MIL-PRF-85045/18C
PERFORMANCE REQUIREMENTS:
Optical properties:
Maximum attenuation rate:
4.5 dB/km at 850±20 nm, 2.0 dB/km 1300±20 nm for Class MM fiber.
1.5 dB/km at 1310±20 nm and 1550±20 nm for Class SM fiber.
For cables with radiation cross-linked jackets, the change in attenuation rate measurement may be made up to
30 days after cross-linking of the cable jacket.
Bandwidth: Fiber with a minimum bandwidth of 500 MHz-km at 1300 nm shall be used (multimode cables
only). Bandwidth is not specified at 850 nm.
Change in optical transmittance: Measurements shall be made at 1300±20 nm.
Mechanical properties:
Tensile loading and elongation: Applicable, tensile loading >1875 N.
Low temperature flexibility: The exposure temperature shall be -40 °C.
Cyclic flexing: 500 cycles at 25±2 °C and 100 cycles at -28±2 °C. Change in optical transmittance
measurements are to be made every 100 cycles for the 500-cycle exposure and every 25 cycles for the 100-cycle
exposure. Each change in optical transmittance measurement shall be performed with the test specimen in the same
position in the test cycle. The cycling may be halted to perform the change in optical transmittance measurement.
Cable twist-bending: 500 cycles at 25±2 °C and 100 cycles at -28±2 °C. Change in optical transmittance
measurements are to be made every 100 cycles for the 500-cycle exposure and every 25 cycles for the 100-cycle
exposure. Each change in optical transmittance measurement shall be performed with the test specimen in the same
position in the test cycle. The cycling may be halted to perform the change in optical transmittance measurement.
Impact: 50 cycles at 25±2 °C and 20 cycles at -40±2 °C. Upon final visual examination at all tested
temperatures, there shall be no jacket damage such as splitting or cracking.
Hosing: Both low pressure and hydrostatic pressure are applicable.
Hydrostatic: 7.7 MPa for M85045/18-01P and M85045/18-02P.
Cable scraping resistance: 750 cycles
Cable-to-cable abrasion: 500 cycles
Environmental properties:
Temperature range:
Operating:
-28 to 65 °C
Nonoperating:
-40 to 70 °C
Storage:
-40 to 70 °C
Temperature cycling: Change in optical transmittance measurements may be made periodically. At a
minimum, one optical transmittance measurement shall be made over a period of 1 hour at the end of each
temperature plateau.
Temperature humidity cycling: Change in optical transmittance measurements may be made periodically. At a
minimum, one optical transmittance measurement shall be made at the end of each temperature plateau.
Temperature life (life aging): Applicable, except that the jacket material shall be tested at 175 °C for 4 hours.
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