HP 83480A User Manual

Return loss is another important factor. It is a measure of reection. The less
reection the better, (the larger the return loss, the smaller the reection).
The best physically contacting connectors have return losses better than
50 dB, although 30 to 40 dB is more common.
Causes of connector loss and reections include core misalignment,
dierences in the numerical aperture of two bers, spacing and air gaps,
reections caused by damaged, worn, or loose ber ends, and the improper
use and removal of index matching compounds.
Achieving the best possible connection, where the ber end faces are ush
(no air gap) and properly aligned, depends on two things:
1.
the
type
of
connector
2.
using the
proper
cleaning
and
connecting
techniques
.
If
the
connection
is
lossy
or
reective
,
light
will
not
make
a
smooth
transition.
If
the
transition
is
not
smooth
or
the
connection
is
not
repeatable
,
measurement
data
will
be
less
accurate
.
F
or
this
reason,
lightwave
connections
can
make
a
critical
dierence
in
optical
measurement
systems
.
xx

HP 83480A Specifications

General

Brand	HP
Model	83480A
Category	Measuring Instruments
Language	English