MIL-PRF-29504/4D
b.
Qualification of termini for multimode fiber sizes.
(1)
Complete qualification inspection shall be performed on termini with optical fiber having a
cladding diameter of 125 microns. Termini shall have a ferrule hole diameter of 126 +1, -0
microns. Manufacturers who qualify under this specification sheet for the terminus with the
126 +1, -0 micron ferrule hole diameter are qualified under this specification sheet for the
other 125 cladding hole diameters for use with multimode fiber sizes. Manufacturers who
qualify under this specification sheet for the terminus with the 126 +1, -0 micron ferrule hole
diameter are qualified under this specification sheet for the other (i.e., polyimide) hole
diameters for use with multimode 50/125 or 62.5/125 micron fiber sizes.
(2)
100/140 fiber size. Manufacturers who qualify under this specification sheet for the termini
with the multimode, 50/125 or 62.5/125 micron fiber size and pass the insertion loss and
size inspections are qualified under this specification sheet for the 100/140 micron fiber
size. Qualification inspection for the 100/140 micron fiber size shall be performed on
termini with a ferrule hole diameter of 173 +3, -0 microns to cover the case for terminations
of termini onto polyimide coated fiber. Manufacturers who qualify under this specification
sheet for the terminus with the 173 +3, -0 micron ferrule hole diameter are qualified under
this specification sheet for the other 100/140 hole diameters for use with multimode fiber
sizes (both non-polyimide and polyimide).
(3)
Multiple fiber sizes, same ferrule hole diameter. Manufacturers who qualify under this
specification sheet for termini with the 50/125 micron fiber size are qualified under this
specification sheet for the 62.5/125 micron fiber size. Qualification inspection shall be
performed on termini with a ferrule hole diameter of 126 +1, -0 microns.
(4)
Sizes larger than 100/140 fiber. Manufacturers who qualify under this specification sheet
for the termini with the multimode, 100/140 micron fiber size or less are qualified under
this specification sheet for the termini with larger fiber sizes.
(5)
Metal ferrule sizes. Manufacturers who qualify under this specification sheet for the
termini single mode and for multimode fiber sizes with ceramic ferrules and perform the
full qualification inspection for the 100/140/172 fiber size using a 175 +3, -0 ferrule hole
diameter and the size and insertion loss inspections for the 62.5/125/155 fiber size using
the 157 +3, -0 ferrule hole diameter are qualified under this specification sheet for the
other ferrule hole diameters with multimode fiber.
(6)
Constraint for qualification by similarity cases listed above. These qualification by
similarity cases are valid if the only difference between the qualified termini and the larger
size termini being offered is a change in the terminus ferrule hole diameter and TICC
markings.
c.
Qualification of termini for different cable strain relief capture mechanisms.
(1)
Qualification inspection shall be performed on termini for the smallest fiber size and with
the largest hole diameter being offered.
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