Effective Fiber Optic Communications Equipment-CWDM

The use of fiber optic cables for communication has opened up gates for communication multiplexing technologies that maximize the capabilities at minimum costs. Coarse wavelength division multiplexing, or CWDM, modulates different wavelength laser beams with multiple signals. 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. Companies simply use the right optical amplifiers, multiplexers and de-multiplexers to enhance capacity of the fiber optic using CWDM technology. Related technologies are dense wavelength division multiplexing (DWDM) and conventional WDM. Conventional WDM use the 3rd transmission window with a wavelength of 1550nm, accommodating up to 8 channels. DWDM is the same but with a higher density channel. Systems may use 40 channels, each at 100 GHz spacing or 80 channels spaced 50 GHz apart. A technology, the ultra dense WDM is capable of working at a spacing of only 12.5 GHz, allowing more channels. DWDM and WDM are expensive in contrast to CWDM. In CWDM technology, there is an increase in channel space. This translates to requirement of less sophisticated and less costly transceiver devices. Operating in the same window of 1550 nm and making use of OH-free silica fibers, maximum efficiencies are achieved in channels 31, 49, 51, 53, 55, 57, 59 and 61. The channels are spaced 20 nm apart. DWDM spaces them 0.4 nm apart. Less precision optics and lower cost, uncooled lasers with lower maintenance requirements can therefore be used in CWDM devices, operating in the region of 1470, 1490, 1510, 1530, 1550, 1570, 1590 and 1660nm. 18 different channels can be used with wavelengths up to 1270 nm. In addition to being cost effective, power consumption for laser devices used in CWDM technology is also far less. CWDM signals cannot be transmitted long range but are perfect for applications within a range of 60 km such as in a city and for cable television networks allowing upstream and downstream signals. A number of manufacturers offer all related CWDM multiplexers, demultiplexers and optical amplifiers. Networking solution providers are the right people to seek guidance for use of CWDM, DWDM or WDM technology. Networking solution providers carry out the entire installation and commissioning of the right, integrated devices for error-free high speed, high data transmissions over fiber optic lines. Cost and performance optimized CWDM solutions with built in expansion capabilities are available from reliable and trusted online network solution companies. Choose the right one with years of experience and technological expertise to provide the right CWDM solution. Fiberstore is an China company that specialises in selling quality network connection parts. All of our Cwdm module and Cwdm sfp have a best warranty and very competitively priced as well as being of the highest quality. So you can buy our products with confidence  

Small form-factor pluggable SFP

The small form-factor pluggable (SFP) is a compact, hot-pluggable module used for both telecommunication and data communications applications. sfp module can be regarded as the upgrade version GBIC, unlike GBIC with SC fiber optic interfaces is with LC interface and the main body size of SFP is only about half of GBIC transceiver, which makes SFP space saving, and it interfaces a network device mother board (for a router, switch, media converter or similar device) to a fiber optic or copper networking cable. It is a popular industry format supported by many network component vendors. SFP module module are designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards.

SFP module are available with a variety of transmitter and receiver types, allowing users to select the appropriate module for each link to provide the required optical reach over the available optical fiber type (e.g. multi-mode fiber or single-mode fiber). Optical SFP modules are commonly available in several different categories:
>>For multi-mode fiber, with black or beige extraction lever

SX – 850 nm, for a maximum of 550 m at 1.25 Gbit/s (Gigabit Ethernet) or 150m at 4.25 Gbit/s (Fibre Channel)
>>For single-mode fiber, with blue extraction lever
LX – 1310 nm, for distances up to 10 km
BX – 1490 nm/1310 nm, Single Fiber Bi-Directional Gigabit SFP module, paired as BS-U and BS-D for Uplink and Downlink respectively, also for distances up to 10 km
1550 nm 40 km (XD), 80 km (ZX), 120 km (EX or EZX)
CWDM and DWDM modules at various wavelengths achieving various maximum distances
>>For copper twisted pair cabling
1000BASE-T – these modules incorporate significant interface circuitry and can only be used for Gigabit Ethernet, as that is the interface they implement. They are not compatible with (or rather: do not have equivalents for) Fibre channel or SONET.

BiDi SFP 
CWDM SFP
DWDM SFP

CWDM SFP and DWDM SFP Transceiver moudle Recommend

The following recommend CWDM SFP and DWDM SFP all Compatible for Cisco swith and router.

The following recommend CWDM SFP and DWDM SFP all Compatible for Cisco swith and router.

And the CWDM SFP module are from 1000Base to 4Gbase. The DWDM SFP all  are 2.5G.Price is different according the size of capacity.

Cisco DS-CWDM4G1590    4G CWDM SFP Transceiver Module

Cisco CWDM-SFP-1470-120   1.25G CWDM SFP Transceiver 

Cisco CWDM-SFP-2.5G-1610   2.5GCWDM SFP Transceiver Module

Cisco CWDM-SFP-1430 1000Base-CWDM SFP Transceiver 

Cisco DWDM-SFP-2877 CH61 2.5G Transceiver Module

Cisco DWDM-SFP-3504 CH53 2.5GTransceiver Module

 Cisco DWDM-SFP-4851 CH36 Compatible Transceiver ModuleThe following recommend CWDM SFP and DWDM SFP all Compatible for Cisco swith and router.

And the CWDM SFP module are from 1000Base to 4Gbase. The DWDM SFP all are 2.5G.Price is different according the size of capacity.

Cisco DS-CWDM4G1590 4G CWDM SFP Transceiver Module
Cisco CWDM-SFP-1470-120 1.25G CWDM SFP Transceiver
Cisco CWDM-SFP-2.5G-1610 2.5GCWDM SFP Transceiver Module
Cisco CWDM-SFP-1430 1000Base-CWDM SFP Transceiver

price：$150.00-$80.00
Cisco DWDM-SFP-2877 CH61 2.5G Transceiver Module
Cisco DWDM-SFP-3504 CH53 2.5G Transceiver Module
Cisco DWDM-SFP-4851 CH36 Compatible Transceiver Module

price：$580.00

This information from :FiberStore