MIL-DTL-83522E
3.4.3 Size. The size shall be specified in the specification sheets (see 3.1). Verification shall be in accordance with 4.7.4.
3.4.4 Fiber optic cable requirements. The connectors shall be designed for operation with fiber optic cables as specified in MIL-
3.4.5 Fiber optic ferrule. The fiber optic ferrule shall be a non-removable integral part of the fiber optic connector that is affixed to
the barrel mechanically or chemically or both. The specification sheets define the design and construction along with the method of
performing the optical termination.
a. Method of optical alignment, such as tube, straight sleeve, or grooved plate.
b. Coating requirements, as applicable.
3.4.5.1 Fiber attachment. Unless otherwise specified (see 3.1), fiber attachment shall be provided by adhesive bonding.
3.4.5.2 Cable strength member attachment. Unless otherwise specified (see 3.1), cable strength member attachment shall be
provided by crimping and adhesive bonding.
3.4.6 Special handling. The connectors specified herein shall be designed for use in protected field equipment and shall not
require special handling with the exception of periodic cleaning as specified in 3.4.8.
3.4.7 Mating characteristics. The connectors specified herein shall satisfy the following operational and human factor
requirements.
3.4.7.1 Optical performance degradation. The connectors specified herein shall remain within the optical performance limits
specified in 3.5.1.2 during the lifetime of the connector as measured by mating cycles as specified in 3.5.2.5.1 or the lifetime
requirements specified in 3.5.1.1.
3.4.8 Cleaning. Cleaning of the optical mating surfaces is not to be considered a repair action and is allowed to maintain the
optical performance of the connector in the operational environment. To facilitate cleaning, the connector design shall allow easy
accessibility to the optical faces. Disassembly of optical connectors is not acceptable for field operations. The ferrule end face of the
connector plug shall be cleanable using fiber optic (lint free) wipes, with then without high (greater than 99 percent) purity isopropyl
alcohol and of the connector receptacle. The optical interface surfaces of the connector receptacle and the optical interface of the
adapter (such as the alignment sleeve) shall be cleaned using fiber optic (particulate free) swabs with then without high (greater than 99
percent) purity isopropyl alcohol.
3.4.9 Dust cover. All optical connectors (plugs, adapters and receptacles) shall be provided with a plastic throw-away protective
cap or cover. The cover shall be free of mold release or any other lubricants.
3.4.10 Maintainability. The connectors specified herein shall be classified as field replaceable.
3.4.11 Sealing devices. Seals, grommets, o-rings, interfacial seals boots, gaskets, and other sealing devices as needed by the
connector design, shall meet the performance requirements as specified herein.
3.4.11.1 Optical junction sealing. When specified, optical junctions shall be sealed against moisture and contamination as
specified herein.
3.5 Performance requirements. The connectors specified herein shall meet the following performance requirements when the units are
assembled to an appropriate optical cable as specified (see 3.1).
3.5.1 Optical requirements. The connectors specified herein shall meet the specific optical performance requirements as specified
(see 3.1).
3.5.1.1 Insertion loss. The initial insertion loss shall be less than 0.75 dB, or as specified (see 3.1). The maximum insertion
loss at any time during qualification or quality conformance testing after the initial insertion loss is performed (i.e., insertion loss
3.5.1.2 Change in optical transmittance. The change in optical transmittance shall not be greater than 0.5 dB after any tests
and when required during any tests, as specified in this document (see 4.7.7). Unless otherwise specified the periodicity of the
measurement(s) taken during the test, when required, shall be appropriate for the test mentioned and as approved by the qualifying
activity.
3.5.1.3 Ambient light susceptibility. When specified (see 3.1), the optical power of the light from the optical port shall not be
greater than minus 50 dBm (see 4.7.8).
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