INTRODUCTION

Optical fiber is a transmission medium usually used in data networks, a very fine thread of transparent material, glass or plastics, which are sent light pulses that represent the data to be transmitted.

Currently there are several types of optical fibers which can be classified into two main groups: single mode and multimode fibers.

Servicios y Aplicaciones INEL SL analyzes and certify network cabling and fiber optics, for which we have advanced measurement tools such as NOYES or FLUKE with adaptations F.O. DTX-MFM2

FEATURES AND SERVICES

• Measuring the optical power loss.
• Length measurement in dual-fiber cable.
• Wiring test multimodal 850 nm and 1300 nm.
• Measurement reference levels that meet ISO and TIA standards.
• Results pass/fail limits based on industry.
• Visual Fault Locator (test splices, bends and continuity and polarity of the fiber).

REGULATIONS

• ANSI/TIA-568-C.0 6.4.2.1.
• N10140 – Complies with relevant Australian.
• CE – Conforms to relevant European Union directives.
• Listed by the Canadian Standards Association.

LASER SAFETY

• VFL port class 1
• Class 2
• Meets EN60825-1 y EN61010-1 (CE) y CFR21

MONOMODE

A single mode fiber is an optical fiber having a core that is small enough so that there is essentially only one path that light can take, as it spreads through the cable. The size of single mode fiber core is between 8 and 10 um.

MULTIMODE

A multimode fiber is a fiber that can spread more than one mode of light. For a multimode fiber the number of modes can easily be more than a thousand. A multimode fiber is commonly used in communications applications short.

A fiber optic cable manufacturing well-crafted, not normally present any loss of light, but actually suffers several losses which the most common are:

1. Rayleigh scattering losses:During the manufacturing process, glass is produced in long fibers of very small diameter, during this process, the glass is in a plastic state (between liquid and solid). The voltage applied to the glass during this process causes the glass to cool and develop submicroscopic irregularities formed on a permanent basis in the fiber. The light rays that impinge on these irregularities are diffracted, causing light to scatter in many directions.
2. Crease losses:Crease losses occur in all the curves of an optical fiber, this is due to the change of angle of incidence at the boundary core – cladding. If the radius of curvature of the bend is greater than the minimum radius of curvature of the fiber, the losses are negligible or vice versa.
3. Coupling losses:In the fiber-coupling losses can occur in any of the three types of optical connections: connections from source to fiber, fiber to fiber and fiber connections photodetector. Union losses are caused most frequently by lateral misalignment, misalignment of separation and poor surface finish, more specifically:
    
   • Lateral misalignment. It occurs when there is a lateral or axial displacement between two pieces of adjacent fiber.
   • Misalignment of separation. Occurs when spliced fibers, the fibers should play, the more apart the fibers the greater the loss of light.
   • Bad surface finish. The tips of the two fibers to be joined must be highly polished, otherwise they may not align.