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Jessie2017's Posts

100G QSFP28 Optical Transceivers: A Cost-effective Solution

posted by Jessie2017 7 days ago
tags: Optical Transceivers

The continuous and rapid development of the Internet as well as the desire of people for higher speed optical networks facilitated the vigorous development of the entire optical communications industry and strongly promoted the independent R & D and innovation in many core technologies including optoelectronic devices technologies. 100g optical transceiver is regarded as the product of this big data era.

The first generation of 100G optical modules is CFP optical module with very large volume, then CFP2 and CFP4 optical modules appears. CFP4 optical module is the latest generation of 100G optical module, the width is only 1/4 of CFP optical module. Its package size is not same as the QSFP + optical module. The QSFP28 optical module has a smaller package size than the CFP4 optical module, which means the QSFP28 optical module has a higher port density on the switch. The following are several 100G QSFP28 series optical modules:

Main Types of QSFP28 Optical Transceivers

100G QSFP28 LR4

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A Deep Analysis on CWDM Optical Modules

posted by Jessie2017 10 days ago
tags: cwdm

CWDM optical module adopts CWDM technology, which can combine optical signals with different wavelengths through an external wavelength division multiplexer. It saves fiber resources by transmitting through one optical fiber. At the same time, the receiving end needs to use the wave-demultiplexer to decompose the complex optical signal. In addition, CWDM optical modules can be plugged into switch or router SFP ports. This article will describe in detail what CWDM optical modules are and what are the differences between CWDM optical modules and other modules.

The Main Form Factors and Type of CWDM Optical Modules

There are three types of CWDM optical module form factors: SFP, SFP + and XFP. The transmission distance is generally as follows: 40KM, 80KM, 100KM, and 120KM.

CWDM optical modules can be divided into: CWDM SFP optical module, CWDM GBIC optical module, CWDM SFP + optical module, CWDM XFP optical module, CWDM X2 optical module, CWDMXENPAK optical module and CWDM LX-4 optical

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The Reasons and Impacts of High or Low Temperature on Optical Transceivers

posted by Jessie2017 14 days ago
tags: optical transceiver

The working temperature of optical transceivers affects all the parameters of optical transceivers. If the ambient temperature of the optical transceiver changes, the operating current of the optical transceiver will vary with temperature. At the same time, the parameters of the optical transceivers change, which affects the normal transmission of optical transceivers. Today, we mainly talk about the causes of too high or too low temperature on optical transceivers and its impact.

What Is the Normal Temperature of Optical transceivers?

Because the type and brand of the optical transceiver are complicated, the temperature of modules corresponding to different optical transceiver temperature levels are different and the temperature specifications defined by the supplier are different, whether the temperature of optical transceivers is abnormal or not needs to be considered according to these factors. Before we use the optical transceiver, it is best to check the vendor's definition of

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100G Optical Transceivers: All You Want to Know Is Here

posted by Jessie2017 14 days ago
tags: optical transceiver

With the development of science and technology, the application of optical communications products in real life is becoming more and more widespread. The demand for network technology is also getting higher and higher. Therefore, 100G optical transceivers are gradually appearing on the market. The development of 5G and Data Center further make the 100G optical transceivers become the mainstream of the optical transceiver market gradually. Perhaps you have had a certain understanding of 100G optical transceivers, but if we analysis 100G optical transceivers from another point of view, you will find something different.

Development Background of 100G Optical Transceivers

For the earliest developed 100G optical transceiver, the form factor is CFP, developed in 2010. At that time, IEEE launched 100G optical transceiver SR10, LR4 and ER4 three standards, separately aiming at the 100m, 10Km and 40Km transmission. Followed by that, the IEEE standard added the new 100G SR4 project, but in 20

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What Is CFP and CFP MSA?

posted by Jessie2017 17 days ago
tags: cfp cfp2 cfp4

100G optical module is an important part of the high-speed optical transmission network. Some people say that the optical module has the status of a vice commander in the entire communication system. The rapid development of optical fiber network, people in the communication industry are obvious to al. 100G optical module is regarded as the mainstay of the 5G network, the market has to tell all of us with the truth that the optical module has changed the original market structure.


Speaking of 100G optical module standards and types, the market mainstream models are mainly CFP / CFP2 / CFP4 and QSFP28. As an early appeared optical module, CFP is now gradually replaced by QSFP28. But the basic principle of the optical module has not changed, and we still can learn it to understand the 100G optical module. Today we will talk about what CFP is and the 100G CFP multi-source agreement (MSA).

What Is CFP Optical Transceiver?

Designed primarily for the 100G market, the CFP optical transc

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100G Optical Transceivers: Do You Know?

posted by Jessie2017 20 days ago
tags: optical transceiver 100g

As we all know, 100G is the future trend of network development. For the 100G optical transceivers market, the demand for 100G CFP optical transceivers in the telecom market in 2017 has increased by several times in the past year, and the follow-up demand for 100G optical transceiver solutions will also continue to increase. Before deciding to design a product or purchasing a 100G optical transceiver, you should understand the type and characteristics of the 100G optical transceivers to be able to make better judgments and choices. Here we will provide a comprehensive introduction about 100G optical transceivers for all of you.

100G Standard Introduction

100G interface standards include: SR4 (Short Reach), SR10, LR4 (Long Reach), ER4, ZR4; Among them, all the standard electrical signals are 1010G, For LR4 and ER4, the external optical signal is 425G. In addition, SR4 and SR10 are mainly used for short-distance transmission. The transmission distance does not exceed 100M. LR4, ER4 and

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The Key Technology for 100G CFP/CFP2 LR4 Optical Transceiver

posted by Jessie2017 20 days ago
tags: optical transceiver cfp cfp2

The form factors of 100G CFP optical modules can be divided into CFP/CFP2/CFP4, and they can be divided into 100GBASE-SR10, 100GBASE-LR4, and 100GBASE-ER4 according to the transmission distance. All optical module transmission distance is decided by the optical output signal OSNR tolerance and chromatic dispersion tolerance decision. Generally speaking, it is determined by the laser and its drive performance.

At present, there are two types of optical modulation methods for implementing CFP 100GBASE-LR4 transmission in the mainstream market. One is a Direct Modulation Laser Modulation (DML) mode, that is, a direct modulation laser. And another one is an Electlro -Modulation Modulation (EML) mode, that is, modulation laser.

The following post will briefly introduce some key technical points of using the TEC circuit and EML modulation mode to realize the 100G CFP / CFP2 LR4 optical transceivers.

1. TEC Circuit

EML lasers need to work at a certain wavelength, the temperature jump will

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QSFP28 PSM4, QSFP28 SR4 and QSFP28 LR4: Which One to Choose

posted by Jessie2017 26 days ago
tags: qsfp28 optical transceivers

The appearance of QSFP28 optical transceivers is the same as that of 40G QSFP + optical transceivers. The difference is that QSFP28 optical transceiver can transmit optical signals up to 100G. Therefore, QSFP28 optical transceivers have become the mainstream of 100G optical transceivers and are the preferred solution for 100G network upgrade. There are mainly four kinds of popular QSFP28 optical transceiver modules: QSFP28 SR4, QSFP28 LR4, QSFP28 CWDM4 and QSFP28 PSM4. In this article, we will focus on describing the differences between QSFP28 PSM4 optical transceiver, QSFP28 SR4 optical transceiver, and QSFP28 LR4 optical transceiver. 


Difference between QSFP28 PSM4, QSFP28 SR4 and QSFP28 LR 1. Different Transmission Methods

As we all know, QSFP28 optical transceivers usually have four transmission channels, and each channel data rate is 25Gbp. This transmission method is very similar with 40G QSFP+ optical transceiver transmissions. QSFP28 SR4 optical transceiver and QSFP28 PSM

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Advantages of 100G CFP4 Optical Transceivers

posted by Jessie2017 27 days ago
tags: Optical Transceivers

With the network market gradually develop from 10G to 40G and 100G, 40G/100G optical devices are also widely used in various fields. In the next few years, 100G products will continue to be popularized and gradually accepted by the market. 100G CFP series optical transceivers are available in three different package sizes: CFP, CFP2, CFP4 optical transceivers.

The 100G CFP optical transceiver is also known as 100G client module, which is a form factor pluggable module that supports hot plugging. CFP series of optical transceivers from the launch to now experienced a total of CFP, CFP2 development, and now, CFP4 optical transceiver has been successfully introduced and widely acclaimed. 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 talk about it in th

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100G Ethernet Will Push the Development of 400G

posted by Jessie2017 27 days ago
tags: 100g ethernet 400g 100g qsfp28

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 reduc

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