AQ6370 Viewer

The AQ6370 Viewer is a package of PC application software for PC-based analysis and measurement with the AQ6380, the AQ6370 series and the AQ6360 Optical Spectrum Analyzer.
We offer a trial version of the software, in which all the functions are available for 30 days.

The AQ6370 Viewer is a package of PC application software for the AQ6380, the AQ6370 series and the AQ6360 Optical Spectrum Analyzer.

  • The same user interface and functions as the mainframe
  • Display and analyze waveform data acquired by the mainframe
  • Remote control and file transfer capability

The model-specific Viewer and the Common Viewer

In addition to the current model-specific viewer, a new model common viewer (OSA Viewer) has been added.

The Common Viewer (OSA Viewer)

OSA Viewer can operate multiple model-specific Viewer with a single software.
Multiple OSA Viewers can be operated on a PC and multiple optical spectrum analyzers can be controlled via Ethernet.

The OSA Viewer supports the following optical spectrum analyzers.
  AQ6380 Series:AQ6380
  AQ6360 Series:AQ6360
  AQ6370 Series:AQ6370C/AQ6370D/AQ6370E
  AQ6373 Series:AQ6373/AQ6373B/AQ6373E
  AQ6374 Series:AQ6374/AQ6374E
  AQ6375 Series:AQ6375/AQ6375B/AQ6375E
  AQ6376 Series:AQ6376/AQ6376E
  AQ6377 Series:AQ6377

Note: It does not support the AQ6370 or AQ6370B.

OSA Viewer

A navigation menu of OSA Viewer

The model-specific Viewer

Depending on the model viewer installed on the PC, the same analysis as the optical spectrum analyzer can be performed on the PC screen. One PC can control one optical spectrum analyzer via Ethernet.
Example: If you are using AQ6370D, please use AQ6370D Viewer.

Examples of the model-specific Viewer
(AQ6370D Viewer)

Display of Saved Measurement Data

  • Saved measurement data can be displayed and confirmed on a PC. *1
  • When reading waveforms, files can be quickly selected from the Thumbnail File Preview.
  • Waveforms can be saved as graphic files on a PC.
  • Waveforms can be printed out from a printer connected to the PC

*1: Waveform data of previous models (AQ-6315, AQ6317, and AQ6319 Series),
whose formats are .WV*/.TXT, can be used. The displayable wavelength range is 600-1700 nm, which is the measurable wavelength range of Optical Spectrum Analyzer AQ6370 and AQ6370B/C/D.

AQ6370 Viewer 1 1


Data Analysis

  • Analysis identical to AQ6370 Series can be performed on a PC. *2
  • Analysis results can be saved to a PC.

Major Analysis Functions of AQ6370 Viewer

  • Peak/bottom search
  • Analysis of spectrum widths (Threshold, Envelope, RMS, Peak RMS, and Notch)
  • WDM (OSNR) analysis, EDFA-NF analysis, filter peak/bottom analysis, WDM filter peak/bottom analysis, DFB-LD analysis, FP-LD analysis, LED analysis, SMSR analysis, power analysis, and PMD analysis
  • Pass/Fail Judgment using the template function
AQ6370 Viewer 3

*2 When reading the waveforms of an analyzer other than the AQ6370, the accuracy of analysis results and readings cannot be guaranteed with regard to power analysis, LED analysis, WDM analysis, EDFA-NF analysis, and conversion of the unit to dBm/nm (dBm is represented by the vertical axis.)


Real-time Remote Control

  • Real-time acquisition and display of measured waveforms using AQ6370 series' remote control with Ethernet LAN.
  • Acquired measurement data can be stored in or analyzed on a PC.

AQ6370 Viewer 4

Enhancing manufacturing quality through trouble analysis of manufacturing lines and the monitoring of long-term tests.

File Transfer

  • Files saved in the internal memory of AQ6370 series can be transferred to a PC.
  • Programs edited using AQ6370 Viewer can be transferred to AQ6370 series.
  • Improved data and program management quality

AQ6370 Viewer 6

PC Requirements

A PC running following operating system with at least 256 MB of memory (512 MB or more recommended).

Operating System

  • Windows 10 (32bit / 64bit)
  • Windows 11 (64 bit)

CD-ROM Drive
A CD-ROM drive is required to install this software program.

1024 × 768 pixels, 65536 colors or more

* Windows Vista, Windows 7, Windows 8 / 8.1 and Windows 10 are registered trademarks of Microsoft Corporation of the United States

Ordering Information

Model Description
735371 AQ6370 Viewer

Caution Image TnCaution - For the correct and safe use of this product, please read the instruction manual carefully.


  • Display of saved waveform data
  • Data analysis
  • Real-time remote control
  • File transfer
  • Management of large-volumes of measurement data
  • Data analysis from remote locations
  • Preparation of test reports
  • Measurement from remote locations



In this poster session research from The European Conference on Lasers and Electro-Optics 2017, researchers from Texas A&M University, Texas A&M University at Qatar, and Florida A&M University use a Yokogawa Test&Measurement AQ6376 Optical Spectrum Analyzer to detect methane in the air.


In a research paper published in Optics Letters on the Optica (OPG) website, researchers from Harbin Engineering University, the University of Limerick, and the Technological University Dublin use a Yokogawa Test&Measurement AQ6370C Optical Spectrum Analyzer to test fiber components for potential use in integrated optical sources, including lasers.


In research published on IEEE Xplore, researchers from Harbin Engineering University, the University of Limerick, and the Technological University Dublin use a Yokogawa Test&Measurement AQ6370C Optical Spectrum Analyzer to measure wavelengths when fiber is subjected to temperature changes.


University of Central Florida researcher uses a Yokogawa Test&Measurement AQ6370B Optical Spectrum Analyzer to map the properties of a new silicon waveguide fiber.

Instruction Manuals

Product Overviews


    Introducing the new Yokogawa Test&Measurement AQ6380 Optical Spectrum Analyzer. This new OSA includes many sought-after features including:

    • An unprecedented 5 pm wavelength resolution
    • ±5 pm wavelength accuracy
    • 1200 nm to 1650 nm wavelength range
    • 65 dB wide close-in dynamic range
    • 80 dB stray light suppression
    • Automated wavelength calibration
    • Gas purging
    • DUT-oriented interface and test apps
    • Backward-compatible remote interface
    • 10.4in intuitive touchscreen
    • Up to 20x faster measurement
    • Remote operation capabilities



    Application Engineer Danielle walks us through how to use an optical spectrum analyzer (OSA) to measure a gas cell in just a few easy steps.


    We are going live on YouTube to answer your questions about the Yokogawa Test&Measurement AQ6370 Series of optical spectrum analyzers. Join us to discuss how to make the most of these versatile instruments based on your optical application needs. A few examples are fiber testing, laser/LED testing, LiDAR, optical passive components (filters), and optical transmission equipment (DWDM, CWDM). Whether you’ve worked with an OSA for years or curious if it is a good fit for your work or research, this live stream can help.

    Potential items for review include but are not limited to:

    • Span
    • Sweep
    • Calibration
    • Analysis
    • Cursors/Markers
    • PC-Based Remote Viewing Software



    There are countless technologies available for optical communications devices and systems validation. With so many specifics to take into consideration, it's not always easy for an engineer to determine the best networking and fiber optic measurement solution to address their measurement needs.

    Key discussions in this on-demand webinar include:

    • The what, why, and how of available options like optical spectrum analyzers, optical wavelength meters, optical power meters, variable attenuators, fixed and tunable laser sources, and more
    • How to improve the quality and value of results for both active and passive optical devices
    • Ways to streamline productivity and reduce costs while also achieving higher data transmission rates, longer-distance transmissions, immunity to EMI, lower signal loss, lower latency, enhanced security, and improved energy efficiency
    • Trends driven by applications such as AI, quantum, and inter-satellite laser communications (i.e., space lasers!)

    Mastering the fundamentals of optical wavelength measurements and having a solid understanding of measurement principles for optical sources and devices is key to measuring with confidence. This webinar provides a thorough review of these foundational elements and concepts as well as:

    • Fiber identification and recommendations for routine care
    • Measurement techniques for different optical measurement devices
    • Example wavelength-specific applications for visible light to over 3000 nm such as telecommunications, biomedical, and atmospheric gas sensing
    • Important considerations for selecting an optical spectrum analyzer

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