Kinds Of CWDM Moudules

Coarse Wavelength Divison Multiplexer/Demultiplexer Module (CWDM Mux/Demux) is really a flexible, low-cost solution that effective at combining nine optical signals in to a fiber pair. The CWDM Mux/Demux is designed to interoperate with the WaveReady distinct transponder and optical regenerator solutions as well as CWDM transponders and small form-factor pluggables (SFPs) utilized in acquireable transmission equipment.

Common utilizations of CWDM technology include the multiplexers and de-multiplexers or optical amplifiers to improve the ability in the fiber optic cable. The CWDM Mux/Demux modules including CWDM MUX and CWDM Demux, are designed to multiplex multiple CWDM channels into 1 or 2 fibers. As well as highly reliable passive optics certified for environmentally hardened applications, the CWDM Mux/Demux lets operators use available fiber bandwidth in local loop and enterprise architectures.

In accordance with the wavelength or running channels in the each signal, CWDM MUX/DEMUX includes 4CH, 5CH, 8CH, 9CH, 16CH, 18CH CWDM Mux/Demux. These CWDM MUX/DEMUX can be found in 19″ Rack Mount or LGX module package.

4 channel CWDM MUX/DEMUX Module general features:
Low Insertion Loss;
Low PDL;
Compact Design;
Good channel-to-channel uniformity;
Wide Operating Wavelength;
Wide Operating Temperature;
From -40??C to 85??C;
High Reliability and Stability.

4 channel CWDM MUX/DeMUX Module Applications:
CWDM System;
PON Networks;
CATV Links.

CWDM supplies the most economic and efficient wavelength division multiplexing solutions for metro edge and access networks. Ingellen CWDM modules cover 2 channel, 4 channel, 5 channel, 8 channel, 9 channel, 16 channel and 18 channel CWDM Mux/Demux. Ingellen Technology offers CWDM OADMs (Optical Add/Drop Module) from 1 to 16 channels for CWDM networks, including 1 channel, 2 channel, 4 channel, 8 channel and 16 channel CWDM OADM.

The CWDM OADMs are passive devices that can multiplex/demultiplex or add/drop wavelengths from multiple fibers onto one optical fiber. Through the use of CWDM technology, individual channels might be optically added or dropped from a fiber pair while allowing pass-through visitors to continue unobstructed through the bus or ring. It offers low insertion loss, high channel isolation, wide pass band, low temperature sensitivity and epoxy free optical path.

1 channel CWDM OADM Key Features:
Add/drop ITU-T G.695- and G.694.2-compatible CWDM channels onto a fiber pair;
Designed for use in outside-plant fiber splice enclosures;
Upgradeable to 8 channels per fiber;
Provides low-loss pass-through for CWDM channels;
Thermally stable passive optics require no electrical energy.

1 channel CWDM OADM Applications:
Provides fiber conservation or reclamation for CWDM wireless backhaul, broadband, and other services;
Supports linear (bus) and ring add/drop architectures.

Things You Should Know About Filter WDM

Wavelength-division multiplexing (WDM) is overtaking since the leading technology in point-to-point transmission links. One key method is a tunable optical filter. Important features of this type of filter include low insertion loss, narrow bandwidth, high sidelobe suppression, large dynamic range, fast tuning speed, a simple control mechanism, small size, and expense effectiveness. Filter WDM module will depend on Thin Film Filter (TFF) technology. The FWDM is extensively found in EDFA, Raman amplifiers, WDM networks and fiber optics instrumentation. The unit combines or separates light at different wavelengths in the wide wavelength range. Since FWDM series offer minimal insertion loss, low polarization dependence, high isolation and excellent environmental stability, perfect for very fast WDM network systems. It really is traditionally used in optical fiber systems:1310/1550nm, 1480/1550nm, 510/1550nm, 980/1550nm and 1310/1490/1550nm.

FWDM Main Features:
Wide Operating Wavelength Range;
Low Insertion Loss;
Ultra Flat Wide Passband;
High Channel Isolation;
High Stability and reliability;
Epoxy-free on Optical Path.
FWDM Applications:
Testing Instruments;
FTTH Tri-Play System.

WDM is a method of combining multiple signals on lasers at various infared (IR) wavelengths for transmission along fiber optic media. Each laser is modulated by an impartial pair of signals. Wavelength-sensitive filters, the IR analog of visible-light color filters, are employed on the receiving end.

WDM is comparable to frequency-division multiplexing (FDM). But rather than going on at radio frequencies (RF), WDM is done inside the IR element of the electromagnetic (EM) spectrum. Each IR channel carries several RF signals combined by using FDM or time-division multiplexing (TDM). Each multiplexed IR channel is separated, or demultiplexed, in the original signals with the destination.

The usage of WDM can multiply the effective bandwidth of an fiber optic communications system with a large factor. However its cost should be compared to the choice of utilizing multiple fibers bundled in to a cable. A fiber optic repeater device referred to as erbium amplifier plans to make WDM a cost-effective long-term treatment for the bandwidth exhaustion problem.

Ingellen offers a wide selection of WDM/CWDM/DWDM devices, like CWDM Mux/Demux, CWDM OADM, DWDM Mux/Demux, DWDM OADM, Filter WDM and so on. Ingellen 1310/1490/1550 WDM devices based on thin-film filter technology are design to address the precise requirements from the FTTP market. Strong coating and passive device packaging capabilities feature these WDMs with excellent optical performance, good reliability and ultra-compact size. Ingellen’Fliter WDM utilizes thin film coating technology and proprietary design of non-flux metal bonding micro optics packaging.

Optical Transceiver and Patch Cable Lifetime

This is an article introducing tow of the important fiber optic equipments, fiber patch cable and optical transceiver.

As the staff working for fiber optic telecommunication project, you must be very interested in the working life of fiber optic patch cable and optical transceiver. In the next text, I will introduce their working lifetime for you.

Fiber patch cable, or fiber jumper is the most used fiber optic cable plant equipments in the modern communications industry. Due to its long connection distance, low inset loss, good reproducibility and less return loss. It is able to support multiple devices work with features of interfix performance, not heat, good temperature stability. Fiber jumpers apply to cable networks, telecommunications networks, computer fiber optic network and optical test equipment.

Due to maintenance needs of transferring fiber optic jumper and normal testing, fiber optic connectors is always to be plugged. This makes the plug life the maximum pluggable times. This leads.

This problem is proposed based on the premise that: fiber optic connectors, under normal working conditions, by the provisions of the number of mating, each component mechanical damage, the additional loss does not exceed the limit value (usually the limit of the provisions of 0.2 dB). The optical connector plug life is generally determined by the mechanical wear of the components.

Optical fiber connector plug life can generally achieve greater than l000, the additional loss does not exceed 0.2dB. To the optical connector using slotted ceramic coupling sleeve, since the ceramic material is present to crack growth, the static fatigue will cause the sleeve to rupture. According to the information, the unscreened such sleeve, 20-year probability of rupture are 10-4.  If the screening test force increase 2.6 times, then in 20 years will not rupture.

Fiber optic transceiver, as one of the important optical fiber transmission equipments, the working lifetime are closely related with the optical modules insides. The average service life is about five years. The long-term use of fiber optic transceivers, after five years, the main device, optical module, will not working properly because of the loss is too large and the laser damage.

Source from Life of the Fiber Optic Patch Cable and Fiber Optic Transceiver

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.

Structure
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.