To best describe DWDM (coarse wavelength division multiplexing) and DWDM (dense wavelength division multiplexing)‚ you must first understand how WDM (wavelength division multiplexing) operates. WDM is multiplexing several optical signals on a single fibre by using wavelengths which are essentially colours of the laser light; to transmit different signals ranging from 2.5Gbps to 40Gbps. The device that connects the signals together is a multiplexor‚ and the one that splits them apart on the other
Premium Optical fiber Light Laser
------------------------------------------------- DENSE WAVELENGTH DIVISION MULTIPLEXIN ------------------------------------------------- Swapnil Salunkhe ------------------------------------------------- DEPARTMENT OF E&TC ------------------------------------------------- R.C.Patel Institute Of Technology ------------------------------------------------- Swapnil2001@gmail.com ------------------------------------------------- ABSTRACT The race for unprecedented bandwidth is on
Premium Optical fiber
DWDM Tutorial Prerequisite Training November 15‚ 2002 DWDM Prerequisite Training Trademarks and Copyrights FNC is a trademark of Fujitsu Network Communications‚ Inc. (FNC). Alcatel is a registered trademark of Alcatel. 6910 TeraLight is a trademark of Alcatel. Corning is a registered trademark of Corning Corporation DS and SMF-28 are trademarks of Corning Corporation DS is a trademark of Corning E-LEAF is a registered trademark of Corning. Lucent is a trademark of Lucent Corporation
Premium Optical fiber Laser
Introduction: Now we are in the twenty first century‚ the era of ‘Information technology’. There is no doubt that information technology has had an exponential growth through the modern telecommunication systems. Particularly‚ optical fiber communication plays a vital role in the development of high quality and high-speed telecommunication systems. Today‚ optical fibers are not only used in telecommunication links but also used in the Internet and Local area networks (LAN) to achieve high signaling
Premium Optical fiber Laser Refractive index
Dense wavelength division multiplexing (DWDM) is a technology that puts data from different sources together on an optical fiber‚ with each signal carried at the same time on its own separate light wavelength. Using DWDM‚ up to 80 (and theoretically more) separate wavelengths or channels of data can be multiplexed into a light stream transmitted on a single optical fiber. Each channel carries a time division multiplexed (TDM) signal. In a system with each channel carrying 2.5 Gbps (billion bits per
Premium Optical fiber Light
1.0 Wavelength-division Multiplexing Technology 1.1 Wavelength-division Multiplexing In fibre optic telecommunications‚ wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fibre by using different wavelengths (colors) of laser light to carry different signals. This allows for a multiplication in capacity‚ in addition to making it possible to perform bidirectional communications over one strand of fiber. (Tomlinson & Lin
Premium Optical fiber
Long-Period Grating ) (LPG). The gain spectrum of an EDFA at a wavelength of ) 1530nm was equalized from 5.2dB peak-to-peak to 2.3dB peak-to-peak. The LPG was fabricated by using an excimer laser and a metal mask. By means of a novel technique that enables one to tune the peak attenuation of the LPG‚ the gain equalizer can operate over a wide range of pump power. Index Terms-Erbium Doped Fiber Amplifier‚ Long-Period Grating‚ Gain Equalization‚ Wavelength-Division Multiplexing. II. EDFA CHARACTERIZATION A
Premium Laser Optical fiber
Effects of Wavelength and Light Intensity on Photosynthetic Activity ABSTRACT The photosynthetic process of eukaryotes revolves around chlorophyll‚ the substance that give plants their green color. Plants convert light energy into chemical energy by means of photosynthesis. This experiment tests the reaction rates of a chloroplast suspension against variables of wavelengths and light intensity. Both a control and an experimental cuvette were exposed to a range of 450 to 750nm of light and varying
Premium
OPTICAL AMPLIFIERS IN OPTICAL COMMUNICATION SYSTEM Arminder kaur1‚ Upneet Kaur2‚ Gaurav soni3 1‚2M.Tech Scholar (ECE)‚ Amritsar College of Engg. &Technology‚ Amritsar‚ Punjab‚ India. 3Associate Professor‚ Deptt. of ECE‚ Amritsar College of Engg. & Technology‚ Amritsar‚ Punjab‚ India. ABSTRACT: This paper reviews several technologies of optical amplifiers with their applications and we focus on the recent progress in some important aspects of several optical fiber amplifier technology
Premium Laser Optical fiber
The Difference between Digital and Analog Signals: Data communication is used every day to deliver data to external devices. Digital and analog signals are both still used for standard phone lines‚ but analog signals are now almost non-existent in households. Today digital signals are definitely more widely used over analog because the amount of people who use cell phones over standard telephones. Analog provides richer quality sound over digital‚ but digital has better clarity. An analog signal
Premium Digital