progress bar code in vb.net Single-Mode Fiber in Software

Generate GS1 - 13 in Software Single-Mode Fiber

Single-Mode Fiber
Recognize EAN-13 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Drawing GTIN - 13 In None
Using Barcode generator for Software Control to generate, create EAN 13 image in Software applications.
An interesting mental conundrum crops up with the introduction of singlemode fiber. The core of single-mode fiber is significantly narrower than the core of multimode fiber. Because it is narrower, it would seem that its capability to carry information would be reduced due to its limited lightgathering capability. This, of course, is not the case. As its name implies, it enables a single mode or ray of light to propagate down the fiber core, thus eliminating the intermodal dispersion problems that plague multimode fibers.
EAN13 Recognizer In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Print UPC - 13 In C#
Using Barcode printer for VS .NET Control to generate, create UPC - 13 image in VS .NET applications.
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Paint UPC - 13 In VS .NET
Using Barcode generation for ASP.NET Control to generate, create EAN13 image in ASP.NET applications.
Draw EAN13 In VS .NET
Using Barcode drawer for .NET Control to generate, create GS1 - 13 image in Visual Studio .NET applications.
Transport Technologies
EAN13 Encoder In Visual Basic .NET
Using Barcode generation for Visual Studio .NET Control to generate, create European Article Number 13 image in VS .NET applications.
Print Bar Code In None
Using Barcode printer for Software Control to generate, create bar code image in Software applications.
6
Encoding Data Matrix In None
Using Barcode drawer for Software Control to generate, create Data Matrix image in Software applications.
EAN-13 Supplement 5 Encoder In None
Using Barcode generator for Software Control to generate, create EAN13 image in Software applications.
In reality, single-mode fiber is a stepped-index design, because the core s refractive index is slightly higher than that of the cladding. It has become the de facto standard for optical transmission systems and takes on many forms depending on the specific application within which it will be used. Most single-mode fiber has an extremely narrow core diameter on the order of seven to nine microns, and a cladding diameter of 125 microns. The advantage of this design is that it only enables a single mode to propagate. The downside, however, is the difficulty involved in working with it. The core must be coupled directly to the light source and the receiver in order to make the system as effective as possible. Given that the core is approximately one-sixth the diameter of a human hair, the mechanical process through which this coupling takes place becomes Herculean.
Code 128C Printer In None
Using Barcode creator for Software Control to generate, create Code 128A image in Software applications.
Printing USS-128 In None
Using Barcode creator for Software Control to generate, create EAN128 image in Software applications.
Single-Mode Fiber Designs
Encoding EAN-8 In None
Using Barcode maker for Software Control to generate, create EAN 8 image in Software applications.
Code 128 Code Set B Drawer In .NET
Using Barcode creation for VS .NET Control to generate, create Code128 image in .NET applications.
The reader will recall that we spent a considerable amount of time discussing the many different forms of transmission impairments (nonlinearities) that challenge optical systems. Loss and dispersion are the key contributing factors in most cases and do, in fact, cause serious problems in high-speed systems. The good news is that optical engineers have done yeoman s work creating a wide variety of single-mode fibers that address most of the nonlinearities. Since its introduction in the early 1980s, single-mode fiber has undergone a series of evolutionary phases in concert with the changing demands of the bandwidth marketplace. The first variety of single-mode fiber to enter the market was called non-dispersion-shifted fiber (NDSF). Designed to operate in the 1,310-nm second window, dispersion in these fibers was close to zero at that wavelength. As a result, it offered high bandwidth and low dispersion. Unfortunately, it was soon the victim of its own success. As demand for high-bandwidth transport grew, a third window was created at 1,550 nm for single-mode fiber transmission. It provided attenuation levels that were less than half those measured at 1,310 nm, but unfortunately was plagued with significant dispersion. Since the bulk of all installed fiber was NDSF, the only solution available to transmission designers was to narrow the linewidth of the lasers employed in these systems and make them more powerful. Unfortunately, increasing the power and reducing the laser linewidth is expensive, so another solution emerged.
Making GTIN - 12 In Java
Using Barcode drawer for Java Control to generate, create UPCA image in Java applications.
Printing EAN13 In .NET
Using Barcode drawer for .NET framework Control to generate, create GS1 - 13 image in VS .NET applications.
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Generate EAN128 In Java
Using Barcode printer for Android Control to generate, create EAN / UCC - 13 image in Android applications.
Printing Data Matrix In Visual C#
Using Barcode generator for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in .NET framework applications.
Transport Technologies
Reading Code39 In VS .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Creating Code 3 Of 9 In VS .NET
Using Barcode generator for Visual Studio .NET Control to generate, create Code 3 of 9 image in VS .NET applications.
Transport Technologies
Dispersion-Shifted Fiber (DSF)
One solution that emerged was DSF. With DSF, the minimum dispersion point is mechanically shifted from 1,310 nm to 1,550 nm by modifying the design of the actual fiber so that waveguide dispersion is increased. The reader will recall that waveguide dispersion is a form of chromatic dispersion that occurs because the light travels at different speeds in the core and cladding. One technique for building DSF (sometimes called zero dispersionshifted fiber) is to actually build a fiber of multiple layers. In this design, the core has the highest index of refraction and changes gradually from the center outward until it equals the refractive index of the outer cladding. The inner core is surrounded by an inner cladding layer, which is in turn surrounded by an outer core. This design works well for singlewavelength systems, but experiences serious signal degradation when multiple wavelengths are transmitted, such as when used with DWDM systems. FWM, described earlier, becomes a serious impediment to clean transmissions in these systems. Given that multiple-wavelength systems are fast becoming the norm today, the single-wavelength limit is a showstopper. The result was a relatively simple and elegant set of solutions. The second technique is to eliminate or at least substantially reduce the absorption peaks in the fiber performance graph so that the second and third transmission windows merge into a single, larger window, thus enabling the creation of the fourth window described previously that operates between 1,565 and 1,625 nm, the so-called L-band. Finally, the third solution came with the development of NZDSF. NZDSF shifts the minimum dispersion point so that it is close to the zero point, but not actually at it. This prevents the nonlinear problems that occur at the zero point to be avoided because it introduces a small amount of chromatic dispersion.
Copyright © OnBarcode.com . All rights reserved.