March 11, 2015: GSA, the Global mobile Suppliers Association, has underlined the accelerating pace of development of LTE around the world by confirming that LTE subscriptions are growing faster than any other mobile communications system technology, and by a substantial margin. Referring to newly-released data provided by Ovum Ltd, GSA calculated that 4G LTE subscription […]
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DWDM Disadvantages and DWDM Advantages
DWDM Advantages and DWDM Disadvantages Breif introduction about DWDM Fiber with great capacity of bandwidth for long haul back bone data transmission. and DWDM, which is short for Dense Wavelength Division Multiplexing. is one of the dominant technology used to utilize the application of fiber cable. It means multiplex a group of wavelengths into and […]
WDM-PON Technology
WDM-PON Technology A typical wavelength division multiplexing PON (WDM-PON) architecture is shown in Figure 4-1. The wavelength division MUX/DEMUX is employed in the ODN. In the example in Figure 4-1, array waveguide gratings (AWGs) are used to MUX and DEMUX wavelengths to or from ONUs. Signal transmission in WDM-PON is similar to that in the […]
40G, 100G, 400G is not far
Is it possible to think of something without knowing a word to describe it ? According to some studies, humans understand the concept of numbers and counting before knowing the words for those numbers. Perhaps that means that this month’s blog will be easier for everyone to understand, since I’ve found that it’s hard to […]
Optical Fiber FAQ
Optical Fiber FAQ (Frequent Asked Question) Optical Fiber FAQ 1: What is optical fiber? A: Optical fiber is a glass or plastic filament that guides a light wave along its path. In another terms, fiber optics is a medium for carrying information from one point to another in the form of light. Unlike the copper […]
Fusion Splicing FAQ
Fusion Splicing FAQ, Updating Fusion Splicing FAQ 1: What is Fiber Splicing? A: Fiber Splicing is used to permanently join two optical fibers where no additional changes are expected to be made to those fibers at that juncture. This is in contrast to connectors, which are designed to allow quick re-configuration of fiber links. There […]
GPON GEPON Comprehensive Comparison
Initial PON (1990s) were based on ATM framing (APON, BPON), ATM-based BPON were inefficient, majority of traffic through the access network was IP traffic, Ethernet based PON (EPON), QOS-aware Gigabit Ethernet (GbE) (VLANs, prioritization, OAM) and integration with other Ethernet equipment, Gigabit-capable Passive Optical Network (GPON) proposed by FSAN members (Quantum Bridge et. al) – […]
OTDR FAQ – 1
OTDR FAQ Gathering AFL Global OTDR FAQ OTDR FAQ 1: When do I need to use a launch cord (cable) with my OTDR? A: A launch cord ‘moves’ the effects of the OTDR’s own front panel connection away from the first connection in the link under test. This allows the OTDR to measure the loss […]
OTDR used in Fiber Optic Network Acceptance testing – 2
OTDR used in fiber network acceptance test We will use the manual method of OTDR operation. Start the OTDR and select the correct wavelength and refractive index for the test. Set the OTDR’s measurement mode to “Two Point Attenuation”. In this mode, the OTDR allows you to set markers at any two points on the backscatter […]
OTDR used in Fiber Optic Network Acceptance testing – 1
OTDR used in Fiber Optic Acceptance testing – 1 Fiber optic acceptance testing ensures that any new cable matches the optical and physical requirements of the planned application. This testing should be performed upon delivery of the cable, prior to its installation. It is important that the operator knows the specifications in order to properly […]