Fiber Optic Carriers

Wholesale customers around the world depend on international fiber optic solutions for transport to meet their growing communications needs. With the advent of Gigabit Ethernet 10 also known as 10GbE, physical limitations and also the properties of the fiber optic carrier face new challenges. The network designer must consider all these aspects before designing a perfect network. As speed increases in these networks, the effects of fiber such as intermodal chromatic dispersion and polarization have become an important factor. This adds to the considerations of the network designer that he or she needs to understand and overcome in order to build a good network.

There are different types of classifications of optical fiber support such as OC-1, OC-3, OC-12, OC-1 etc. The optical carrier is used for SONET line and has a speed of nearly 51.84 Mbits / sec. The OC-3 optical carrier is used in the normal network line and having a bit rate of 1552.52 m / sec. The optical carrier can also be compared to SDH in which case the OC-3 may be represented as the electrical STS-3 level.

Optical Fiber Fusion Splicing and Its Applications

1. Very compact

2. Lower insertion loss

3. With back reflection (optical return loss ORL)

4. The higher mechanical resistance

5. Permanent

6. It can withstand extreme temperature changes high

7. Prevents dust and other contaminants in the optical path

Different types of splicing

Fusion splicing environment and applications can be divided into three types: 1. Field splice 2. Splicing factory and 3. Laboratory splicing.

An important example of field splicing is the set of submarine fiber cables aboard fiber deployment ships. The example of the splice could be factory set of passive optical fiber devices such as a WDM. A laboratory example of splice is made by fusion splicing developed new fibers researchers to test its compatibility with existing industry standard fibers.

Fiber fusion splicing involves concepts from many topics including the theory of optical waveguide, heat transfer, materials science, mechanical engineering, fluid mechanics, etc..

Introduction to fusion splicing process

The main steps can be summarized as follows.

Fiber 1.Optical peel

The fiber cable jacket is removed and then the polymer coating fiber with stripped optical fiber strippers.

2.Fiber cleavage

The fiber is cleaved with specialized tool called fiber blade. There are two types of fiber blade exist: high precision fiber blade for single mode applications and Cleaver field for multimode applications. A mirror as nearly perfect front surface is accomplished through the split process.

3.Fiber alignment

The fibers are aligned with each other laterally by the stepper motor in a fusion splicer. This may involve rotation of the fibers in the polarization maintaining fiber splices.

Fiber Optic Light Source for Optical Communication Systems

Requirement light source in a fiber optic communication

Light source plays an important role in a system of optical fiber communication. The optical fiber core system consists of a transmitter, an optical fiber, and a receiver. The transmitter has a light source that is modulated by a suitable drive circuit according to the signal to be transmitted.

The choice of an optical source is determined by the particular application. For high speed systems of optical fiber communication, which operate at speed greater than 1 Gbit / s, the light source selection is even more critical. The source must meet several basic requirements.

The first requirement is that it must emit a wavelength that corresponds to the low-loss window of fused silica fiber material more common, namely 1.5um and 1.3um windows. This is very important because the fiber links often operate at several tens of kilometers span without repeater. For a given optical power at the wavelength, the less fiber loss would result in larger repeater spacings.

The second requirement is high speed digital modulation. Current generation of optical fiber systems of communication have reached the speed of 40 Gb / s and 100 Gb / s. This requires that the source of light to be modulated at speeds over 2.5 Gb / s. To fulfill this requirement, two kinds of modulation methods have been developed. The first type is to modulate the light source directly to the desired speed. The second type of modulation is the use of an external LiNbO3 modulator. For the second type, the light source is needed to give constant power. Read More