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Definition of Terms
N O T E
N O T E
142
Changes in the cabling after user e-cal add to the specified relative
frequency response uncertainty.
Measurement: Based on a reference RF O/E receiver.
Responsivity
The amplitude response R of a device under test (DUT) to a
harmonic stimulus:
• E/O measurement: R is the ratio of
in Watt to the electrical stimulus amplitude in Ampere,
expressed in W/A.
• O/E measurement: R is the ratio of electrical response
amplitude in Ampere to the
expressed in A/W.
In both cases, responsivity in
or "dB
") is calculated as 20-log(R).
A/W
• O/O measurement: R is the difference between the
optical power
in dBm at the DUT output and at the DUT
input, expressed in dBo. If expressed in dBe, it is twice this
number.
Responsivity of an O/E or E/O device may be called conversion efficiency.
For an O/O device, R [dBo] = -(insertion loss [dB]).
References
(1)
"Guide to the Expression of Uncertainty in Measurement"
("GUM"), BIPM, IEC, ISO et al. (1993)
Keysight N4373D Lightwave Component Analyzer, User's Guide
Modulated optical power
Modulated optical power
Decibel (dBm, dBo, dBe)
in Watt,
("dB
"
W/A
Modulated
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