Optical Fiber Communications 4th Edition by Gerd Keiser

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Consider an optical fiber that has a core refrac­tive index n 1 = 1.48 and a numerical aperture NA = 0.20. Using Eqs. (5.32), (5.33), and (5.34), plot the three mechanical misalignment losses in decibels over the following ranges:
( a ) 0 d/a 1.0
( b ) 0 s/a 3.0
( c ) 0 10°