MIL-HDBK-2051 Fiber Optic Shipboard Cable Topology Design GuidanceThis handbook contains suggested design rules for defining a fiber optic cable topology. In addition, this document describes a suggested approach for developing and designing a fiber optic cable topology FOCT for a Naval platform and also identifies the applicable fiber optic component specifications. This handbook is primarily intended for use by the fiber optic cable topology design engineer, but provides useful information to a system design engineer as well.

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MIL-HDBK-2051(SH)

Equipment

Equipment

Heavy Duty

Cable Penetrator                                                                     Connector

Figure 9.  Typical end user equipment terminations.

Equipment Rack

light Duty

Connection

Cable Penetrator

Equipment Rack

light Duty

Connection

Heavy Duty

Connector

Figure 10.  Typical end user equipment rack terminations.

5.4.1.5   Fiber optic components  .  Standard Navy fiber optic components should be used in the FOCT.  The ship specification should provide a list of fiber optic components approved for use in that ship.  If there are questions on the use of a particular component, NAVSEA 03K12 should be contacted for information.  The following sections summarize the standard fiber optic components that are available for use in the FOCT.

5.4.1.5.1   Fiber type .  There are two basic types of fiber that are qualified for shipboard use, single mode and multimode.  The type of fiber installed in the FOCT should be determined from the system requirements.  The Navy standard multimode fiber is the MIL-F-49291/6 fiber (62.5 µm core/125 µm cladding diameters).  The Navy standard single mode fiber is the MIL-F-49291/7 fiber (9 µm nominal mode field diameter).

5.4.1.5.2   Fiber optic cables .  The Navy standard fiber optic cables are the MIL-C-85045 cables.  Either of the two standard fibers can be used in the Navy standard cables.  There are four standard fiber counts that can be used,

4, 8, 24 and 36 fiber.  Single mode and multimode fibers are not contained in the same cable.

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