In addition, the following are some of the many examples where the quality
of the information presented could be increased - they could create
an aside page or a link to a more indepth analysis than just the current
superficial tip of the iceberg.
Losses
One of the major areas that this site
did not touch on too well was that of loss.
It is nice, interactive with its questions and easy, touching on the areas
of loss generally with sections such as Fibres
of the Same Diameter and The
Optimum Fibre Connection , but it did not go into sufficient detail,
such as:
In Ideal coupling:
However, in actual coupling:
In addition, there are many connection losses in step and graded index fibres, such as the five listed below.
Graph cases:
(A) Measured in short cable coupled into a wide intensity
source e.g. an LED
(B) Measured at end of a long fibre (about 1km) after
connection
(C) Measured when the connection is between long fibres
1: Separation loss 
and Fresnel loss 
2: Lateral displacement loss 
3: Angular misalignment loss 
4: Diameter mismatch loss 
5: Numerical aperture mismatch loss 
The connection between two optical
fibres is a big problem. It is important that the connection loss be the
same every time the connection is made.
Thus we need to choose which kind of connector types
is good enough to reduce the loss of the light intensity.
We have many types of connectors from many companies, but in general they have four basic connectors
1. Butt joint: The connectors have a cylindrical ferrule which butt joint to another cylindrical ferrule within a sleeve. There are ST model, FC model, D4 model, SMA model and PC model.
