Agilent 11982A Amplified Lightwave Converter
Agilent 11982A
Amplified Lightwave Converter
Product Overview
Wide bandwidth, sensitive O/E converter for
characterizing lightwave systems and components
Agilent’s lightwave converter,
A calibration chart is provided
the Agilent 11982A, combines a
with each Agilent 11982A. A
PIN photodetector with a low-
sample chart is shown; it con-
noise preamplifier to provide a
tains instrument-specific data
general-purpose front-end for
for frequency response and
lightwave frequency- and time-
responsivity. Applying
domain measurements. It can
this calibration data to
be used with Agilent spectrum
your system enables
analyzers, oscilloscopes, bit-
you to make corrected,
error-rate testers (BERT), and
accurate lightwave
network analyzers, as well as
measurements.
with other manufacturers’
instrumentation.
The Agilent 11982A covers the
wavelengths from 1200 nm
to1600 nm and bandwidths
from dc to 15 GHz. Its 300
volts/watt conversion gain and
0.05% input optical reflection
significantly improve sensitivity
for characterizing lightwave
systems and components.
Frequency Domain
When used with an electrical
When a laser is modulated,
spectrum analyzer, the Agilent
its noise floor and modulation
11982A displays optical modula-
distortion products change dra-
tion power as a function of fre-
matically. Often, knowing static
quency. Intensity modulation,
noise performance is not enough
distortion, and laser intensity
to predict the effects of laser
noise can also be displayed and
noise on the system. The Agilent
measured.
11982A and frequency-response
corrections, combined with an
The laser’s relaxation oscillation
Agilent electrical spectrum
appears as a peaking in the
analyzer, help you accurately
intensity-noise floor of the laser.
measure these changes and
The location of this resonance
dynamically observe their effect.
Adding the Agilent 11980A fiber-
peak is directly related to the
optic Mach-Zehnder interferome-
maximum modulation rate of
The Agilent 11982A Option 001 is
ter to these configurations
the laser. The 300 volts/watt
a memory card that is program-
allows you to make linewidth,
conversion gain of the converter
med with 11982A frequency-
chirp, and frequency modulation
improves the frequency-domain
response corrections and lightwave
(FM) measurements of single-
sensitivity so that the relaxation
menus. Use it with the Agilent
line lasers.
oscillation frequency can be eas-
8594E or 8595E RF spectrum
ily distinguished.
analyzer or Agilent 8593E
microwave spectrum analyzer.
Option 001 lets you load correc-
tion data and menus directly
into the spectrum analyzer,
enabling easy, accurate, and
corrected frequency domain
measurements to 22 GHz.
2
Time Domain
Eye diagram with
Agilent 11982A
Eye diagram
with a photo
diode only
Combining the dc-coupled Agilent
11982A with an Agilent 86100A
Infiniium DCA (digital communi-
Agilent 11982A
cations analyzer) provides the
impulse response
capability for optical eye-pattern,
extinction-ratio, and impulse-
response measurements. Use
these measurements to verify
For best extinction ratio accuracy
The Agilent 11982A provides dc
optical and electro-optic compo-
and repeatability, the Agilent
coupling with 20 dB of electrical
nents, optical system-level per-
86100A, together with one of its
gain and 15 GHz of bandwidth.
formance, and standards testing
broad range of optical plug-ins
The Agilent 86100A Infiniium
(i.e. SONET/ SDH, FDDI, and
is recommended.
DCA has a wide range of band-
ISDN) on telecommunications
widths, low jitter, and the aver-
signals.
The presence of a preamplifier
aging and persistence features
in front of the oscilloscope can
you need to make time-domain
Eye diagrams and extinction
be critical to boost the electrical
measurements.
ratios help you to adjust your
signal detected by the photodiode
transmission system for the best
above the oscilloscope’s noise floor.
The Agilent 86100A gives you
qualitative performance. To make
a wide range of time-domain
the most accurate measurements,
The variable and infinite persis-
characterization capabilities
the receiver systems require dc
tence feature enables worst-case
including automated eye-diagram
coupling, bandwidth, sensitivity,
eye-pattern closure analysis
measurements, auto-aligning
and variable and infinite persis-
without masking hidden low-
SONET/ SDH/Fibre Channel/
tence. DC coupling is essential
probability tails.
Gigabit Ethernet Masks and,
for extinction-ratio measure-
repeatable extinction ratio
ments. Bandwidths typically must
You can also make impulse mea-
measurements for eye diagram
be at least four to five times the
surements such as full-width
analysis.
transmission data rate to reduce
half-maximum (FWHM), jitter,
measurement errors. Eye dia-
overshoot, undershoot, and ringing.
grams cannot use the averaging
When measuring points in a
feature of the oscilloscope to
communication system where
increase signal-to-noise ratios.
signal levels are low, using an
amplifier makes the difference
between success or failure.
3
Specifications
Specifications describe the instrument’s warranted performance over the 0 °C to 55 °C temperature range, except where noted. Characteristics pro-
vide information about non-warranted instrument performance in the form of nominal values. All amplitude specifications are in optical power units
unless noted by an asterisk(*).
Specifications/Characteristics
Inputs/Outputs
Wavelength (characteristic)
1200 nm to 1600 nm
Optical Input Connector
Single Mode Fiber Connectors:
(front panel)
Diamond HMS 10, FC/PC, ST, DIN
Bandwidth
dc to 15 GHz (optical)
(characteristic)
dc to 11 GHz (electrical)
Output Connector
APC 3.5, male, 50 ohms (nominal)
(front panel)
Full Width Half Maximum
29.4 ps
(calculated from FWHM = 0.44/BW opt)
Conversion Gain (dc responsivity)1
> 200 V/W
General
(provided value accurate to ±20%)
300 V/W, nominal
Environmental
Noise Equivalent Power2
30 pW√ Hz
Temperature Range
Operational 0 to +55 °C
(characteristic)
Storage –40 to +75 °C
EMI
Conducted and radiated emission are in
Input Return Loss
> 23 dB
compliance with the requirements of
(characteristic with HMS-10/Diamond connector)
FTZ 1046; CISPR Publication 11 (1975);
and MIL-STD-461C, Part 7, Methods
Aberrations
< 20% peak-to-peak
CE03 and RE02.
(characteristic)
Corrected Freq Response3
20 to 30°C
0 to 55°C
Power Requirements
100, 120, 220, or 240 volts
dc – 22 GHz
±2.2 dB*
±4.7 dB*
(±10%), 47–63 Hz
Power consumption <75VA
Harmonic Distortion
> 41 dB* below fundamental
Output < –10 dBm
Weight
3.76 kg (8.4 lb)
Maximum Safe Optical Input Power
10 mW (+10 dBm)
Dimensions
102 mm (4.02”) height, 213 mm
(average)
(8.39”) width, 368 mm (14.49”) length
Maximum Operating Optical Input Power 1.5 mW (+1.76 dBm)
* Refers to electrical power units
(peak)
1 ± Connector variation
2 = 3.7 µW in a 15 GHz bandwidth
Output Voltage Range
> 700 mV
3 Corrections are either downloaded into the Agilent 8593E, 8594E or 8595E
(into 50 ohms)
spectrum analyzer or obtained from the calibration chart.
Output Offset Voltage
< 1 mV
(into 50 ohms)
Output Electrical Return Loss
0.1 to 12 GHz (characteristic)
> 11 dB*
12 GHz to 22 GHz
> 9 dB*
Ordering Information
Agilent 11982A
Amplified Lightwave Converter
www.agilent.com/find/emailupdates
Get the latest information on the
(Must order one of the connector options listed below)
products and applications you select.
Option 001
Frequency Response Correction/Menus (for use with
Agilent 8593E/8594E/8595E spectrum analyzers only)
Connector Options
81000 AI
Diamond HMS-10 Connector Interface
FC/PC-012
FC/PC Connector Interface
81000 SI
DIN 47265 Connector Interface
81000 VI
ST Connector Interface
Recommended Accessories
Agilent 11980A
Fiber-Optic Interferometer
Agilent 11742A
Blocking Capacitor
Agilent 5952-9654
Fiber-Optics Handbook
Agilent 87441
Family of SDH/SONET/Fibre Channel Filters
4
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