Effective Area | Alker Fibre Optic Specialists

Effective Area

All nonlinear effects are dependent upon the intensity of the electromagnetic field in the medium. However, it is the total optical power entering and leaving the fibre that is usually measured. Some method is required for converting between the two when comparing theoretical and experimental results.
The field in a single mode fibre is not evenly distributed or even fully contained within the core. It is larger at the fibre axis than near the core cladding interface and extends into the cladding to a degree depending on the actual refractive index profile. The effective area parameter has been defined for the purposes of calculating nonlinear effects. The larger the effective area or (MFD), the lower the power density and so the lower impact of non linear effects, and the smaller the effective area or (MFD), the higher the power density which leads to higher impact of the non linear effects.
The effective area is sometimes included in the description of the fiber name, such as Corning`s LEAF (Large Effective Area Fiber).

Related Posts

Deployable Armoured Cable Backpack

Introducing our range of deployable armoured cable reels with integral repair kits.  Solutions can be tailored…

read more

So the Speed of Light Never Changes?

Wrong! This only holds up in free space.  The speed of light slows down when it…

read more

Expanding Test Capabilities

We are excited to share that here at Alker we are expanding test capabilities for our…

read more

Sign up for latest updates

Sign up to receive email updates on company and new product announcements, special promotions and more.