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Cheer Chen

Cheer Chen

The Introduction of Optical Power Meter. OPTICAL SOLUTION ON MY BLOG. MTP technology with multi-fiber connectors offers ideal conditions for setting up high-performance data networks in data centers to handle future requirements.


This technology makes scaling and migration to network operation with 40/100 Gigabit Ethernet easier and more efficient. There are many MTP products in the market now, such as MTP fiber cables, MTP connectors, MTP cassettes and MTP adapters. Fiber Optic Enclosures In Cabling Systems. The Latest Generation of PON – NG-PON2. To meet the large demand for high capacity transmission in optical access systems, 10G-PON (10G Passive Optical Network) has already been standardized by IEEE (Institute of Electrical and Electronics Engineers) and ITU (International Telecommunication Union).

The Latest Generation of PON – NG-PON2

To enable the development of future optical access systems, the most recent version of PON known as NG-PON2 (Next-Generation Passive Optical Network 2) was approved recently, which provides a total throughput of 40 Gbps downstream and 10 Gbps upstream over a single fiber distributed to connected premises. The migration from GPON to 10G-PON and NG-PON2 is the maturity of technology and the need for higher bandwidth.

This article will introduce the NG-PON2 technology to you. Splicing enclosures and Cable terminations. The splicing trays are not designed to be left in the open environment and must be placed in some type of enclosure.

Splicing enclosures and Cable terminations

The enclosure that is used will depend on the application. The following are examples of some enclosures used for splicing trays. ●Direct buried cylinders: At an intermediate point where two cables are joined to continue a cable run, the splices can be directly buried by placing the splice trays in a tightly sealed cylindrical enclosure that is generally made from heavy duty plastic or aluminum. The container is completely sealed from moisture ingress and contains deiccant packs to remove any moisture that may get in. A typical direct buried cylinder is illustrated in Figure 1. How Will Fiber Optic Transceivers Evolve for Future Data Centers. In the modern data center, fiber optic transceivers always play an important role.

How Will Fiber Optic Transceivers Evolve for Future Data Centers

And their importance will continue to grow in the following years because server access and switch-to-switch interconnects require increasingly higher speeds to meet the rising demands for bandwidth driven by streaming video, cloud computing and storage, or application virtualization. So, what challenges were introduced by data center applications on them? From O to L: The Evolution of Optical Wavelength Bands. In optical fiber communications system, several transmission bands have been defined and standardized, from the original O-band to the U/XL-band.

From O to L: The Evolution of Optical Wavelength Bands

The E- and U/XL-bands have typically been avoided because they have high transmission loss regions. The E-band represents the water peak region, while the U/XL-band resides at the very end of the transmission window for silica glass. Intercity and metro ring fiber already carry signals on multiple wavelengths to increase bandwidth. Fibers entering the home will soon do the same.

Now there are several types of optical telecom systems have been developed, some based on time division multiplexing (TDM) and others on wavelength division multiplexing (WDM), either dense wavelength division multiplexing (DWDM) or coarse wavelength division multiplexing (CWDM). Dense Wavelength Division Multiplexing DWDM systems were developed to deal with the rising bandwidth needs of backbone optical networks. Things You Should Know About Ribbon Optical Cable. Local area network (LAN) campus and building backbones, as well as data center backbones, are migrating to higher cabled fiber counts to meet increasing system bandwidth needs.

Things You Should Know About Ribbon Optical Cable

Ribbon optical cables are now being deployed to meet this need, as they provide the highest fiber density relative to cable size, maximize utilization of pathway and spaces and facilitate ease of termination. This article may provide some knowledge of ribbon optical cable. Ribbon Optical Cable Design Ribbon optical cable is now being widely used in campus, building and data center backbone applications where fiber counts of more than 24 are required. This kind of cable offers robust performance equivalent to the stranded loose tube cable. Differences Between 40G QSFP LRL4 and PLRL4 Modules. Data centers regularly undertake their own great migration, to ever-higher-speed networks.

Differences Between 40G QSFP LRL4 and PLRL4 Modules

Since IEEE 802.3ba Ethernet standard introduced the 40 Gigabit Ethernet in 2010, 40G has been an unstoppable tendency in the future. At present, QSFP, CXP and CFP are three 40G transceiver module options. Among QSFP is the most common one. Knowledge of SFP Auto-Negotiation. We usually see fiber optic transceiver with descriptions like “10/100/1000 copper SFP” shown in the picture below.

Knowledge of SFP Auto-Negotiation

Then what does “10/100/1000” mean? In fact, it refers to SFP modules that support 10/100/1000 auto-negotiation. With the function of auto-negotiation, SFP can operate on 10 Mbps, 100 Mbps, and 1000 Mbps. Some knowledge of SFP auto-negotiation will be given in this article. What’s the Difference Between UPC and APC Connectors? We usually hear about descriptions like “LC/UPC multimode duplex fiber optic patch cable”, or “ST/APC single-mode simplex fiber optic jumper”.

What’s the Difference Between UPC and APC Connectors?

What do these words UPC and APC mean? What’s the difference between them? This article may give some explanations to you. What’s the Meaning of UPC and APC? As we know, fiber optic cable assemblies are mainly with connectors and cables, so the fiber cable assembly name is related to the connector name. Whenever a connector is installed on the end of fiber, loss is incurred. Three Types Physical Media Systems For 10 Gigabit Ethernet. Overview Dramatic growth in data center throughput has led to the increasing usage and demand for higher-performance servers, storage and interconnects.

Three Types Physical Media Systems For 10 Gigabit Ethernet

As a result, we are seeing the expansion of higher speed Ethernet solutions, specifically 10 and 40 gigabit Ethernet. Are there any differences between LX, LH and LX/LH? We usually see LX SFP, LH SFP and LX/LH SFP on many websites, and many people show their confusion about them. Whether they are the same or different? If they are dissimilar, what differences between them on earth? The Commonly Used 1000BASE-X Standards about Ethernet Ethernet was the result of the research done at Xerox PARC in the early 1970s. Ethernet later evolved into a widely implemented physical and link layer protocol.

Fast Ethernet increased speed from 10 to 100 megabits per second (Mbit/s). Erbium Doped Fiber Amplifier (EDFA) Used in WDM System. The capacity of fiber optical communication systems has undergone enormous growth during the last few years in response to huge capacity demand for data transmission. Understanding Wavelengths in Fiber Optics. Although fiber optics is full of jargon, it’s important to understand it. In terms of many people, the most confusing one may be the “wavelength.” In fact, light is defined by its wavelength. It is a member of the frequency spectrum, and each frequency (sometimes also called color) of light has a wavelength associated with it.

Wavelength and frequency are related. Generally, the radiation of shorter wavelengths are identified by their wavelengths, while the longer wavelengths are identified by their frequency. The light we are most familiar with is surely the light we can see. Do You Know About Mode Conditioning Patch Cord? The great demand for increased bandwidth has prompted the release of the 802.3z standard (IEEE) for Gigabit Ethernet over optical fiber. As we all know, 1000BASE-LX transceiver modules can only operate on single-mode fibers.

However, this may pose a problem if an existing fiber network utilizes multimode fiber. When a single-mode fiber is launched into a multimode fiber, a phenomenon known as Differential Mode Delay (DMD) will appear. This effect can cause multiple signals to be generated which may confuse the receiver and produce errors.