Anritsu MS9740B Benchtop Optical Spectrum Analyzer, 600 nm to 1750 nm

Benchtop optical spectrum analyzer covering 600 nm to 1750 nm with wide dynamic range, 30 pm resolution and fast sweep for active optical device testing.

Supported optical fiber: SM fiber (ITU-T G.652), 50 μm/125 μm GI fiber, PC Connector (reflection attenuation 40 dB or more)
Optical connector: User replaceable: FC, SC, ST, DIN (All connectors are PC polished.)
Maximum input power: +23 dBm
Optical return loss: ≥35 dB

Datasheet

Overview

The Anritsu MS9740B is a benchtop optical spectrum analyzer that covers a wavelength range of 600 nm to 1750 nm. It combines a wide dynamic range, high resolution and fast sweep speeds. It accepts multimode fiber input and is suited to the manufacture and evaluation of 850 nm band VCSEL modules, optical transceivers, DFB light sources and other active optical devices.

The MS9740B keeps the functions and performance of the earlier MS9740A. Anritsu states that it cuts measurement processing time by up to half at the receiver bandwidth settings most used on production lines (1 kHz and 200 Hz), without losing measurement sensitivity. Processing time is the total time for the wavelength sweep, the analysis and the data transfer to an external controller.

Application modes

The instrument has nine application menus: DFB-LD, FP-LD, LED, PMD, Opt. Amp, Opt. Amp (Multi-channel), WDM, LD Module and WDM Filter. Each one measures the key test items at once, such as center wavelength, level, OSNR, SMSR and spectrum width, and shows all the results on one screen. The WDM application evaluates up to 300 channels. The EDFA applications calculate gain and noise figure and support the IEC-recommended ISS method.

Pulsed light measurement

With option MS9740B-020, the analyzer can measure the spectrum of pulsed LD output under asynchronous conditions, without a trigger signal, in about the same time as a CW measurement. This supports thermal management in high-output LD chip production.

Calibration and connectivity

The instrument has automatic optical axis alignment, wavelength calibration and effective resolution calibration. The optional built-in Light Source for Wavelength Calibration (MS9740B-002) provides ±20 pm wavelength accuracy from 1520 nm to 1620 nm. Remote control is available over Ethernet or GPIB (MS9740B-001). The instrument accepts almost all remote commands of the MS9740A, MS9710 and MS9780 series. A Remote Tools Package provides sample programs, a C# class library and a LabVIEW driver.

Key Features

Wavelength measurement range 600 nm to 1750 nm
Measurement processing time cut by up to half compared with the MS9740A
SMSR measurement at 45 dB minimum
Maximum measurement processing time of 0.35 s when sweeping 30 nm in Fast mode
±1.4 dB SMSR reproducibility with MS9740B-020 (±1.8 dB with MS9740B-009 installed)
30 pm minimum resolution
–90 dBm lowest optical sensitivity
Dynamic range >58 dB at ±0.4 nm from peak wavelength
±20 pm wavelength accuracy (1520 nm to 1620 nm) with Light Source for Wavelength Calibration MS9740B-002
Nine application modes: DFB-LD, FP-LD, LED, PMD, Opt. Amp, Opt. Amp (Multi-channel), WDM, LD Module, WDM Filter
WDM signal evaluation for up to 300 channels
Supports SM and MM fiber input; LC connectors supported using an adapter
Signal level integration function for modulated signals
Noise fitting function for accurate noise position estimation
Waveform memory for 10 traces (A to J) per file and up to 1000 files in internal memory
Max Hold, Min Hold, Overlap and Calculate trace display modes
Six USB ports (two front, four rear)
Remote control over Ethernet and GPIB (MS9740B-001)
Backward compatibility with MS9740A, MS9710 and MS9780 series remote commands
8.4-inch SVGA color LCD with Windows GUI and VGA output
Under 15 kg and under 100 VA power consumption
Built-in OS recovery image

Specifications

Optical Input

Supported optical fiber	SM fiber (ITU-T G.652), 50 μm/125 μm GI fiber, PC Connector (reflection attenuation 40 dB or more) Connecting 50 μm/125 μm multimode fiber degrades the minimum light reception sensitivity; MM mode corrects the level by 14 dB (sum)
Optical connector	User replaceable: FC, SC, ST, DIN (All connectors are PC polished.)
Maximum input power	+23 dBm Optical ATT: On
Optical return loss	≥35 dB Using SM fiber with wavelength of 1300 nm and 1550 nm

Wavelength

Wavelength measurement range	600 nm to 1750 nm
Wavelength accuracy	±20 pm (1520 nm to 1620 nm, Resolution: 0.03 nm to 0.2 nm) Built-in MS9740B-002, after Wl cal (ref) wavelength calibration execution, at stable room temperature
Wavelength accuracy	±100 pm (1520 nm to 1620 nm, Resolution: 0.5 nm, 1.0 nm) Built-in MS9740B-002, after Wl cal (ref) wavelength calibration execution, at stable room temperature
Wavelength accuracy	±300 pm (600 nm to 1520 nm), ±200 pm (1520 nm to 1570 nm), ±300 pm (1570 nm to 1750 nm) After Wl cal (Ext) wavelength calibration execution by external light source, such as Single Longitudinal mode laser (DFB-LD)
Wavelength stability	±5 pm (1 min, smoothing: 11 pt, at center wavelength of half maximum, Using SM fiber)
Wavelength linearity	±20 pm (1520 nm to 1620 nm)
Setting resolution	0.03, 0.05, 0.07, 0.1, 0.2, 0.5, 1.0 nm RBW: 3 dB optical filter: transmission bandwidth
Resolution accuracy (1520 nm to 1620 nm)	±7% (Resolution: 0.1 nm), ±3% (Resolution: 0.2 nm), ±2.2% (Resolution: 0.5 nm) Effective resolution, after Res-cal, using SM fiber
Resolution accuracy (600 nm to 1520 nm, 1620 nm to 1750 nm)	±30% (Resolution: 0.1 nm), ±15% (Resolution: 0.2 nm), ±7% (Resolution: 0.5 nm) Effective resolution, after Res-cal, using SM fiber

Level

Measurement range (Optical Att: Off, 5°C to 30°C)	–65 to +10 dBm (600 nm to 1000 nm), –85 to +10 dBm (1000 nm to 1250 nm), –90 to +10 dBm (1250 nm to 1600 nm), –85 to +10 dBm (1600 nm to 1650 nm), –65 to +10 dBm (1650 nm to 1700 nm), –55 to +10 dBm (1700 nm to 1750 nm) VBW: 10 Hz, Sweep average: 10, Resolution: 0.07 nm to 1.0 nm, using SM fiber
Measurement range (Optical Att: Off, 30°C to 45°C)	–60 to +10 dBm (600 nm to 1000 nm), –80 to +10 dBm (1000 nm to 1250 nm), –85 to +10 dBm (1250 nm to 1600 nm), –80 to +10 dBm (1600 nm to 1650 nm), –60 to +10 dBm (1650 nm to 1700 nm), –50 to +10 dBm (1700 nm to 1750 nm) VBW: 10 Hz, Sweep average: 10, Resolution: 0.07 nm to 1.0 nm, using SM fiber
Measurement range (Optical Att: On, 5°C to 30°C)	–70 to +23 dBm (1100 nm to 1600 nm) VBW: 10 Hz, Sweep average: 10, Resolution: 0.07 nm to 1.0 nm, using SM fiber
Measurement range (Optical Att: On, 30°C to 45°C)	–65 to +23 dBm (1100 nm to 1600 nm) VBW: 10 Hz, Sweep average: 10, Resolution: 0.07 nm to 1.0 nm, using SM fiber
Level accuracy	±0.4 dB (Wavelength: 1310 nm, 1550 nm, Input: –10 dBm, Resolution: 0.1 nm to 1.0 nm) Using Anritsu's reference single mode fiber with FC/UPC connector, 23°C ±5°C
Level stability	±0.02 dB (1 min, Wavelength: 1550 nm, Input: –23 dBm, Resolution: 0.1 nm to 1.0 nm, no polarization fluctuation)
Level linearity	±0.05 dB (Wavelength: 1550 nm, Input: –50 to 0 dBm, Optical Att: Off), ±0.05 dB (Wavelength: 1550 nm, Input: –30 to +20 dBm, Optical Att: On)
Level flatness	±0.1 dB (Wavelength: 1520 nm to 1620 nm, Resolution: 0.5 nm, Optical Att: Off) 10°C to 30°C
Polarization dependency	±0.05 dB (Wavelength: 1550 nm/1600 nm), ±0.1 dB (Wavelength: 1310 nm) Resolution: 0.5 nm, 1.0 nm
Dynamic range (High dynamic range)	70 dB (±1 nm from peak wavelength), 60 dB (±0.4 nm from peak wavelength), 42 dB (±0.2 nm from peak wavelength) Wavelength: 1550 nm, Resolution: 0.05 nm, Optical Att: Off, 20°C to 30°C
Dynamic range (Normal dynamic range)	62 dB (±1 nm from peak wavelength), 58 dB (±0.4 nm from peak wavelength), 42 dB (±0.2 nm from peak wavelength) Wavelength: 1550 nm, Resolution: 0.05 nm, Optical Att: Off, 20°C to 30°C

Sweep

VBW setting	1 MHz, 100 kHz, 10 kHz, 2 kHz, 1 kHz_Fast, 1 kHz, 200 Hz_Fast, 200 Hz, 100 Hz, 10 Hz
Sweep width	0.2 nm to 1200 nm, 0 nm
Sweep time	≤0.2 s (span: 5 nm, Resolution: 0.1 nm), ≤0.3 s (span: 500 nm) VBW: 10 kHz, Normal dynamic range, center 1550 nm (span: 5 nm), 1200 nm (span: 500 nm), sweep start to stop, no optical input, sampling point: ≤501
Sweep time (VBW 1 kHz-Fast)	0.35 s/30 nm (typ.) VBW: 1 kHz-Fast, dynamic range, center 1550 nm, Resolution: 0.1 nm, sweep start to stop, optical input –10 dBm, sampling point: 1001
Sweep time (VBW 200 Hz-Fast)	1.65 s/30 nm (typ.) VBW: 200 Hz-Fast, dynamic range, center 1550 nm, Resolution: 0.1 nm, sweep start to stop, optical input –10 dBm, sampling point: 1001. Web page shows '1,65 s'

VBW vs Sweep Time and Minimum Optical Reception Sensitivity (Reference)

Sweep time (typ.)	32 s (10 Hz), 3.5 s (100 Hz), 2 s (200 Hz), 0.5 s (1 kHz), 0.3 s (2 kHz), 0.2 s (10 kHz), 0.2 s (100 kHz), 0.2 s (1 MHz) Reference value, not guaranteed. Center wavelength: 1200 nm, Span: 200 nm, No. of samples: 501, Normal dynamic range, Point Avg. 1, No optical input
Sweep time, Fast mode (typ.)	1 s (200 Hz), 0.25 s (1 kHz) Reference value, not guaranteed. Center wavelength: 1200 nm, Span: 200 nm, No. of samples: 501
Min. optical reception sensitivity	–90 dBm (10 Hz), –80 dBm (100 Hz), –76 dBm (200 Hz), –70 dBm (1 kHz), –66 dBm (2 kHz), –60 dBm (10 kHz), –50 dBm (100 kHz), –40 dBm (1 MHz) Reference value, not guaranteed. Wavelength range: 1250 nm to 1600 nm, Resolution: >0.07 nm, Optical attenuator OFF, Sweep Avg. 10, SM fiber, 5°C to 30°C

Display and Functions

Display	800 × 600 dots, 8.4 inch SVGA color LCD
Measurement functions	Auto Measure, Optical pulse measurement (External trigger), Power monitor
Display functions	Normalized, Max Hold, Min Hold, Overlap, Value in Air/Vacuum, Effective Resolution, Multi fiber mode
Analysis functions	Wavelength Subtraction, Marker, Wavelength Analysis (Threshold, ndB-Loss, Envelope, RMS, SMSR, Spectrum Power), Light Source Evaluation (FP-LD, DFB-LD, LED, LD Module), Optical AMP NF Evaluation, PMD Measurement, WDM Signal Evaluation, WDM Filter Analysis
Calibration functions	Auto Align, Wavelength cal., Level offset, Wavelength offset
Memory function	Display measurement data to memory A to J (10 waveforms)

Interfaces

Interfaces	Ethernet, GPIB (MS9740B-001)
I/O	Save and read files to USB memory
Input	External trigger terminal (0 to 0.8 V/2 V to 5 V, high impedance)
Output	Measured data text file output, measurement screen file (BMP, PNG) output, VGA output
Remote control interfaces	Ethernet, GPIB (MS9740B-001) Ethernet remote control requires a VISA driver on the PC controller
USB ports	Six USB ports (two on front and four on rear)

General

Operating conditions	Operating temperature: +5°C to +45°C, Storage temperature: –20°C to +60°C, Relative humidity: 0 to 90% (no condensation)
Power supply	100 V(ac) to 120 V(ac)/200 V(ac) to 240 V(ac), 50 Hz to 60 Hz, ≤100 VA
Dimensions and mass	426 (W) × 177 (H) × 350 (D) mm (excluding projections), ≤15.0 kg (without options)
OS	Windows
CE	EMC 2014/30/EU, EN61326-1, EN61000-3-2; LVD 2014/35/EU, EN61010-1; RoHS 2011/65/EU, (EU) 2015/863, EN IEC 63000: 2018
UKCA	EMC S.I. 2016 No.1091, EN 61326-1, EN61000-3-2; LVD S.I. 2016 No.1101, EN 61010-1; RoHS S.I. 2012 No.3032, EN IEC 63000:2018

Multimode Fiber Interface (50/62.5 μm) MS9740B-009

Supported optical fiber MS9740B-009	SM fiber (ITU-T G.652), 50 μm/125 μm GI fiber, 62.5 μm/125 μm GI fiber, PC Connector SM (ITU-T G.652), GI (50 μm/125 μm): reflection attenuation 40 dB or more, GI (62.5 μm/125 μm): reflection attenuation 38 dB or more The NA is 0.2 for 50 μm/125 μm GI fiber and 0.275 for 62.5 μm/125 μm GI fiber
Wavelength measurement range MS9740B-009	600 nm to 1750 nm
Wavelength accuracy MS9740B-009	±50 pm (1530 nm to 1570 nm) Built-in MS9740B-002, after Wl Cal (Ref), with SM fiber and resolution at 0.07 nm to 0.2 nm
Wavelength accuracy MS9740B-009	±100 pm (1530 nm to 1570 nm) Built-in MS9740B-002, after Wl Cal (Ref), with SM fiber and resolution at 0.5 nm/1.0 nm
Wavelength accuracy MS9740B-009	±300 pm (600 nm to 1750 nm) After Wl cal (Ext) by external light source, such as DFB-LD, using SM or GI fiber. Datasheet range differs from web page, which states ±300 pm (1570 nm to 1750 nm)
Wavelength stability MS9740B-009	±5 pm (1 min, smoothing: 11 pt, at center wavelength of half maximum, Using SM fiber)
Setting resolution MS9740B-009	0.07, 0.1, 0.2, 0.5, 1.0 nm RBW: 3 dB optical filter: transmission bandwidth
Resolution accuracy MS9740B-009	±30% (Resolution: 0.1 nm), ±15% (Resolution: 0.2 nm), ±7% (Resolution: 0.5 nm) After Res-cal, using SM fiber, 633/1310/1550 nm
Measurement range (Optical Att: Off, 5°C to 30°C) MS9740B-009	–65 to +10 dBm (600 nm to 1000 nm), –85 to +10 dBm (1000 nm to 1250 nm), –90 to +10 dBm (1250 nm to 1600 nm), –75 to +10 dBm (1600 nm to 1700 nm), –55 to +10 dBm (1700 nm to 1750 nm) VBW: 10 Hz, Sweep average: 10, Resolution: 0.07 nm to 1.0 nm, using SM fiber
Measurement range (Optical Att: Off, 30°C to 45°C) MS9740B-009	–60 to +10 dBm (600 nm to 1000 nm), –80 to +10 dBm (1000 nm to 1250 nm), –85 to +10 dBm (1250 nm to 1600 nm), –70 to +10 dBm (1600 nm to 1700 nm), –50 to +10 dBm (1700 nm to 1750 nm) VBW: 10 Hz, Sweep average: 10, Resolution: 0.07 nm to 1.0 nm, using SM fiber
Measurement range (Optical Att: On) MS9740B-009	–70 to +23 dBm (1100 nm to 1600 nm) [5°C to 30°C], –65 to +23 dBm (1100 nm to 1600 nm) [30°C to 45°C] VBW: 10 Hz, Sweep average: 10, Resolution: 0.07 nm to 1.0 nm, using SM fiber
Level accuracy MS9740B-009	±0.6 dB (Wavelength: 1310 nm, 1550 nm, Input: –10 dBm, Resolution: 0.2 nm to 1.0 nm, using SM fiber) Using Anritsu's reference single mode fiber with FC/UPC connector, 23°C ±5°C
Level stability MS9740B-009	±0.1 dB (1 min, Wavelength: 1550 nm, Input: –23 dBm, Resolution: 0.2 nm to 1.0 nm, no polarization fluctuation, using SM fiber, at stable room temperature)
Level linearity MS9740B-009	±0.1 dB (Wavelength: 1550 nm, Input: –50 to 0 dBm, using SM fiber, Optical Att: Off), ±0.1 dB (Wavelength: 1550 nm, Input: –30 to +20 dBm, using SM fiber, Optical Att: On)
Dynamic range (High dynamic range) MS9740B-009	70 dB (±1 nm from peak wavelength, 20°C to 30°C), 60 dB (±0.5 nm from peak wavelength, 20°C to 30°C), 65 dB (±1 nm from peak wavelength, 5°C to 45°C), 55 dB (±0.5 nm from peak wavelength, 5°C to 45°C) Wavelength: 1550 nm, Resolution: 0.07 nm, using SM fiber, Optical Att: Off
Dynamic range (Normal dynamic range) MS9740B-009	62 dB (±1 nm from peak wavelength, 20°C to 30°C), 58 dB (±0.5 nm from peak wavelength, 20°C to 30°C), 57 dB (±1 nm from peak wavelength, 5°C to 45°C), 53 dB (±0.5 nm from peak wavelength, 5°C to 45°C) Wavelength: 1550 nm, Resolution: 0.07 nm, using SM fiber, Optical Att: Off
Optical return loss MS9740B-009	≥32 dB (Wavelength: 1310 nm, 1550 nm, using SM fiber)
Sweep time MS9740B-009	≤0.2 s (span: 5 nm, Resolution: 0.1 nm), ≤0.3 s (span: 500 nm); 0.35 s/30 nm (typ.) at VBW 1 kHz- Fast; 1.65 s/30 nm (typ.) at VBW 200 Hz-Fast Same conditions as the MS9740B mainframe sweep specifications

Pulsed Light Measurement MS9740B-020

SMSR reproducibility MS9740B-020	±1.4 dB (MS9740B), ±1.8 dB (with MS9740B-009 installed) SM fiber, DFB-LD 1550 nm at 10 dBm peak power, 45 dB max SMSR, no polarization change; pulse ≥5 kHz repetition, ≥1% duty; Pulse Mode, 1 kHz VBW, 0.1 nm resolution, ≤10 nm span, 501 points, 23°C ±5°C

Light Source for Wavelength Calibration MS9740B-002

Supported optical fiber MS9740B-002	SM fiber (ITU-T G.652)
Optical connector MS9740B-002	User replaceable: FC, SC, ST, DIN (All connectors are PC polished.)
Output level MS9740B-002	–40 dBm/nm Reference wavelength, 10°C to 30°C, Wavelength: 1550 nm ±20 nm, Resolution: 1 nm
Output level stability MS9740B-002	±0.04 dB 10 minutes after power-on, Wavelength: 1550 nm, Resolution: 1 nm, VBW: 100 Hz, Point Avg.: 20, Measurement time: 1 minute
Laser safety MS9740B-002	Class 1 (IEC 60825-1: 2014)

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

Applications

850 nm band VCSEL module manufacturing and evaluation
Optical transceiver and LD module testing
DFB-LD and FP-LD spectrum analysis
LED and wideband light source evaluation
LD chip and CAN device evaluation
Pulsed optical spectrum measurement of high-output LDs
WDM signal and OSNR analysis
EDFA gain and noise figure evaluation
Optical bandpass filter and WDM filter analysis
Passive optical device evaluation (FBG, AWG, OBPF)
PMD characteristics evaluation of optical fiber

Included

Z2024A MS9740B Operation Manual (CD): 1 pc
Power Cord: 1 pc
One optical connector for the optical input port (specified at order)

Options & Accessories

Option	Description
MS9740B-037	FC Connector — Optical connector for the optical input port; specify one when ordering
MS9740B-038	ST Connector — Optical connector for the optical input port; specify one when ordering
MS9740B-039	DIN 47256 Connector — Optical connector for the optical input port; specify one when ordering
MS9740B-040	SC Connector — Optical connector for the optical input port; specify one when ordering
MS9740B-001	GPIB Interface
MS9740B-101	GPIB Interface Retrofit
MS9740B-002	Light Source for Wavelength Calibration — Executing wavelength calibration with this option secures ±20 pm (1520 nm to 1620 nm, without MS9740B-009) accuracy
MS9740B-102	Light Source for Wavelength Calibration Retrofit
MS9740B-009	Multimode Fiber Interface (50/62.5 μm) — Factory option; retrofit not supported
MS9740B-020	Pulsed Light Measurement — Retrofit supported as charged software option (retrofit number Option-320)
MS9740B-108	OS Upgrade to Win10 Retrofit — Upgrades Windows Embedded Standard 7 to Windows 10 Enterprise LTSC; performed by Anritsu factory or service center return
Z2163A	USB Stick for Retrofit Options
W3998AE	MS9740B Optical Spectrum Analyzer Operation Manual (Printed)
W3999AE	MS9740B Optical Spectrum Analyzer Remote Control Operation Manual (Printed)
W4000AE	MS9740B Optical Spectrum Analyzer Remote Control Operation Manual (Printed)
J0617B	Replaceable Optical Connector (FC-PC)
J0618D	Replaceable Optical Connector (ST)
J0618E	Replaceable Optical Connector (DIN)
J0619B	Replaceable Optical Connector (SC)
J1530A	SC Plug-in Converter (UPC(P)-APC(J))
J1532A	FC Plug-in Converter (UPC(P)-APC(J))
J0635B	FC · PC-FC · PC-2M-SM (Optical Fiber Cord, 2.0 m)
J0660B	SC · PC-SC · PC-2M-SM (Optical Fiber Cord, 2.0 m)
J0893A	FC · PC-FC · PC-1M-GI (Optical Fiber Cord, 1.0 m)
J0893B	FC · PC-FC · PC-2M-GI (Optical Fiber Cord, 2.0 m)
J1534A	LC-SC Plug-in Converter (for SM, SC(P)-LC(J))
Z0914A	Ferrule Cleaner
Z0915A	Replacement Reel for Ferrule Cleaner
Z0284	Adapter Cleaner (Stick Type)
B0640C	Carrying Case — Includes a Front Panel Protective Cover (B0671A)
B0671A	Front Cover for 1MW4U
B0641A	Rack Mount Kit
J0008	GPIB Cable, 2.0 m
Z0541A	USB Mouse
Z0975A	Keyboard (USB)