A single mode fiber has a beat length of 4cm at 1200nm. What is birefr – McqOptions

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1.	A single mode fiber has a beat length of 4cm at 1200nm. What is birefringence?
A.	2*10<sup>-5</sup>
B.	1.2*10<sup>-5</sup>
C.	3*10<sup>-5</sup>
D.	2
Answer» D. 2

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