MIL-HDBK-415A
LIST OF FIGURES - continued
FIGURE
PAGE
5-7
Examples of self-supporting aerial cables ...................................................................30
5-8
Examples of indoor and drop cable .............................................................................31
5-9
Tactical and undersea cable .........................................................................................32
6-1
Elements of FO transmitters ........................................................................................40
6-2
Optical source output spectra.......................................................................................42
6-3
Optical power versus drive current ..............................................................................45
6-4
Receiver block diagram ...............................................................................................48
7-1
Connector types ...........................................................................................................52
7-2
Mechanical losses in fiber optic connectors ................................................................54
7-3
Types of splices............................................................................................................56
7-4
Examples of couplers...................................................................................................59
7-5
Internal construction of representative optical attenuators ..........................................61
7-6
Internal construction of an optical isolator ..................................................................63
8-1
Example use of power splatters (couplers) ..................................................................67
8-2
Duplex (bidirectional) WDM example ........................................................................68
9-1
Digital coding...............................................................................................................72
10-1
Typical fixed facility telecommunications system ......................................................76
10-2
Point-to-point link........................................................................................................81
10-3
Hub (star) link ..............................................................................................................81
10-4
Linear drop link............................................................................................................81
10-5
Add/drop link ...............................................................................................................82
10-6
Self healing ring link....................................................................................................82
10-7
Fiber manhole splicing.................................................................................................88
10-8
Fiber distribution panel ................................................................................................88
10-9
Free running/loop timing .............................................................................................91
10-10
External timing/loop timing.........................................................................................91
10-11
External timing (plesiochronous).................................................................................91
11-1
Power and dispersion limited distances .......................................................................97
11-2
Receiver sensitivity curves ..........................................................................................99
11-3
Relative received power versus BER.........................................................................101
11-4
Fiber link example .....................................................................................................102
12-1
Test configuration for optical power measurements..................................................119
12-2
Typical LED and laser spectrum waveforms.............................................................121
12-3
Test configuration for receiver sensitivity and maximum
receiver input measurements......................................................................................124
12-4
Test configuration for insertion loss measurements ..................................................126
12-5
Test configuration for return loss measurements.......................................................128
xiv
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