Keysight Technologies 86120B, Руководство пользователя

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24
Getting Started
Cleaning Connections for Accurate Measurements
take repeatability uncertainty into account?
• Will a connector degrade the return loss too much, or will a fusion splice be required?
For example, many DFB lasers cannot operate with reflections from connectors. Of-
ten as much as 90 dB isolation is needed.
Figure 1-1. Basic components of a connector.
Over the last few years, the FC/PC style connector has emerged as the most popular
connector for fiber-optic applications. While not the highest performing connector,
it represents a good compromise between performance, reliability, and cost. If prop-
erly maintained and cleaned, this connector can withstand many repeated connec-
tions.
However, many instrument specifications require tighter tolerances than most con-
nectors, including the FC/PC style, can deliver. These instruments cannot tolerate
connectors with the large non-concentricities of the fiber common with ceramic
style ferrules. When tighter alignment is required, Keysight
Technologies instruments typically use a connector such as the Diamond HMS-10,
which has concentric tolerances within a few tenths of a micron. Keysight Technol-
ogies then uses a special universal adapter, which allows other cable types to mate
with this precision connector. See
Figure 1-2 .