiber.

There are four kinds of CWDM OADMs:

Dual Single-Channel OADMs (CWDM-MUX-AD-xxxx?aAllows you to definitely add/drop two channels of the same wavelength in to the two directions of your optical ring. Another wavelengths are undergone the OADM. Dual fiber can be used for both the network along with the CWDM GBIC connections. Eight versions on this OADM are available, one for each and every wavelength associated with. The twin single-channel OADMs are color coded and match the color coding with the CWDM GBICs.

4 channel CWDM OADM (CWDM-MUX-4=)?aAllows you to add/drop four channels (with different wavelengths) into one direction of the optical ring. Another wavelengths are undergone the OADM. Dual fiber can be used for the network along with the GBIC connections. The four wavelengths will 1470 nm, 1510 nm, 1550 nm, and 1590 nm.

8-Channel Multiplexer/Demultiplexer (CWDM-MUX-8=)?aAllows that you multiplex/demultiplex eight separate channels into one set of two fiber. Dual fiber can be used for both the network and also the GBIC connections. The eight available wavelengths are 1470 nm, 1490 nm, 1510 nm, 15300 nm, 1550 nm, 1570 nm, 1590 nm, and 1610 nm.

Single-Fiber 4-Channel Multiplexer/Demultiplexer (CWDM-MUX-4-SFx=)?aAllows you to multiplex/demultiplex four separate channels into one strand of fiber. Dual fiber is utilized to the connections for the GBICs and single fiber is utilized for that network connections. Both models (CWDM-MUX-4-SF1= and CWDM-MUX-4-SF2=) must be used together to create a four-channel single-fiber point-to-point link.

CWDM OADM is only one of the CWDM passive optical system, the other are CWDM MUX/DEMUX and CWDM GBIC. They provide optical networking support for high-speed data communication for metropolitan area networks (MANs) more than a grid of eight CWDM optical wavelengths in ring or point-to-point configurations.

Types of Fiber Optics for Different Application

The application of the fiber optic-optic network is more widely used, however, to note that, in the face of the different application requirements, the use of optical fiber optic is also a requirement of the strict distinction. The practical application of the optical fiber optic in a variety of optical network determines the performance of fiber optic-optic technology. The different optical fiber optics of the fiber optic networks uses different application technology.

Transmission fiber optic
Application of the optical fiber in the transmission system, first it is realized through a variety of different optical network. Up to now, the construction of a variety of fiber optic-optic transmission network topology can basically be divided into three categories: star, bus and ring. Further from the network hierarchical mold shape, and can the network from top to bottom is divided into several layers, each layer can be divided into several subnets. That is, the network and network constituted by each of the switching center and its transmission system can also continue oriented divided into several smaller subnets, so that the entire digital network can effectively communication service, the entire digitized integrated services digital network ( ISDN) is the overall goal of the communication network. Increasing the popularity of ADSL and CATV, metro access system capacity trunk backbone network expansion needs to take on different types of fiber optic
optic transmission important task.

The dispersion-compensating fiber optic (DCF)
Fiber optic dispersion can make the pulse broadening, and cause bit errors. This is a subject of the need to solve a problem that must be avoided in the communication network, but also the long- distance transmission system. Generally speaking, the fiber optic dispersion, including the two parts of the dispersion of the material dispersion and the waveguide structure, dispersion, depending on the manufacture of silica optical fiber optic mother material and dopant material dispersion and waveguide dispersion is typically a pattern of the effective refractive index with wavelength change tendency. The dispersion compensating optical fiber optic is used in the transmission system to solve a dispersion management techniques.

Amplifying optical fiber optic
Can be made of rare earth-doped silica fiber optic core within the amplifying fiber optic, such as erbium-doped amplifying optical fiber optic (EDF), thulium-doped amplifying fiber optic (TOF), etc., Amplification fiber optic and traditional quartz optical fiber optic has a good integration of performance, but also has a high output, wide bandwidth, low noise, and many other advantages. Made of optical fiber optic amplifier (EDFA) in the amplifying fiber optic is the most widely used in the current transmission system key device. EDF amplification bandwidth from the C-band (1530 1560nm) extended to the L-band (1570 1610), the amplification bandwidth of 80nm. The latest research results show that the EDF is also available in the S-band (1460 1530), optical amplification,  and induction Raman fiber optic amplifiers manufactured in the S-band amplification.

Continuous wave (SC) occurs with fiber optic
The supercontinuum wave is the the spectrum phenomenon of ultra-wideband transmission bright light pulses in a transparent medium. Widespread concern by the industry as the new generation of multi -carrier light source. From the 1970 Alfano and shapiro observed in the large-capacity glass ultra-broadband light since, it has already observed in the optical fiber optic, a semiconductor material, water, and other diverse substances ultra broadband light occurs.

Optical devices with optical fiber optic
With a large number of optical communication network construction and expansion, active and passive components usage increasing. The most widely used fiber optic-type devices, the main optical fiber optic amplifier, optical fiber optic coupler, optical wave combiner fiber optic grating (FG), AWG. The above optical devices must have low loss, high reliability, easy low loss coupling and connection can be used in the communication network and communication optical fiber optic. So on R & D to produce the FG fiber optic and devices coupled with fiber optic (LP fiber optic).

Polarization maintaining fiber optic
The earliest polarization maintaining fiber optic for coherent optical transmission fiber optic to be developed. Since then, the field of fiber optic optic sensor technology for FOG. In recent years, due to the increase in the number of DWDM transmission system in the WDM and the speed of development, the polarization maintaining fiber optic has been more widely applied. Currently the most widely Panda fiber optic (PANDA).

Source from Fiber Optic Products Official Blog by Ingellen Technology.

Just How Much Do You Understand Fiber Optic Splitter

(1).What is a Fiber Optical Splitter?

A fiber splitter optical, also called beam splitter, is really a device that takes a single fiber optics signal and divides it into multiple signals, is one of the most important passive devices within the optical fiber link. The Optical Splitters “split” the input optical signal received because of it between two optical outputs, simultaneously, in a pre-specified ratio 90:10 or 80:20.

(2). What’s Fiber Splitter Used For?

The optical network system needs an optical signal linked to the branch distribution, which necessitates the fiber optic splitter. Splitters can be built utilizing a number of single mode and multimode optical fibers with most connector types for various applications. They are offered in three different versions; as a cable, like a tabletop enclosure, and as a rack-mountable unit, which have superior design and are built from top quality components.

Optical Splitter/Couplers are used to split an optical signal into several paths for the purpose of routing optical signals to multiple near end or remote locations. Fiber optic splitter is used to distribute or combine optical signals in many applications, especially applicable to some passive optical network (EPON, GPON, BPON, FTTX, FTTH etc.) for connecting the MDF and also the terminal equipment and to attain the branching from the optical signal.

(3). How Does a Fiber Splitter Work?

Fiber splitter allows just one PON network interface to be shared among many subscribers. Splitters contain no electronics and use no power. Splitters consist of virtually no electronic devices and also utilize virtually no strength. Fiber optic splitter key parameters include the optical loss, splitting ratio, isolation, PDL, etc.

(4). What are the available kinds of fiber Splitter?

The Optical Splitter/Couplers are available in configurations from 1×2 to 1×64, such as 1:8, 1:16, and 1:32. Based on the Fiber Optic Splitter principle, additionally, it can be split into FBT Coupler (Fused Biconical Taper) and PLC Splitter (Planar Lightwave Circuit). PLC splitters offer a better solution for applications when larger split configurations (1×16, 1×32, 1×64, etc) are required.

FBT Splitter is the traditional technology in which two fibers are placed closely together and fused together by making use of heat while the assembly is being elongated and tapered. It can make two (two or more) fibers removed the coating layer gather in a certain way, stretched to both sides underneath the heating zone at the same time, form a double cone?¡¥s special waveguide structure finally to get a different splitting ratio via controlling length of the fiber torsion angle and stretch

PLC splitter is a micro-optical element using photolithographic strategies to form optical waveguide at medium or semiconductor substrate for realizing branch distribution function. It’s without a doubt a type of optical potential organization apparatus which can be created utilising silica optical waveguide concept to help you share optical indicates as a result of Essential Home office (CO) to help you many different principle venues. PLC splitters are usually place in inside every single optical community one of the PON OLT (Optical Line Terminal) and the ONTs (Optical Network Terminals) the OLT serves. Almost all FTTH jobs utilize plc splitter.

(5). Where you’ll get Fiber Splitter?

Ingellen Technology optical splitters are designed as consistent performance, low optical insertion loss, low polarization dependent loss, high reliaility and stability,s uperior environmental and mechanical characteristics, and fast installation.

Fiber Optic Splitter For Passive Optical Network

Passive Optical Network (PON) fiber splitter plays a crucial role in Fiber for the network by letting a single PON network interface to become shared among many subscribers. A PON network could be made with an individual optical splitter, or it can have two or more splitters cascaded together. These are network elements that put the passive in Passive Optical Network are available in many different split ratios, including 1:8, 1:16, and 1:32. These communication networks have enhanced capabilities that can be relied upon to deal with high-bandwidth multimedia applications as well as prepare the network for increase in the long run.

Optical splitter Specifications
Optical splitters contain no electronics and make use of no power. An optical splitter is used to divide one particular optical fiber into separate strands, for the purpose of routing optical signals to multiple near end or remote locations. The Optical Splitter supports over 7,000 IP voice, data and video network connections to one Ethernet device. Optical Splitters are available in three different versions; as being a cable, being a tabletop enclosure, so that as a rack-mountable unit, all of which have superior design and are built from high quality components. The splitter can be deployed inside the Central Office (CO) alongside the OLT, or it could be deployed within an OutSide Plant (OSP) cabinet closer to the subscribers. A splitter may also be deployed in the basement of a building for a Multiple Dwelling Unit (MDU) installation.


Optical Splitters can be bought in configurations from 1×2 to 1×64. There are 2 basic technologies for building passive optical network splitters: FBT Splitter/Coupler (Fused Biconical Taper) and  PLC Splitter (Planar Lightwave Circuit). FBT Coupler could be the older technology and usually introduces more loss than the newer PLC splitter, though both PLC splitter and FBT splitters are widely-used in PON networks. FBT attenuation tends to be a little higher than attenuation from plc splitter.

FBT Splitter makes two (a couple of) fibers removed the coating layer gather within a certain way, stretched to each party within the heating zone at the same time, form a double cone?¡¥s special waveguide structure finally to get an alternative splitting ratio via controlling length of the fiber torsion angle and stretch. A FBT splitter is manufactured by wrapping two fiber cores together, putting tension on the optical fibers, after which heating the junction before the two fibers are tapered through the tension and fused together.

PLC Splitter is often a micro-optical element using photolithographic strategies to form optical waveguide at medium or semiconductor substrate for realizing branch distribution function. PLC Splitters are positioned in each optical network involving the PON Optical Line Terminal (OLT) along with the Optical Network Terminals (ONTs) that the OLT serves.

Optical splitters are traditionally used in Networks implementing BPON, GPON, EPON, 10G EPON, and 10G GPON technologies currently.

Overview PLC Splitters—Main Feature And Common Kinds

PLC Splitter (Planar waveguide Circuit) are developed using silica glass waveguide circuits and aligned fiber pigtails, divide a single/dual optical input(s) into multiple optical outputs uniformly. PLC splitter is designed for FTTx Passive Optical Networks, CWDM, DWDM and optical cable TV System, which is widely used in FTTX developments, PON networks, CATV links and optical signal distribution currently.

Splitters contain no electronics and use no power. They are the network elements that put the passive in Passive Optical Network and are available in a variety of split ratios, including 1:8, 1:16, and 1:32. The PLC splitters provide low-cost solution for optical signal distribution in PON network, with small form factor and superb reliability, meets various application requirements in different environments. The high quality performance including low insertion loss, low PDL, high return loss and ideal uniformity more than a wide wavelength range between 1260 nm to 1620 nm, and operate in temperature from -40℃ to 85℃.

PLC splitter is a high quality passive device. It is especially for passive internet (EPON, BPON, and GPON). The different splitter package meet people’s different requirement. There are three common used PLC Splitters, including bare PLC splitter, Blockless PLC Splitter and Rack Mount PLC Splitter

Bare PLC splitter
Standard plc bare fiber splitter are with equal slitting ratio in 1XN and 2XN structure, 1X2,1×4, 1×8,1×16, 1×32 and 1×64 PLC Splitters, 2×4, 2×8, 2×16, 2×32 bare fiber PLC splitters.
Bare Fiber PLC Splitter Features:
Low insertion loss;
Low excess loss;
Low Polarization Dependent Loss;
High directivity;
Long haul reliability;
Customer defined specifications.

Bare Fiber PLC Splitter Applications:
Fiber to The Point (FTTX);
Fiber to The Home (FTTH);
Passive optical networks(PON);
Local Area Networks (LAN);
Cable Television (CATV);
Test Equipment.

Blockless PLC Splitter
Blockless PLC Splitter uses PLC & Package technology to split one wavelength into many ports, from 4 way to 32 way. It has no fan-out block so you can save space and achieve smaller splitter modules.

Rack Mount PLC Splitter
19″ standard Rack Mount PLC Splitter is a key component in FTTH and is responsible to distribute the signal from CO to numbers of premises. The highly stable splitter performs superbly across temperature and wavelength providing low insertion loss, low input polarization sensitivity, excellent uniformity, and low return loss in configuration of 1×4, 1×8, 1×16, 1×32 and 1×64 port.

Ingellen provides a wide variety of 1xN and 2xN plc splitters, which can be designed for exact functions. Our PLC splitter products are without a doubt warranted to help you prime quality and even most beneficial rate. You can easily customize PLC splitter to suit your exact conditions.