High-Performance, Portable Optical Spectrum Analyzer
MS9710B
Optical Spectrum Analyzer
0.6 to 1.75 µm
2
Compact High Performance
● 70 dB dynamic range
● –90 dBm guaranteed optical reception sensitivity
● Internal 3.5” FDD (Windows®)
● Tracking with tunable laser source
● Optical pulse measurement
● Full range of WDM application functions
The MS9710B is a diffraction-grating spectrum
analyzer for analyzing optical spectra in the 0.6 to
1.75 µm wavelength band. In addition to uses such as
measurement of LD and LED spectra, it has functions
for measuring the transmission characteristics of
passive elements such as optical isolators, as well as
the NF/Gain of optical fiber systems.
In addition to its basic features, the superior stability
and reliability of the diffraction grating (patent pending) easily pass the severe specifications required for
precise measurement of WDM communications methods, particularly in the 1.55 µm band. This analyzer
has the dynamic range, reception sensitivity and
sweep speed requested by users, backed by Anritsu’s
high-level technology. The high sensitivity meets the
exacting demands placed on today’s measuring
instruments. In particular, the excellent wavelength
and level specifications fully meet the dense WDM
requirements in the 1.55 µm band.
In addition to having a much wider dynamic range, its
compact portability (approx. 50% lighter) eliminates
the large cumbersome image of earlier analyzers by
perfectly combining portability with high performance.
In addition to the high reliability and excellent basic
performance, this analyzer has a full range of application functions to support accurate measurement in
the fastest possible time.
70 dB dynamic range
The measurement dynamic range of the MS9710B in
the normal measurement mode at a wavelength 1 nm
from the peak wavelength is 62 dB. In the highdynamic-range measurement mode, better than
70 dB can be achieved. The analyzer demonstrates its
excellence in SMSR measurement of DFB-LDs, as
well as in evaluation of narrow-band optical band
pass filters.
Measurement mode
Dynamic range
1 nm from peak 0.5 nm from peak
High dynamic range 70 dB 60 dB
Normal 62 dB 58 dB
High-dynamic-range measurement example with
DFB-LD spectrum passed via narrow-band BPF.
DFB-LD Narrow-band BPF MS9710B
–90 dBm guaranteed optical reception sensitivity
The MS9710B has achieved an improved S/N over a
wide range by taking thorough countermeasures to
noise and stray light. The RMS noise level at wavelengths from 1.25 to 1.6 µm is –90 dBm max. The
screen display below is the waveform obtained when
measuring a 1.55 µm DFB-LD optical source of –85
dBm; only 25 seconds are required for the measur ement.
In addition, the S/N can be improved using sweep
averaging. The screen display below shows the waveform after 10 averagings; the S/N is improved by more
than 5 dB.
3
Full function lineup
In addition to its excellent basic functions, the
MS9710B comes with a full lineup of other useful
functions summarized in the following table.
Device analysis
For analyzing and evaluating waveforms of
optical elements (DFB-LDs, FP-LDs, LEDs)
For waveform analysis by RMS and threshold
Waveform analysis methods; SMSR, half-width evaluation, WDM
waveform analysis
Application EDFA NF and gain measurement, PMD
measurement measurement (See applications.)
Modulation, pulsed Max. frequency range (VBW) = 1 MHz
light measurement (See applications.)
Multimarkers: Marker function for max. 128
Markers
points (See applications.)
Zone markers: For waveform analysis in zone
Peak/dip search: Search for a peak or dip
Power monitor Also functions as optical power meter
Vacuum wavelength Converts displayed wavelength to value in
display vacuum
External interfaces GPIB, RS-232C
DFB-LD waveform analysis
Waveform analysis in zone marker
Half-width measurement by threshold method
Relying on 1.55 µm transmission band
As a result of the need for increased transmission
capacity, R&D into large-capacity transmission techniques is becoming more active and Wavelength
Multiplexing (WDM) is at the stage of actual usage.
This WDM transmission technology requires quantitative measurement of the wavelength transmission
characteristics between each channel.
Measuring instruments for this purpose require much
more accurate wavelength and level measurement.
Furthermore, accurate measurement of fiber-amplifier
NF requires extremely good polarized light dependency and level linearity specifications.
The MS9710B design has achieved excellent wavelength and level specifications for this purpose in the
1.53 to 1.57 µm wavelength band. In particular, the
wavelength accuracy can be calibrated automatically
using an optional internal reference wavelength light
source; the post-calibration accuracy is better than
±0.05 nm. Evaluation of WDM systems requires measurement without repeated calibration at each measurement and the MS9710B achieves high-accuracy
measurement with high repeatability.
Wavelength accuracy
±0.05 nm (after calibration with
optional light source)
Wavelength linearity ±0.02 nm
Wavelength resolution <0.07 nm +10%
Wavelength flatness ±0.1 dB
Polarized light dependency ±0.05 dB
Level linearity ±0.05 dB (0 to –50 dBm)
1.53 to 1.57 µm specifications
4
● Thermal printer
built in
The MS9710B screen
display can be hardcopied at high speed
with the internal
printer, as well as
output to an external
printer via the GPIB.
● 3.5” internal FDD
In addition to saving and recalling measurement data,
etc., waveforms saved to floppy disk can be easily and
directly read by a personal computer.
The PC screen shown on the right is displaying an
image of the MS9710B screen saved to floppy disk.
Screen images can be saved to FD media and output
as Windows®bitmap-format files. In addition, since the
data can be output in text-file format, it can be manipulated easily using spreadsheet software.
*Pictures actual size
● Easy-to-read color TFT-LCD
5
● Cleanable optical input
connector
Seven connector types can
be used: FC/PC, DIN, ST,
SC, HMS-10/A, E2000, EC
Radial (optical return loss of
35 dB min.). The input connector can be removed and
refitted easily for fast cleaning.
Option is installed.
● Basic measure-
ment direct keys
Frequently-used
high function keys
can be set directly
at these hard keys.
Even a novice can
perform basic
measurements
easily using these
keys.
6
Applications for Every Need
Spectrum analysis for WDM communication system
Difficult problems in WDM transmission technology
are the wavelength characteristics for the gain, and
signal-to-noise ratio (SNR) between each channel. In
evaluation, it is very important to measure this quantitatively. The MS9710B permits extremely quick and
simple waveform analysis of up to 300 spectra. The
waveform and level (SNR) of each peak exceeding the
set threshold is displayed. The screen display below
shows an example of the gain tilt.
Polarization mode dispersion
An important factor determining the upper limit of the
transmission bit rate is the polarization mode dispersion (PMD). PMD is measured in the time and wavelength domains. The MS9710B can be used as a fixed
analyzer to perform simple and automated measurement in the wavelength domain and immediately
computes the PMD by data processing from the measured waveform. The wavelength difference (λ2–λ1)
between the peak wavelength (λ1) and the wavelength
at the Nth peak (λ2) are read directly and the PMD is
calculated from the following equation.
NF measurement of fiber amplifier (EDFA)
NF measurement by the optical method using an
optical spectrum analyzer measures the light input
and output to and from the EDFA. NF is determined
by the beat noise between the optical signal and the
Amplified Spontaneous Emission (ASE) as well as by
the beat noise between the ASE.
Since the MS9710B measures the ASE level with very
high accuracy, three methods can be used to measure NF: 1. Pulse measurement (JIS Method: Under
discussing), 2. Level calibration using fitting, and
3. Polarized light nulling*. Moreover, measurement can
be performed with the required dynamic range, level
linearity and polarization dependency.
* This analyzer is available as the ME7890A Optical Amplifier Test System
(uses a pulse method) in combination with the MF9619B Optical Modulator
and a personal computer, as the best system for measuring WDM signals
with the smallest possible error.
Built-in attenuator for high-power optical sources
When the built-in attenuator is added, optical inputs
of up to +20 dBm can be measured. And since the
attenuation is automatically corrected internally, there
is no need for the user to calibrate the measurement.
The screen display below shows the measurement of
a +20 dBm optical spectrum amplified by an EDFA.
PMD = K x
N-1Cλ1•λ2
∆λ
where: K is the mode coupling factor and C
is the speed of light (m/s).
7
Convenient light source option
(refer wavelength light for better accuracy)
Any one of the SLD light source & reference
wavelength light source (Option 13), SLD light source
(Option 14), reference wavelength light source (Option
05), and white light source (Option 02) can be installed
in the MS9710B.
The block diagram of the SLD light source & reference
wavelength light source option is shown below. This
option has two separate output ports: Port 1 for
wavelength calibration, and Port 2 for measuring
transmission characteristics. When the MS9710B is
calibrated automatically by inputting the reference
light for the wavelength, post-calibration wavelength
accuracy in the 1.52 to 1.57 µm range is better than
±0.05 nm. This is very useful in precision absolute
measurement of the wavelengths of light sources
used in WDM systems.
The following figure shows an example of measuring
the transmission characteristics of optical band pass
filter using the SLD light.
If this dynamic range is not required, a lower-cost
white light source can be installed instead.
The following figure shows the spectrum of the white
light source using SM fiber (for GI fiber, refer to the
specifications of Option 02).
The following diagram shows the spectrum of the
SLD light output from Port 2. When this light source is
used instead of the earlier white light source for measurement of the wavelength transmission characteristics of optical receiver elements, it is possible to
achieve a 20 dB wider dynamic range.
Spectrum of SLD light source
Block diagram of SLD light source & reference
wavelength light
SM fiber
SM fiber
SLD light
source
Acetylene
(C2H2) cell
Port 1 (reference
wavelength light
output)
Port 2 (SLD light
output)
Measurement of optical band pass filter
Note: The optical input section of the MS9710B is designed for connecting
single-mode fibers. There is the MS9780A Optical Spectrum Analyzer
which have the optical input section designed for connecting multimode fibers (50/62.5 µm).
Spectrum of white light source
8
Measurement is performed using the MS9710B soft
keys; the analyzer’s marker, trace and smoothing
functions permit easy analysis of measurement
results, including transmission loss, full width half
maximum (FWHM) stop-band loss characteristics.
Screens A and B below show measurement examples
for a dielectric filter with a center wavelength of 1540
nm. Screen A shows the FWHM measurement; since
the wavelength repeatability is better than ±7 pm, the
FWHM can be measured with very high accuracy.
Screen B shows a pass band and stop band loss
characteristics. Measurement is possible at a wide
dynamic range of better than 70 dB when the
MS9710B resolution bandwidth is set 0.2 nm.
Screen A: FWHM measurement example
Screen B: Wide dynamic range measurement example
Measurement of modulated and pulsed light
The synchronization signal for the measured
modulated/pulsed light is input to the external input
trigger on the rear panel. With this analyzer, the data
can be held by this sync signal. As a result, the
spectrum of the modulated or pulsed light can be
measured accurately without data loss.
In addition, an optical source that does not have a
sync signal can be measured in the same manner by
setting an appropriate gate time. The waveform in the
diagram below shows measurement of an
optical pulse (OTDR’s light source) with a pulse width
of 1 µs and a duty of 1%.
However, for accurate spectrum measurement, the
VBW must be set to a wider bandwidth than the modulation frequency of the measured light. The maximum settable VBW in the MS9710B is 1 MHz. (Refer
to the specifications page for the relationship between
VBW, received light sensitivity and sweep time.)
Tracking with tunable laser source
This function eliminates the need for an external
controller. As shown below, by connecting the TLS
of MG9541A and the MS9710B with an RS-232C
cable, tracking operation is achieved. This setup is
very convenient for measuring the wavelength
transmission characteristics of wide dynamic range
optical elements.
Tracking MG9541A and MS9710B
RS-232C
MG9541A MS9710B
DUT
9
Specifications
Fiber 10/125 µm SM fiber (ITU-T G. 652)
Optical connector*
1
User replaceable: FC, SC, ST, DIN, HMS-10A
Factory option (not user replaceable): E2000 (Diamond), EC (Radial), FC-APC, SC-APC, HRL-10
Range: 600 to 1750 nm
Accuracy: ±0.2 nm (1530 to 1570 nm, after wavelength calibration)
±0.3 nm (600 to 1750 nm, after wavelength calibration)
±0.05 nm (1530 to 1570 nm, resolution: 0.07 to 0.2 nm, after calibration with wavelength reference
light source option)
Accuracy: ±0.1 nm (1530 to 1570 nm, resolution: 0.5 to 1 nm, after calibration with wavelength reference light source
option)
Wavelength
Stability: ±5 pm (smoothing: 11 points, 1 minute, at half-width center wavelength)
Linearity: ±20 pm (1530 to 1570 nm)
Read resolution: 5 pm (display resolution: 1 pm)
Setting resolution: 0.07, 0.1, 0.2, 0.5, 1 nm (filter: 3 dB bandwidth)
Resolution accuracy*
2
: ±≤2.2% (resolution: 0.5 nm, 1550 ±20 nm), ±≤7% (resolution: 0.5 nm, at other wavelength)
±≤3% (resolution: 0.2 nm, 1550 ±20 nm), ±≤15% (resolution: 0.2 nm, at other wavelength)
±≤7% (resolution: 0.1 nm, 1550 ±20 nm), ±≤30% (resolution: 0.1 nm, at other wavelength)
Measurement range:
–65 to +10 dBm ( 600 to 1000 nm, 0˚ to +30˚C, VBW: 10 Hz, sweep averaging: 10 times)
–85 to +10 dBm (1000 to 1250 nm, 0˚ to +30˚C, VBW: 10 Hz, sweep averaging: 10 times)
–90 to +10 dBm (1250 to 1600 nm, 0˚ to +30˚C, VBW: 10 Hz, sweep averaging: 10 times)
–75 to +10 dBm (1600 to 1700 nm, 0˚ to +30˚C, VBW: 10 Hz, sweep averaging: 10 times)
Level –55 to +10 dBm (1700 to 1750 nm, 0˚ to +30˚C, VBW: 10 Hz, sweep averaging: 10 times)
–65 to +20 dBm (1100 to 1600 nm, attenuator: on)
Accuracy:±0.4 dB (1550 nm, –23 dBm, resolution: ≥0.1 nm)
Stability: ±0.02 dB (1300/1550 nm, –23 dBm, resolution: ≥0.1 nm, 1 minute, constant temperature, no polarization shift)
Linearity: ±0.05 dB (1550 nm, 0 to –50 dBm)
Flatness: ±0.1 dB (1530 to 1570 nm)
Polarization dependency ±0.05 dB (1.55 µm band, resolution: ≥0.5 nm), ±0.1 dB (1.3 µm band, resolution: ≥0.5 nm)
70 dB (±1 nm, resolution: 0.07 nm, 1.55 µm band, high-dynamic range mode measurement, 20˚ to 30˚C)
Dynamic range
60 dB (±0.5 nm, resolution: 0.07 nm, 1.55 µm band, high-dynamic range mode measurement, 20˚ to 30˚C)
62 dB (±1 nm, resolution: 0.07 nm, 1.55 µm band, normal mode measurement)
58 dB (±0.5 nm, resolution: 0.07 nm, 1.55 µm band, normal mode measurement)
Optical return loss ≥35 dB (1.3/1.55 µm band)
Sweep
Sweep width: 0, 0.2 to 1,200 nm
Sweep speed*3(typical): 0.5 s (sweep width: 500 nm, normal mode measurement, VBW: 10 kHz)
Display 6.4” color TFT-LCD
Memory A, B (2 trace), 3.5” FDD (for Windows®)
Printer Internal (thermal type)
Interface GPIB, RS-232C
Main functions Optical pulse measurement, power monitor, wavelength auto-calibration
Operating conditions
Operating temperature: 0˚ to +50˚C (FDD: 5˚ to 50˚C), storage temperature: –20˚ to +60˚C,
Relative humidity: ≤90% (no condensation)
Power 85 to 132 Vac/170 to 250 Vac, 47.5 to 63 Hz, 150 VA (max.)
Dimensions and mass 177 (H) x 320 (W) x 350 (D) mm, ≤16.5 kg
EMC EN61326: 1997/A1: 1998 (Class A), EN61000-3-2: 1995/A2: 1998 (Class A), EN61326: 1997/A1: 1998 (Annex A)
LVD EN61010-1: 1993/A2: 1995 (Installation Category II, Pollution degree 2)
◆ MS9710B
*1: One of these connectors is attached. Please specify when ordering.
*2: Actual screen resolution
*3: Typical value for reference; not guaranteed specification
10
Optical output ≥–59 dBm/1 nm (multimode/fiber input)*
1
Wavelength range 900 to 1600 nm
Operating temperature 18˚ to 28˚C
◆ White light source (Option 02)
Wavelength range 1450 to 1650 nm
Output level
>–40 dBm/nm (1550 nm ±10 nm)
>–60 dBm/nm (1450 to 1650 nm)
±0.04 dB (MS9710B setting resolution:
Output level stability*
2
1 nm, no polarization change, constant
temperature, measured for 20 min at
1550 nm)
Spectrum half width >70 nm (typical: 90 nm)
Optical connector
User replaceable type (FC, SC, ST,
DIN, HMS-10/A)
Operating temperature 0˚ to 40˚C
Wavelength reference 1530 nm band Acetylene
◆
Wavelength reference & SLD light source (Option 13)
VBW 10 Hz 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz
Sweep speed (typ.) 30 s 5 s 0.5 s 0.5 s 0.5 s 0.5 s
Minimum light reception sensitivity*
4
–90 dBm –80 dBm –70 dBm –60 dBm –50 dBm –40 dBm
VBW, sweep speed, minimum light reception sensitivity*
3
◆ SLD light source (Option 14)
Wavelength reference 1530 nm band Acetylene
◆ Reference wavelength light source (Option 05)
*1: –65 dBm (typ.) measured with MS9710B (at 1 nm wavelength resolution) which has single-mode fiber at the input
*2: Measured after one hour warm-up
*3: Data for reference; not guaranteed specifications (except tracking with MG9541A)
*4: RMS noise level (1.25 to 1.6 µm)
Note: Warm-up to the MS9710B for about 5 minutes to ensure stable operation.
The above specifications were obtained 2 hours after power-on.
Wavelength range 1450 to 1650 nm
Output level
>–40 dBm/nm (1550 nm ±10 nm)
>–60 dBm/nm (1450 to 1650 nm)
±0.04 dB (MS9710B setting resolution:
Output level stability*
2
1 nm, no polarization change, constant
temperature, measured for 20 min at
1550 nm)
Spectrum half width >70 nm (typical: 90 nm)
Optical connector
User replaceable type (FC, SC, ST,
DIN, HMS-10/A)
Operating temperature 0˚ to 40˚C
11
Ordering Information
Model/Order No. Name
Main frame
MS9710B Optical Spectrum Analyzer
Standard accessories
Optical connector adapter*
1
: 1 pc
Power cord, 2.5 m: 1 pc
F0012 Fuse, 3.15 A (for 100/200 Vac system): 2 pcs
Z0312 Printer paper: 2 rolls
W1283AE MS9710B operation manual: 1 copy
W1284AE Remote control operation manual: 1 copy
MX971002S LabVIEW®driver (RS-232C): 1
MX971002G LabVIEW®driver (GPIB): 1
B0329G Front cover: 1 pc
Options
MS9710B-02 White light source*
2
MS9710B-05 Reference wavelength light source*
2
MS9710B-06 Monitor output (VGA output)
MS9710B-13 Wavelength reference & SLD light source*
2
MS9710B-14 SLD light source*
2
MS9710B-25 FC-APC connector*
3
MS9710B-26 SC-APC connector*
3
MS9710B-27 E2000 (Diamond) connector*
3
MS9710B-31 EC (Radial) connector*
3
MS9710B-37 FC connector*
4
MS9710B-38 ST connector*
4
MS9710B-39 DIN connector*
4
MS9710B-40 SC connector*
4
MS9710B-43 HMS-10/A (Diamond) connector*
4
MS9710B-47 HRL-10 connector*
3
Application parts
J0654A RS-232C cable 9P-9P
J0655A RS-232C cable 9P-25P
J0007 GPIB cable, 1 m
J0617B Replaceable optical connector (FC)
J0618D Replaceable optical connector (ST)
J0618E Replaceable optical connector (DIN)
J0618F Replaceable optical connector (HMS-10/A)
J0619B Replaceable optical connector (SC)
J0635B Optical fiber cord, 2 m
Z0282 Ferrule cleaner
Z0283 Tape for ferrule cleaner
Z0284 Cleaner for optical adapter
B0336C Hard carrying case
G0084A Polarization rotation module (for PMD measurement)
B0330C Tilt stand
Please specify model/order number, name and quantity when ordering.
*1: Specify the connector to be supplied as the standard connector when ordering
the above options. If the connector is not specified, the FC connector
(MS9710B-37) is supplied as standard.
*2: Factory option; Two units cannot be installed simultaneously. Exchangeable-
type optical connectors (FC, SC, ST, DIN, HMS-10/A) are supplied when specified at ordering. One conversion cord is supplied for connecting other optical
connectors to the FC connector.
*3: Factory option
*4: User replaceable
Windows®is a registered trademark of Microsoft Corporation.
LabVIEW®is a registered trademark of National Instruments.
ANRITSU CORPORATION
MEASUREMENT SOLUTIONS
5-10-27, Minamiazabu, Minato-ku, Tokyo 106-8570, Japan
Phone: +81-3 - 3446 - 1111
Telex: J34372
Fax: +81-3 - 3442 - 0235
•
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ANRITSU COMPANY
North American Region Headquarters
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Toll Free: 1- 800 - ANRITSU (267 - 4878)
Phone: +1- 972 - 644 - 1777
Fax: +1-972 - 671 - 1877
•
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ANRITSU ELECTRONICS LTD.
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Nepean, Ontario K2H 9C1, Canada
Phone: +1-613 - 828 - 4090
Fax: +1-613 - 828 - 5400
•
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Rio de Janeiro, RJ, Brasil
Phone: +55-21 - 5276922
Fax: +55-21 - 537 - 1456
•
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Phone: +44-1582 - 433200
Fax: +44-1582 - 731303
•
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ANRITSU GmbH
Grafenberger Allee 54-56, 40237 Düsseldorf, Germany
Phone: +49-211- 96855 - 0
Fax: +49-211- 96855 - 55
•
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ANRITSU S.A.
9, Avenue du Québec Z.A. de Courtabœuf 91951 Les
Ulis Cedex, France
Phone: +33-1 - 60 - 92 - 15 - 50
Fax: +33-1 - 64 - 46 - 10 - 65
•
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ANRITSU S.p.A.
Via Elio Vittorini, 129, 00144 Roma EUR, Italy
Phone: +39-06 - 509 - 9711
Fax: +39-06 - 502 - 24 - 25
•
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ANRITSU AB
Botvid Center, Fittja Backe 1-3 145 84 Stockholm,
Sweden
Phone: +46-853470700
Fax: +46-853470730
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Spain
ANRITSU ELECTRÓNICA, S.A.
Europa Empresarial Edificio Londres, Planta 1, Oficina
6 C/ Playa de Liencres, 2 28230 Las Rozas. Madrid,
Spain
Phone: +34-91 - 6404460
Fax: +34-91 - 6404461
•
Singapore
ANRITSU PTE LTD.
10, Hoe Chiang Road #07-01/02, Keppel Towers,
Singapore 089315
Phone: +65-282 - 2400
Fax: +65-282 - 2533
•
Hong Kong
ANRITSU COMPANY LTD.
Suite 719, 7/F., Chinachem Golden Plaza, 77 Mody
Road, Tsimshatsui East, Kowloon, Hong Kong, China
Phone: +852-2301 - 4980
Fax: +852-2301 - 3545
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Korea
ANRITSU CORPORATION
14F Hyun Juk Bldg. 832-41, Yeoksam-dong,
Kangnam-ku, Seoul, Korea
Phone: +82-2 - 553 - 6603
Fax: +82-2 - 553 - 6604
˜
5
•
Australia
ANRITSU PTY LTD.
Unit 3/170 Forster Road Mt. Waverley, Victoria, 3149,
Australia
Phone: +61-3 - 9558 - 8177
Fax: +61-3 - 9558 - 8255
•
Taiwan
ANRITSU COMPANY INC.
6F, 96, Sec. 3, Chien Kou North Rd. Taipei, Taiwan
Phone: +886-2 - 2515 - 6050
Fax: +886-2 - 2509 - 5519
Specifications are subject to change without notice.
Catalog No. MS9710B-E-A-1-(4.00) Printed in Japan 2001-11 10KL/T
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