1. What is the DWDM optical module? What are the main advantages of DWDM optical modules?
The DWDM optical module is a dense wavelength division multiplexing technology that can couple different wavelengths of light into a single-core optical fiber for transmission. The channel spacing of the DWDM optical module is 0.4 nm, 0.8 nm, 1.6 nm, etc., and the interval is small, requiring additional wavelength control devices. Its main advantage is that it is the most effective solution to solve the line bandwidth expansion.
2.What are the classifications of DWDM optical modules?
Compliant with the IEEE802.3 Gigabit Ethernet standard and the ANSI Fibre Channel specification, the DWDM SFP optical module provides high-speed serial links with transmission rates from 100Mbps to 2.5Gbps for interconnects in Gigabit Ethernet and Fibre Channel environments.
The DWDM SFP+ optical module is the best solution for 10 Gigabit bandwidth applications, designed for operators and large enterprises to build scalable, flexible, and cost-effective systems.
DWDM XFP optical modules are compliant with current XFP MSA specifications and are capable of supporting SONET/SDH, 10 Gigabit Ethernet and 10 Gigabit Fibre Channel applications.
The DWDM X2 optical module complies with the Ethernet IEEE 802.3ae standard and is a high-performance serial optical module for high-speed, 10 Gigabit data transmission applications, as 10 Gigabit Ethernet data communication (rack-to-rack, client interconnect) The ideal solution for your application.
The DWDM XENPAK optical module supports 32-channel data transmission with a distance of up to 200km under the action of the optical amplifier EDFA. It is the first 10 Gigabit Ethernet optical module supporting DWDM.
3. What is the CWDM optical module? What are the characteristics of CWDM optical modules?
The CWDM optical module adopts CWDM technology, which can combine optical signals of different wavelengths through an external wavelength division multiplexer, because it transmits through one optical fiber, thereby saving fiber resources. At the same time, the receiving end needs to decompose the complex optical signal using a wave decomposition multiplexer. In addition, CWDM optical modules can be plugged into a switch or router SFP port.
4. What is a CWDM4 optical module? What is the difference between it and the PSM4 optical module?
The transmission rate of the CWDM4 optical module is 103.1 Gbp, which is mainly used in computing, high-frequency transactions, etc., and its cost is significantly higher than that of the QSFP28 PSM4 optical module.
(1) Light emitter: PSM4 requires four integrated silicon photonic modulators and one distributed feedback laser. CWDM4 requires four CWDM direct modulation lasers.
(2) Connector: PSM4 requires MPO connector (with 8 fibers), CWDM4 requires duplex LC connector
(3) Fiber: PSM4 is a ribbon SMF (8 core), CWDM4 is a duplex SMF
(4) Transmission distance: PSM4 is 500 meters, CWDM4 is 2000 meters
(5) Four-wavelength CWDM multiplexer: PSM4 is not required, CWDM4 is required
5. What are the main packaging methods and types of CWDM optical modules?
The CWDM optical module package is available in three types: SFP, SFP, and XFP optical modules. The transmission distances are generally as follows: 40KM, 80KM, 100KM, and 120KM.
CWDM optical modules can be classified into CWDM SFP optical modules, CWDM GBIC optical modules, CWDM SFP optical modules, CWDM XFP optical modules, CWDM X2 optical modules, CWDMXENPAK optical modules, and CWDM LX-4 optical modules.
6. What is the difference between a CWDM optical module and a normal optical module?
The CWDM optical module is a passive module that does not emit laser light itself. Generally, optical planar waveguide (PLC) technology is used, which simply divides a beam of light into several beams of light. The ordinary optical module belongs to the photoelectric conversion device and is an active optical module. Each module has one receiving and two ports, and the inside of the transmitting port is a laser.
CWDM optical modules are widely used in campus, data center, FTTH (fiber to the home), 1G and 2G Fibre Channel, Gigabit Ethernet in metropolitan area networks, security and protection systems.
DWDM optical modules are mainly used in long-distance optical synchronous digital transmission networks, such as Ethernet/Fibre Channel with 200km link and 80km link.
8. What is the difference between a CWDM optical module and a DWDM optical module?
The principle of a DWDM optical module is similar to that of a CWDM optical module. The DWDM optical module is an optical module for dense wavelength division multiplexing. It has 40 common channels to choose from.
9. Which is better for CWDM optical modules and DWDM optical modules?
From a cost perspective, CWDM optical modules are less expensive than DWDM optical modules. CWDM optical modules provide a convenient and low-cost solution for using Gigabit Ethernet and Fibre Channel.
On the other hand, DWDMs typically use denser channel spacing and are used for larger optical networks over longer distances. If you want long-range SFP modules, DWDM optical modules are ideal.
In conclusion
The CWDM optical module is a multi-rate optical module with transmission distances of 20-40km, 40-80km and 80-120km, and different colors mark optical modules of different wavelengths, which can better meet customer requirements. HTF's CWDM optical modules are compliant with IEEE802.3 Gigabit Ethernet standards and requirements, and compatibility and performance stability are guaranteed. For more details, check out the HTF (htfwdm.com) website.
