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FIBER END ANGLE MEASUREMENT 

To measure the end face angle of a cleaved fiber, you must  remove the connector mount and install the fiber cleave angle measurement fixture. Part number FCA-125.

        Using the following formula you can calculate the number of fringes per degree of end angle.

Tangent q = H / D = Nl / 2D

WHERE:

H = The height of the fiber edge away from the reference flat. 

D = The diameter of the fiber in microns.  

N = The number of fringes per degree. 

l = The wavelength of the light source

in microns.

       The End-View uses a Blue LED at 0.472mm. 

l / 2  =  The height of one fringe = 0.236mm. 

For a fiber diameter of 125mm: 

Tangent 1° = (N x 0.472)

                      ( 2 x 125 ) 

N = ( 0.01745 ) (250)

               0.472 

N = 9.24 Fringes  »  10

Therefore each fringe = 1/10°
 

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Contact Information: Fiber Optic Repair Fiber Optic Installation Fiber Optic Training Fiber Optic Services Fiber Optic Consulting NJ New Jersey DE Delaware PA Pennsylvania Micro Interferometer Microinterferometer

Telephone:
800-373-7078
Fax:
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Carl Durkow
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Last modified: April 12, 2006