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total reflection

In optical transmission in optical waveguides, the light beam is totally reflected between the core glass in which it is guided and the cladding glass

. In optical waveguides, reflections

are due to different densities of the two types of glass and to the coupling angle

at whichthe light

enters the core glass.

Total reflection of a light beam between the core and cladding glass

Total reflection of a light beam between the core and cladding glass

As long as the coupling angle of the light falls below a certain acceptance angle, the light coming from the core glass experiences a total reflection at the cladding glass. Only when the coupling angle becomes very steep and exceeds a certain value, namely the critical angle, is the light beam no longer reflected back into the cladding glass, but exits the cladding glass and is no longer available for optical transmission.

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Englisch: total reflection
Updated at: 29.01.2021
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