UHV and High Vacuum Fibre Optic Components.
For an increasing number of applications, Optical Fibres are used in vacuum either to get signals out or to bring "light" to the right point into the chamber.
The 3 different types of Optical Fibres:
• The Step Index Fibres are the thickest Fibres used. They are used for illumination or heat transfer by light and applications such as Spectroscopy. These Fibres have an Outside Diameter of 400 or 600 microns.
• The Graded Index Fibres are typically data fibres. They have the advantage that the signal is kept sharper.
• The best signal fibres are the Single Mode types. By having a very small diameter (6-9µm), which is much smaller than the wavelength of the light, there is only one optical path available and the signal keeps its shape.
Both Graded Index and Single Mode have an Outside Diameter of 125 microns.
Allectra offers Feedthroughs and components with all three types.