Author: Fiber-MART.COM

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How to use optical patch cord correctly?

Both optical patch cord and optical transceiver have single mode / multimode. If the collocation is wrong when using, it will lead to the parameter error of the optical modules. How to match the use of patch cord and optical transceiver? Today, we will share the knowledge with you, hope that can will be helpful for you!
What are the differences between single mode and multimode optical modules?
The wavelength of single mode modules are 1310nm and 1550nm, transmission distance can up to 160KM. A metropolitan area network that is commonly used for long distance and relatively high transmission rates.
The wavelength of single mode modules is 850nm, transmission distance can only up to 2KM. Used in short-distance transmissions.
What are the differences between single mode and multimode optical optical fiber?
Single mode fiber transmission has high frequency bandwidth, long transmission distance and high cost; The core diameter is small, usually is 9/125um; Dispersion is small, allowing only one mode to transmit. Single mode optical fiber can transmit optical fiber directly to the center, generally used for long distance data transmission.
Multimode fiber has low transmission speed and short distance, but its cost is relatively low; With a larger diameter, usually is 50 or 62.5 um; The dispersion is large, hundreds of mode transmissions are allowed. Multimode fibers are often used in short distance data transmission.
Optical modules and patch cords must be properly matched for normal use. Below we will list the results of mashup.
If the optical fiber in the data center are all multimode, then you’d better use multimode optical modules, single mode and multimode can’t be mixed. Because the core diameter of single-mode fiber and multimode fiber is very different, it will cause too much loss when matching.
After reading this article, believe that you will have a certain understanding on how to match the patch cords and modules!

What are the advantages of the 100G XFP module?

The 100G XFP transceiver adoption rate in optical landscape is consistently on the rise for the past few years. It is predicted that over half of the data center optical transceiver transmission will make the shift to 100G. The traditional 10G or even 40G may not be enough considering the explosion of data, therefore, 100G is going to become the new standard, and it has the following advantages.
※ Cost Efficiency
100G now delivers a compelling price point, offering far greater capacity increases for the cost. And it still future-proofing the network with unsurpassed bandwidth.
※ Proactive Scale
100G offers the expansion and scalability to support the reliability, manageability and flexibility demanded of modern networks while preparing data centers for future bandwidth and speed requirements.
※ Speed and Capacity
100G optical transport will not be enough for data intensive industries. Thus 100G is specifically designed to transport enormous amounts of data with ultra-low latency.
※ Flexibility
100G will be the preferred technology across long-haul networks. 100G networking can be customized, optimized, and easily expanded to allow for changes in the future.
※ Cost Decrease
The market transition to 100GE is now in full force. The growth in 100G deployments will undoubtedly drive down the cost of 100G transceiver modules.

The importance of switches in optical module testing

With the increasingly fierce competition in the optical communication market, the price of the optical module is irregular, such as Cisco, HUAWEI, H3C, Juniper, ZTE, Extreme etc. The price of these big brand module is very high, the market capacity of third party compatible module is increasing continuously.
Used optical transceiver also appears on the market, so the customers will be prohibitive because of the high price for the big brand. But worry about the used goods will bring unnecessary trouble to the communication if low price, so these days whether it is online or offline customers, they asked a lot of similar questions: “ Must be high quality! Can guarantee compatible with Cisco?
Market demand for prices continue to decline, but the quality control has been unable to reduce the standard, but can’t reduce the standard of the quality control, this is also a great opportunity for our third party compatible module. In order to eliminate customer concerns and give end customers more quality assurance, let’s see how to guarantee the compatibility of the optical transceiver?
In fact, the compatibility of optical modules means that whether modules can be used on a certain brand of switches. To verify their compatibility, switches play an important role in testing.
Different compatibility needs to be tested through different brands of switches, for example:
SFP+ LR — 10G SFP+ 1310nm MM 10KM LC DDM Cisco compatible, the optical module needs to be tested on the CISCO switch.
Our products will be strictly compatibility and other tests, you don’t need to worry about the quality.
Hope these sharing will be helpful for you! Fighting together!

Do you know about PON optical transceiver

The PON optical transceiver is a high performance optical module for the PON system, also known as the PON module, conforms to the ITU-T G.984.2 standard and the MSA. It uses different wavelengths to send and receive signals between the OLT (optical line terminal) and the ONT (optical network terminal).
Classification of PON optical modules:
1. According to the package type: SFF/SFP/SFP+ and XFP optical modules
2. According to plug-in devices: OLT optical module and ONU optical module
3. According to technical standards: GPON (Gigabit passive optical network) optical module and EPON (Ethernet passive optical network) optical module
The features of PON optical module
The transmission protocol of PON optical module are APON (ATM PON), BPON (broadband passive optical network), EPON and GPON, and now widely used are EPON and GPON;
The operating temperature is 0°C-70°C or -20°C-70°C;
1310/1490 burst mode transmitter and continuous mode receiver(ONU)
1490/1310 continuous mode transmitter and burst mode receiver(OLT);
Transmission distance up to 10km or 20km;
The interface type is duplex SC or SC/APC;
Can avoid the electromagnetic interference and lightning influence of the external equipment;
Reduce line and external equipment failure rate, improve system reliability, while reducing maintenance costs.

Optical transceiver VS media converter

In the optical communications field, many devices have similar functions, such as optical transceivers and media converter, they are the equipment for photoelectric conversion. Do you know their differences?Let’s learn about this.
What is media converter?
Optical media converter is a medium for converting short distance electrical signals and long distance optical signals. It is also called photoelectric converter in many places and is generally used in long distance transmission. Optical transceiver is a cost-effective solution, it does not require a lot of manpower, material resources and time to complete the network upgrade.
The optical module consists of optoelectronic devices, functional circuits and optical interfaces, optoelectronic devices include transmitting and receiving. Simply speaking, the function of an optical module is photoelectric conversion. The transmitter converts an electrical signal into an optical signal and the receiving end converts the optical signal into an electrical signal after transmitting through an optical fiber. The principle is the same as the media converter, but it is more efficient and safer than the media converter.
According to the definition of optical module, as long as there is optical signal, there will be the application of optical module.
How can the optical module be used in conjunction with the media converter?
The wavelength and transmission distance must be the same, for example, using 1310nm wavelength, the transmission distance should be 10KM/20KM.
Optical fiber pigtail interface selection should be paid attention, used in generally media converter uses SC port, optical module uses LC port.
The data rate must be the same, Gigabit media converter corresponding to 1.25G optical module, megabit connect megabit, gigabit connect gigabit.
The optical module types must be the same.

The types and standards of 100G optical module

With the growing demands for bandwidth that makes 100G network developed rapidly. 100G optical module is to be an important part of 100G network, and now many standards and form factors has been emerged on the market. Here we will introduce the related knowledge about 100G optical module in detail.
The types and standards of 100G optical module
According to different form factor, 100G optical module can mainly be divided into CFP／CFP2／CFP4、CXP and QSFP28. Among them, CFP／CFP2／CFP4 and CXP is the early form factor of 100G optical module, but QSFP28 is the new-generation form factor of 100G optical module, which is become the mainstream form factor of 100G optical module now. The principle of 100G QSFP28 optical module is similar to 40G QSFP+’s which adopts the way of 4 x 25 Gbps to transmit 100G optical signal.
CXP optical module
The transmission rate of CXP optical module can reach 12 x 10Gbps, supports hot-pluggable, is the supplement of CFP optical module in the Ethernet data center. The size of CXP is larger than XFP and CFP optical module, and it can provide high-density network interface. CXP is mainly designed for high-speed computer application.
The volume of CFP series optical module is getting smaller, the width of the CFP4 optical module is half of the CFP2’s, and the width of the CFP2 optical module is half of the CFP’s, they all can meet the needs of 40G and 100G network transmission that support 100Gbps data transmission, but CFP4 is more suitable for high-density network application.
QSFP28 optical module
As a 100G optical module with small size, QSFP28 optical module has also been more and more popular. Compared with CFP4 optical module, QSFP28 is only smaller than CFP4. Although QSFP28 has a better performance on density than CFP4’s, the higher power consumption of the CFP4 optical module gives it an advantage over longer distances of optical transmission.
The standards of 100G optical module
Since the advent of the 100G network, IEEE, Multi-Source Agreement (MSA) etc. had proposed multiple standards that designed to 100G optical module. Among these standards, PSM4 and CWDM4 standard which made by MSA industry organization is more suitable for 100G QSFP28 optical module on the market. The following table shows the details of 100G optical module standard.
The release of 100G PSM4 standard is mainly used to decrease the cost of 100GBASE-LR4 optical module, 100G PSM4 is the single-mode parallel 4-channels optical module, which is mainly applied to 500m application situation in the data center. 100G CWDM4 standard is mainly for 2km 100G link deployment and development in the data center. The interface of 100G CWDM4 optical module complied with the standard of duplex single mode fiber 2km 100G interface which transmission distance up to of 2km.