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This part of the IEC 60793-1 defines test methods for both the phase beat length and the group beat length. These two parameters are defined differently, and will give different results depending on type of polarization-maintaining (PM) fibre. The phase beat length is the relevant parameter for the fibres ability to maintain a high extinction ratio. This is described in more details in Annexes A and B.
| Author | VDE | 
|---|---|
| Editor | VDE | 
| Document type | Standard | 
| Format | Paper | 
| ICS |  						33.180.10 : Fibres and cables
						 | 
| Number of pages | 25 | 
| Replace |  DIN EN 60793-1-60 (2017-01) | 
| Cross references |  EN 60793-1-60 (2017-05), IDT | 
| Weight(kg.) | 0.1425 | 
| Year | 2017 | 
| Document history |  DIN EN 60793-1-60 (2017-10) | 
| Country | Germany | 
| Keyword | DIN EN 60793;DIN EN 60793-1;EN 60793;EN 60793-1;EN 60793-1-60;60793 |