Optical Power Measurement And Optical Receiver; Fiber Optical Connector And Adapter Introduction - ADInstruments S7200 Operation Manual

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6.14. Optical Power Measurement and Optical Receiver

6.14.1. Fiber Optical Connector and Adapter Introduction

Fiber optical connector is the most commonly used passive optical fiber device. It
connect two fiber optical's end faces, realize optical signal continue transmission.
You can find optical connector at many position: optical fiber end face, passive
optical fiber device input and output port, active optical equipment input and
output port and fiber jumper.
Optical fiber connector is composed by pin and connector, example FC/PC type
connector. "FC" at the front side of the symbol "/", means outside connect type.
Often used outside connection type: FC, SC, ST, LC, MU, MT-RJ, D4, E2000. "PC" at
the back of symbol "/", means the shape of the pin end face. Often used the shape
of the end face: PC, APC, UPC.
•
Straight physical contact (PC)
The fiber ends are pressed together in the connector. There is no air gap left to
cause reflections. The return loss is 30 – 55 dB.
This is the most common connector for single mode fibers (for example FC/PC, ST,
SC/PC, DIN, HMS, E 2000 connectors).
•
Slanted (angled) physical contact (APC)
Figure 6-118 Slanted (angled) Physical Contact (APC)
In these connectors the ends of the fibers are slanted. Again no air gap is left. This
gives the best return loss (60-80 dB).
S7200 TV Signal Analyzer Operation Manual
Figure 6-117 Straight Physical Contact (PC)
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