Fiber Optical Communication

نوشته شده توسط : Katherine Wang Introduction to Optical Transponder Optical transponder is also referred to as WDM transponder, wavelength-converting transponder or OEO (Optical-Electrical-Optical) 3R (re-timing, re-shaping, and re-amplifying) converter, and the word “transponder” is named according to the combination between transmitter and responder. It is an important unit in WDM syst, ...ادامه مطلب

نوشته شده توسط : Katherine Wang Introduction to Optical Transponder Optical transponder is also referred to as WDM transponder, wavelength-converting transponder or OEO (Optical-Electrical-Optical) 3R (re-timing, re-shaping, and re-amplifying) converter, and the word “transponder” is named according to the combination between transmitter and responder. It is an important unit in WDM syst, ...ادامه مطلب

نوشته شده توسط : Katherine Wang Introduction to Optical Transponder Optical transponder is also referred to as WDM transponder, wavelength-converting transponder or OEO (Optical-Electrical-Optical) 3R (re-timing, re-shaping, and re-amplifying) converter, and the word “transponder” is named according to the combination between transmitter and responder. It is an important unit in WDM syst, ...ادامه مطلب

نوشته شده توسط : Katherine Wang Introduction to Optical Transponder Optical transponder is also referred to as WDM transponder, wavelength-converting transponder or OEO (Optical-Electrical-Optical) 3R (re-timing, re-shaping, and re-amplifying) converter, and the word “transponder” is named according to the combination between transmitter and responder. It is an important unit in WDM syst, ...ادامه مطلب

Whatrsquo;s CWDM Technology? CWDM, also referred to as coarse wavelength division multiplexing, is a kind of WDM technology that uses different wavelengths to multiplex two or more optical signals and carry them together via a single optical fiber, aiming at enhancing the network performance. Instea, ...ادامه مطلب

As the optical network develops fast, todayrsquo;s network needs much higher capacity than ever before, for carrying the large amount of data. Under this trend, the DWDM technology is come up with that can greatly expand the network capacity in long haul transmission. For those capacity-hungry appli, ...ادامه مطلب

When choosing fiber transceiver, you may usually hear the description like Tx (transmit) power and Rx (receive) power for a fiber transceiver. Do you know what do these two phrases stand for? If we want to choose a proper kind of fiber transceiver, do we have high requirements on its Tx power and Rx, ...ادامه مطلب

As we know, the 10G SFP+ interface offers the highest density, lowest cost and lowest power 10 Gigabit Etheet solution, while the SFP+ transceiver is published and available for achieving the migration from 1G to 10G network. However, if the mass 10G migration is required, the total cost for SFP+ fiber optical solution is still high. In order to reduce the cost for 10G migration, experts come up with the SFP+ twinax direct attach cable solution for 10G short distance transmission as a ideal cost effective alteative to the fiber optical solution. In this paper, it will mainly talk about the SFP+ twinax direct attach cable, which may be useful for you to deploy a 10G short distance transmission in a cost effective manner. Whatrsquo;s the SFP+ Twinax Direct Attach Cable? SFP+ twinax direct attach cable, also referred to as SFP+ DAC or 10G twinax cable, is a copper interconnect using a twinax cable assembly that connects directly into an SFP+ housing, designed for 10G short distance tr, ...ادامه مطلب

With the growing network requirements for higher network speed, greater scalability, higher performance and reliability, 40G network gradually becomes a better choice for most data centers. Under this condition, the 40G QSFP+ copper direct attach cable(DAC) came into market, which is designed for delivering an aggregate data bandwidth of 40Gb/s in a short distance and high density cabling interconnect system. As a highly cost-effective solution for 40G to 40G or 10G to 40G connection, there is no doubt that the QSFP DAC twinax cableplays an important role in 40G cabling for better meeting the increasing requirements. QSFP DAC Twinax Cable Overview QSFP DAC twinax cable is also referred to as QSFP+ copper direct attach cable or QSFP copper cable, used for connecting switch to switch or switch to sever. It can be simply divided into three types, QSFP+ to QSFP+ direct attach copper cable, QSFP+ to 4 SFP+ direct attach breakout copper cable and QSFP+ to 4 XFP breakout copper cable. Since t, ...ادامه مطلب

When choosing QSFP+ transceivers for designing 40G Etheet network, you may hear the descriptions like ldquo;Single-mode QSFP+rdquo;, ldquo;Multimode QSFP+rdquo;. Are you familiar with these modules? What do these words stand for? Whatrsquo;s the difference between these two QSFP+ modules? Which one should you choose to deploy your 40G Etheet network? And what should be noticed when using them? In fact, the words single-mode and multimode here mean the different types of optical fibers that QSFP+ transceivers work with. For instance, single-mode QSFP+ means that QSFP+ transceivers run through single-mode fibers (SMF), while multimode QSFP+ will work with multimode fibers (MMF). In this article, we will have a discussion about the differences between the two QSFP+ transceivers and introduce the notice when using them. Single-mode QSFP+ Overview Generally, single-mode QSFP+ transceivers mainly work in 1310nm wavelength, mostly applied for 40G long distances transmission, such as, 1km,, ...ادامه مطلب

Since data centers have been experiencing an great infrastructure change to achieve higher levels of performance and scalability, the demand for 100G Etheet network increases day by day. To better accommodate this great change, there are several kinds of transceivers designed for deploying 100G Etheet network, such as, CFP, CFP2, CFP4, QSFP28, CPAK, etc. Among these 100G optics, QSFP28 transceiver offers the optimal solution for the 100G migration with the lowest power consumption which is very commonly used at present. In this paper, it will introduce QSFP28 transceiver and analyze the reason why QSFP28 transceiver is so popular in 100G Etheet network. QSFP28 Transceiver Overview As the smallest 100G form factor transceiver, QSFP28 transceiver has the same size and lane number as 40G QSFP+ transceiver, which is implemented with four 25-Gbps lanes to achieve 100G transmission. With the design of an upgraded electrical interface, it is able to support signals rates up to 28 Gbit/s, ...ادامه مطلب

Nowadays, there is a widespread conce over the migration from traditional 10G to 40/100G Etheet network, which seems to be an irreversible trend. As we know, 40/100G Etheet network can greatly address the problem of very low network speed. Do you also consider upgrading your system for higher bandwidth and larger capacity? There is no doubt that fiber cables must be the first choice for a smooth 40/100G migration, which almost makes copper cables obsolete. But which kind of fiber should be chosen? Is there any key notice should be taken into consideration when selecting fiber for the migration? These problems will be explored and answered in the following parts. Which Fiber Type Should Be Chosen for 40/100G Migration? It is reported that over 80% of data centers support their network within 100 meters in recent years. Thatrsquo;s to say, if the fiber has the ability to transmit 40/100G signal for a short distance, it almost satisfies the needs for migration. In general, there are, ...ادامه مطلب

With the continuously growing demand for higher capacity and bandwidth, the deployment of 40G Etheet network becomes much more necessary than ever before. As one of the key components to accomplish a whole 40G connection, QSFP+ transceiver, a compact, hot-pluggable module, is designed with four independent channels to transmit and receive 10G signals, supporting 4x10 Gbit/s data rates. This kind of module can be used both in 40G to 40G application where one QSFP+ transceiver will be connected to another QSFP+ transceiver and in 10G to 40G application where one QSFP+ transceiver will be connected to four SFP+ transceivers. Do you also want to upgrade your system from 10G to 40G Etheet network by using QSFP+ transceiver? The following will detailedly describe the step-by-step procedures for installing QSFP+ transceiver and attaching optical network cable to the transceiver, which will be helpful for you to achieve a fast, smooth and seamless 40G network deployment. QSFP+ Transceiver , ...ادامه مطلب

As we know, duplex LC interfaces are widely used in 10G SFP modules, for instance, SFP-10G-LR-S module and SFP-10G-SR module, which occupy the majority of 10G module market. However, for 40G QSFP+ modules, both LC interface and MTP/MPO interface play important roles in meeting the high speed transmission, which are available on 40G QSFP module market. What are the differences between these two interface types? Which one should be chosen when deploying 40G Etheet network? Do they function similarly in the same application? Letrsquo;s talk about this topics and find one kind of 40G QSFP+ module with the most suitable interface type so as to make a smooth 40G connection for our network. Differences Between LC Interface and MTP/MPO Interface From the following figure, we can see the examples of QSFP+ modules with two different interfaces. The left one is the module with with LC interface, while the right one is with MTP/MPO interface. The differences between these two kinds of modules va, ...ادامه مطلب

As we all now, fiber optic cable jumper plays an important role in Etheet network connection, which becomes more and more diversified to satisfy the different connection requirements in recent years. For instance, standard fiber patch cable like single mode patch cable and multimode patch cable, special fiber patch cable like mode conditioning patch cable and bend insensitive patch cable, etc. Among these various fiber patch cables, mode conditioning patch cable has been one of the most popularly used fiber patch cable due to its unique features and advantages, which will be introduced in the following text. What Is Mode Conditioning Fiber Patch Cable? Mode conditioning patch cable is a special kind of duplex fiber patch cable that consists of two fibers, a conditioned fiber and a non-conditioned fiber, capped at either end with connectors. In the conditioned fiber, a single mode fiber and a multimode fiber are fusion spliced in an offset manner, with a precise core alignment and ang, ...ادامه مطلب