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- optical transceiver

- Émetteur-récepteur optique haute vitesse Gigalight 100G QSFP28 LR4
- Gigalight Launches Industrial-Grade 100G QSFP28 Optical Transceivers
- Brief Introduction on 25G/50G/100G Ethernet
- Introduction on 5 Kinds of 40G QSFP+ Optical Transceivers
- Comparing 10G SFP+ DAC and 10G SFP+ Transceivers

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 5G Network Brings New Opportunity to Optical Communication Alerter l'administrateur Recommander à un ami Lien de l'article 

Since Ovum released its latest 5G subscriber forecast in December 2016, two major changes have taken place in the 5G market. First and foremost, in March of this year, 3GPP announced the acceleration of the development of some 5G standards to make it possible to standardize on commercial 5G deployments by 2019, one year ahead of the previous deployment schedule. In addition, with the acceleration of the 5G standard set-up, T-Mobile US, one of the major carriers, announced for the first time a nationwide 5G network deployment and the United States will be one of the largest in the world.


At present, 5G is in the crucial stage of the formation of technical standards. Major countries and operators in the world have started the 5G test in succession and successively issued strategic plans to carry out industrial layout and seize strategic high ground. China is also actively promoting the 5G technology research and industrialization, 5G technology research and development testing, international standardization support continue to make new progress. Recently, more than three major operators 5G infrastructure, total spending within seven years will reach 180 billion U.S. dollars heavy news came out, the 5G topic to an unprecedented peak.


As we all know, the future of 5G depends on small base stations. When the coverage of base stations is getting smaller and smaller, the number of base stations will increase exponentially. Taking the example of 3.5GHz, the number of base stations of 3.5GHz is more than the number of base stations of 800MHz and 1.8GHz Doubles. If it is planned more than 6GHz, the number of base stations will be more. If it is planned to 26GHz above, it does not know it will reach how many times. Therefore, a substantial increase in the number of base stations is an inevitable result, and the interconnection between base stations requires a lot of fiber. It is reported that at present, the number of base stations in China has reached more than 5 million, while the future development of 5G, conservative forecasts will reach 10 million or more, if the high-band, or even more.


Obviously, optical communication and 5G have met by chance. Accordingly, what is the impact of 5G on optical communications? The opportunities that 5G brings to optical communication are mainly including three parts: optical fibers, optical transceivers and optical network.


  1. First, optical fiber is the first beneficiary. 5G band is high and the number of base stations may be 2-3 times. If following the full coverage requirements, according to Fiber Broadband Association estimates, 5G fiber usage will be 16 times more than 4G. Consider China's 4G base station density is very high, the urban area only a few hundred meters spacing, it is estimated that the amount of 5G fiber is 4G 2-3 times.


  1. Second, optical transceiver module is the second beneficiary. Assuming that the 5G base station is 2-3 times as much as 4G, considering the medium / backhaul module, it is expected to bring tens of millions of 25GHz high-speed optical module usage. 5G flat architecture to the traditional huge capacity and cost pressures, which requires a large number of optical transceivers to support.


  1. Moreover, high-speed optical access network systems and optical devices are the third beneficiaries. The 5G architecture enables several decades of backhaul / midamble / preamble capacity up to tens of hundreds of Gbps levels and requires the introduction of 25G / 50G based CWDM or WDM for tunable lasers, tunable filters and CWDM / WDM devices High cost performance requirements; for TWDM PON systems, the demand for eCPRI and even edge ROADM systems is likely to increase significantly.


To sum up, we are currently at the pinnacle of opportunities and challenges in the 5G era. As the leading optical communications industry and optical component manufacturer in the 5G era, Gigalight has been closely following the market and moving ahead of 2016 in preparation for the beginning of 5G optical device product lines. At present, Gigalight owns a complete line of professional optical modules and other products. In particular, a large number of high-speed new products are launched in last year: 100G QSFP28 CWDM4, 100G QSFP28 PSM4, and 200G QSFP DD SR8.


  Aucun commentaire | Ecrire un nouveau commentaire Posté le 11-01-2018 à 02h39

 How Much Do You Know About CFP/CFP2/CFP4 Optical Transceivers Alerter l'administrateur Recommander à un ami Lien de l'article 

Because the size of the CFP optical transceiver is too large to meet the high-density requirements of Data Center, the CFP-MSA board defined two new CFP series optical transceivers: CFP2 optical transceiver and CFP4 optical transceiver. Therefore, there are three types of optical transceivers in the 100G CFP series based on different sizes of the form factors. In this article, we are going to talk about CFP / CFP2 / CFP4 in detail.

An Overview of CFP / CFP2 / CFP4

CFP optical transceiver is largest, CFP2 optical transceiver is one half of the CFP, and CFP4 optical transceiver is one quarter of the CFP. The size of these three modules is shown as below. CFP / CFP2 / CFP4 cannot be used interchangeably, but they can be used simultaneously in the same system.

CFP optical transceiver supports transmission on a single-mode and multi-mode fiber at a variety of rates, protocols, and link lengths, including all the physical media dependent (PMD) interfaces included in the IEEE 802.3ba standard. CFP optical transceiver is based on the Small Form Factor Pluggable Optical transceiver (SFP) interface and is larger in size to support 100 Gbps data transmission. CFP optical transceiver can support a single 100G signal, OTU4, one or more 40G signals, OTU3 or STM-256 / OC-768. There are mainly three kinds of 100G CFP optical transceivers: CFP 100GBASE-SR10, CFP 100GBASE-LR4 and CFP 100GBASE-ER4.

100G CFP2 optical transceivers are commonly used as 100G Ethernet interconnects and deliver higher transmission efficiencies than CFP optical transceivers. The smaller size also makes them suitable for higher density cabling. CFP2 100GBASE-SR10, CFP2 100GBASE-LR4 and CFP 2 100GBASE-ER4 are three mostly-used CFP2 optical transceivers in the current market.

Compared with CFP / CFP2 optical transceiver, 100G CFP4 optical transceiver has the same rate but the transmission efficiency has greatly improved. Besides, the power consumption is reduced and the cost is lower than CFP2. CFP4 optical transceiver has irreplaceable advantages. We will discuss it in the second part.

The Advantages of CFP4 Optical Transceiver

1. Higher transmission efficiency: The early 100G CFP optical transceiver, through 10*10G channel, to 100G transmission rate, and now 100G CFP4 optical transceiver through 4*25G channel, 100G transmission, so the transmission efficiency is higher and more stable.

2. Smaller size: CFP4 optical transceiver is one-fourth of the CFP, and is the smallest optical transceiver in the CFP series optical transceiver.

3. Module integration is higher: CFP2 integration is 2 times of CFP, CFP4 integration is four times of CFP.

4. Lower power consumption and cost: CFP4 optical transceiver transmission efficiency has been improved significantly, but the power consumption is decreased and the system cost is lower than CFP2.

In Conclusion:

By learning the above information about 100G CFP / CFP2 / CFP4 optical transceiver, you may have some further understanding about the optical transceiver series. Gigalight not only has variety kinds of 10G/40G/100G/200G optical transceivers, but also provides customers with an online e-commerce platform - inFiberone to meet their needs. More professional tutorials and solutions about optical transceivers and other optical components, you can visit its official website.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 16-01-2018 à 08h42

 Analysis on 100G Optical Transceiver under 5G Network Alerter l'administrateur Recommander à un ami Lien de l'article 

A few years later, 5G will begin to be formally commercial. Does it need to use the optical transceiver? How about its conditions of demand compared with 4G? In fact, 4G have uses the countless optical transceiver, 5G will be more. By the current 5G planning point of view, the rate may reach 10-100 times the 4G network. At this rate, the base station must adopt the optical transceiver to achieve the service function, so the demand of the 5G optical transceiver will far exceed that of the 4G optical transceiver.

According to statistics, the core components of 4G base-stations and 4G transmission equipment are 6G and 10G optical transceivers. Once 4G constructions not only led the advance in the wireless field, but also promoted the development of ancillary industries such as antenna, radio frequency and power supply, the industry is also a new growth driver.

In the optical transceiver, 100G optical transceiver is one of the high frequency words. Even in the sub-industry closely related to the 5G theme investment, the 100G optical transceiver has become a new landmark theme market. Therefore, the post will have a deep analysis on what is 100G optical transceiver.

A Brief Introduction on 100G Optical Transceiver

1. Firstly, we need to know that the 100G "G" refers to the optical signal transmission rate of units, rather than the 5G "G" (Generation, 5th generation mobile communications).

2. Optical transceiver: Optical device is to achieve high-speed conversion between optical signals and an optical device, the optical receiver, optical transmitter, laser, detector and other functional modules.

3. According to the encapsulation type (CFP / XFP / SFP / QSFP, etc.), the transmission rate (155Mbps ~ 200Gbps), optical link (CWDM / DWDM / PSM), mode / Hot swap), optical transceiver has a wide range of categories. If considering the operating temperature range, the number of self-diagnostic functions and performance classification elements, optical transceivers has more categories.

4. The basic structure of an optical transceiver includes a laser (TOSA) + driving circuit, a detector (ROSA) + receiving circuit, a multiplexer (MUX), a demultiplexer (DEMUX), an interface, an auxiliary circuit and a housing.

5. Driven by technological upgrading and cost reduction, the optical transceiver continues to be "high-speed, miniaturized and integrated." 100G optical transceivers using 25G laser chip technology, according to the different form factor methods, 100G optical transceivers have three categories, which are CFP / CFP2 / CFP4, CXP and QSFP28. QSFP28 is a new generation of 100G optical transceiver form factor, and has now become the mainstream optical transceiver form factor in 100G optical transceiver market.

6. 100G optical transceivers have different models and standards. Generally speaking, the transmission rate of optical signals is much higher than that of low-rate 10G and 25G products. Now they have become the star products in large-scale data centers and telecom markets. The following table is the specific circumstances of some common 100G optical transceiver standard:



Connector and Fiber

Cabling Reach



24f MPO, pinned parallel MMF, 10-fiber Tx, 10-fiber Rx 850 nm

100 meters on OM3150 meters on OM4



12f MPO, pinned parallel MMF, 4-fiber Tx, 4-fiber Rx 850 nm

100 meters on OM4



LC receptacles duplex (2) SMF, 1310 nm, 4λx25G WDM

10 kilometers on SMF



12f MPO, pinned parallel MMF, 4-fiber Tx, 4-fiber Rx 850 nm

40 kilometers on SMF

100G PSM4


12f MPO, pinned parallel SMF, 4-fiber Tx, 4-fiber Rx 1310 nm

500 meters on SMF

100G CWDM4


LC receptacles duplex (2) SMF, 1271–1331 nm, 4λx25G CWDM

2 kilometers on SMF

100G SWDM4

SWDM Alliance(preproduction)

LC, receptacles duplex (2) MMF, 850–950 nm, 4λx25G SWDM


100G CLR4

100G CLR4 Alliance

LC receptacles duplex (2) SMF, 1271–1331 nm, 4λx25G CWDM

2 kilometers on SMF



The advent of the 5G era will bring new opportunities for the optical communications industry. The entire industry such as optical fiber, optical transceivers and optical access network systems will benefit from the 5G construction. The world's major optical transceiver manufacturers are now taking this opportunity to launch new 100G optical transceivers to capture the 5G market. Gigalight, as a veteran optical transceiver manufacturer with professional technology, advanced R & D capability and stable manufacturing capability, not only has many popular 100G optical transceiver products, like 100G QSFP28 CWDM4, 100G QSFP28 PSM4, CFP4 100G SR4, and etc. but also will release more new 100G optical transceivers in the first quarter of this year. More information about 100G optical transceivers, please visit the official website.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 18-01-2018 à 06h39

  How to Distinguish CFP and CXP Optical Transceivers Alerter l'administrateur Recommander à un ami Lien de l'article 

Even though CFP and CXP have similar abbreviations and appear almost simultaneously, their form factor is different in size, density and target applications. CFP and CXP form factors are both hot-swappable, support for sending and receiving functions, and support for data rates of 40Gbps and 100Gbps. CFP is mainly targeted at 40G and 100G Ethernet applications, supports single-mode or multimode fiber, and can adapt to a series of data rates, protocols and link lengths. On the contrary, CXP is mainly targeted at the cluster and high-speed computing markets. Therefore, judging from these aspects, CFP and CXP complement each other, not competing. In this article, Gigalight (gigalight.com) will take a look at these two optical transceiver transceivers, and to help you better distinguish them.

What Is CFP Optical Transceiver?

Designed primarily for the 100G market, the CFP optical transceiver is specifically sized for long range interfaces and single-mode fiber applications. It is 120mm long and 86mm wide. It is the same length as a 10G XENPAK optical transceiver but twice as wide. At the same time this optical transceiver has good thermal performance, making it in the process of using small power consumption.     

Gigalight can provide several kinds of mainstream CFP optical transceivers: CFP 100GBASE-SR10, CFP 100GBASE-LR4, CFP2 100GBASE-SR10, CFP2 100GBASE-LR4, and 100GBASE-SR4 CFP4. Beised, it will release the latest 100G CFP2 ER4/100G CFP ER4 in January, 2018. These optical transceivers can achieve different transmission distances by connecting with different types of optical fibers.



Transmission Distance





Dual LC






Dual LC






What Is CXP Optical Transceiver?

CXP optical transceiver is 45 mm long and 27 mm wide and optically larger in size than the XFP optical transceiver. Built-in 12 transmission channels, each channel to 10Gb / s speed, the maximum rate of up to 120G, mainly used to meet the high density of data centers, usually with multi-mode fiber optic ribbon used in parallel, the transmission distance up to 100 meters. The following table will take CXP 100GBASE-SR10 as an example to understand the parameters of this optical transceiver.





Form Factor






Data Rate


Transmission  Distance


Maximum Link Length 

300m on OM3 or 400m on OM4


 What Is the Relationship between CFP and CXP?

There are many similarities and differences between CFP optical transceivers and CXP optical transceivers, and in some cases, there is competition between CFP optical transceivers and CXP optical transceivers because CFP can also be used with multimode optical fibers. The specific depends on the user's choice, if you need to build a network that can adapt to a variety of speeds then use the CFP optical transceiver; if it is mainly used for short-distance transmission, then may need more CXP optical transceiver. CFP and CXP form factors are complementary, CFP is mainly used in Ethernet switches, core routers and optical transmission equipment, and CXP is used in the Data Center market.

No matter which optical transceiver you need, Gigalight can meet your needs. There are also other optical communication products like 100G optical transceivers that can help you solve optical network issues.

  Aucun commentaire | Ecrire un nouveau commentaire Posté le 18-01-2018 à 06h39

 Optical Communication: 100G Ethernet Will Push the Development of 400G Alerter l'administrateur Recommander à un ami Lien de l'article 

The widespread deployment of 100G Ethernet in data centers and networks is driving the demand for 400G solutions and providing a source of funding for 400G device developments. Those suppliers who have successfully developed competing 100G optical modules and components are expanding 100G while developing lower-cost 100G solutions and introducing 25G, 50G, 200G, 400G and 600G products.

The first 100G Ethernet solution was launched in 2010. Since then, 100G shipments have been slow to grow due to the costly optical module and demand constraints. By 2016, the introduction of 100G QSFP28 will significantly reduce the cost of 100G ports and the migration of the super-large data center to the cloud service has brought huge demand.

As a result, 2017 has been proved to be a "Hockey-stick Effect" year of 100G Ethernet and optical module suppliers are struggling to meet market demand. At this stage, the focus of optical modules and device suppliers is to increase 100G capacity and reduce costs to "cash in" from this wave of demand. The ways to reduce costs include innovative module packaging, silicon photonics, smaller form factor modules such as SFP-DD, and fewer channels / wavelengths.

The first 400G optical module for data centers and enterprises is CFP8 form factor and is being commercialized. The next generation will use QSFP-DD or OSFP. The 100G optical transceivers using DP-QPSK coherent receivers have been widely used in data center interconnection, MAN and Toll networks. The enhanced DSP can now achieve 200G with 16QAM modulation, while the next generation can support 400G and 600G with 64QAM modulation. These developments are critical to meeting the bandwidth needs of the data center.

Currently, nearly 30 suppliers offer QSFP28 modules and active optical cable for 100G data centers and enterprise applications. Many suppliers have also introduced SFP28 modules that support 25G Ethernet to server. Some vendors offer 100G CFP/CFP2/CFP4 and CXP modules. The largest shipments of QSFP28 optical modules are QSFP28 PSM4 and QSFP28 CWDM4 for very large data centers and other applications. The first 200G optical module introduced by manufacturers is QSFP56 and PAM4 coded, or QSFP-DD form factor and two 100G ports.

Data Center interconnection, MAN and long haul systems use DSPs integrated into line card modules or pluggable CFP-DCO modules. Most leading telecom system manufacturers have their own DSP designs. Several companies use DSPs integrated on the line card and pluggable CFP2-ACO modules that contain only analog and optical components. This is a key innovation area for vendors developing next-generation 400 / 600G DSP designs, 200G CFP2-DCO modules and 400G modules. OIF is working on a 400-120-km 400ZR interface standard and Ciena licenses three 400-G-coherent DSP chips to three optical module companies (Lumentum, NeoPhotonics and Oclaro).

Coherent transceivers DSP and Gearbox components, PAM4 PHY and CDR components, optical driver / receiver arrays, and packet optical transport platform components are the key to building these optical modules and line cards. Currently, the latest generation of devices uses 16nm CMOS technology, the next generation of DSP is expected to use 7nm technology. The PAM4 PHY and 50G CDRs enable dual wavelength 100G and four wavelength 200G solutions. Next-generation components will support single-wavelength 100G.

The demand for 100G in the data center and other application markets is very strong. As the cost of modules drops and the production capacity gradually increases to meet the demand, the 100G optical module market in 2018 will be highly competitive. At present, the first solution of 200G and 400G is already available. The industry is currently working to reduce 100G costs by developing higher density 400G and 800G and 1.6Tbit / s solutions. All methods are using advanced coding and modulation methods, especially PAM4 for data centers and enterprises, as well as 16 / 64QAM for Data Center interconnection, MAN and Toll networks. These developments require substantial investment by suppliers, which may lead to further consolidation in the industry.


  Aucun commentaire | Ecrire un nouveau commentaire Posté le 23-01-2018 à 08h09

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  Blog créé le 11-01-2018 à 02h33 | Mis à jour le 21-01-2019 à 10h18 | Note : Pas de note