Tag: WDM

Webinar: Overcoming the challenges of testing DWDM channels

Wavelength division multiplexing (WDM) is the best way to increase efficiency and data density but it requires a new level of testing. Every connector, splice, MUX, DEMUX must be tested using the appropriate wavelengths and correct colored transceiver TX is received at the proper level on the RX side. When a DWDM is half full it is hard to troubleshoot with legacy test equipment which is why inline DWDM OTDR/iOLM channel testing is required.

400Gbps data transmission achieved over DCI in a 75 GHz DWDM channel

NeoPhotonics achieved two milestones using its interoperable pluggable 400ZR coherent modules and its specially designed athermal arrayed waveguide grating (AWG) multiplexers (MUX) and de-multiplexers (DMUX). First, data rate per channel increases from today’s non-interoperable 100Gbps direct-detect transceivers to 400Gbps interoperable coherent 400ZR modules.Second, the current DWDM infrastructure can be increased from 32 channels of 100 GHz-spaced DWDM signals to 64 channels of 75 GHz-spaced DWDM signals.

Wavelength-Division Multiplexing (WDM)

WDM is an abbreviation for Wavelength-Division Multiplexing, and is now one of the most widely used technology for high-capacity optical communication systems. At the transmitter side, multiple optical transmitters – each emitting at a different wavelength – individually send signals and these signals are multiplexed by a wavelength multiplexer (MUX). The multiplexed signals are then transmitted over one main transmission line (optical fiber cable). At the receiver side, the signals are de-multiplexed by a wavelength de-multiplexer (DEMUX) and sent to multiple receivers.

All Fiber Roads Divisible by 2 and 8

By now you’ve probably heard of 8-fiber MPO plug and play solutions available on the market, which are ideal for Gigabit (40GBASE-SR4) and 100 Gigabit (100GBASE-SR4) applications that use 8 fibers with 4 transmitting and 4 receiving at either 10 or 25 Gb/s. Unlike 12-fiber MPO solutions where 4 of the 12 fibers go unused, 8-fiber MPO solutions offer 100% fiber utilization in these applications. When looking ahead to future fiber applications, 8-fiber MPO solutions continue to make the most sense because all future duplex, parallel optic and WDM-based fiber applications are divisible by either 2 or 8 fibers – not 12.

Meet OM5 – The Green Revolution in Fiber Optics Technology!

WBMMF or OM5 is designed to carry multiple signals generated at different short wavelengths. These signals can be aggregated for applications where high bandwidths are required through a technology called wavelength division multiplexing or WDM. In short, OM5 can accommodate multiple wavelength signals and allows them to travel simultaneously across a single fiber strand. In this way, the capacity of a fiber cable can be increased by four times.

Fiber Capacity Mining, Then and Now

Ever since the invention of single mode fiber optic cable decades ago, the industry has continued to develop new ways of increasing the amount of data that can be transmitted over an optical fiber link. Two significant developments have improved fiber utilization: (1) the simultaneous transmission of multiple lasers of different wavelengths over a single fiber — a technique called wavelength division multiplexing (WDM), and (2) coherent transmission using digital signal processors (DSPs) to modulate and detect multi-levels in both phase and amplitude of laser light on two polarizations, resulting in increased spectral efficiency. This white paper reviews the technological advancements that have increased the capacity of information that can be transmitted over a single mode fiber link and discusses how parameters in coherent transmission such as modulation order, baud rate, and transmission shaping determine overall fiber capacity.

EXFO : introduces industry’s first integrated test solution for troubleshooting DWDM networks

EXFO introduces the Optical Wave Expert, the first device to integrate DWDM channel power validation and intelligent OTDR fault-locating capabilities on a single port. Designed to save multiple service operators (MSOs) time and money, the Optical Wave Expert equips field technicians to automatically measure, diagnose and troubleshoot optical fiber links.

Understanding Wavelength Division Multiplexing

One of the leading technologies allowing network operators to increase network density while leveraging current infrastructure is wavelength-division multiplexers (WDM). Learn what WDM technology involves and why it is critical for the success of next generation bandwidth needs. We’ll tackle some of the questions on how they work, the physical components needed to be successful, and best usages in the telecommunications industry. We’ll also take a few minutes to review where in the networks WDM devices are most commonly found.