AQ6373B 2017-10-04T15:10:45+00:00

AQ6373B – Optical spectrum analyzer

VISIBLE WAVELENGTH optical spectrum analyzer

The AQ6373B is one of the latest additions to the AQ6370 Series of Optical Spectrum Analyzers. With the ability to provide high speed, accurate analysis of the short wavelength range between 350nm and 1200nm, this OSA is well suited for a broad range of applications.

The AQ6373B can accelerate the development and manufacturing of short wavelength lasers, passive devices and LEDs as well as equipment that uses these devices for the biomedical, material processing, consumer product and telecommunications markets. With built in color analysis capabilities and remote command compatibility with the AQ6315, the AQ6373B provides an upgrade of capabilities, speed and performance for current AQ6315 users

Key feature summary

  • Wavelength range: 350 to 1200nm
  • Wavelength accuracy: ±0.05 nm
  • Wavelength resolution: 0.02 to 10 nm and 0.01nm (400 to 470nm)
  • Max safe input power: +20 dBm
  • Level sensitivity: -80 dBm
  • Dynamic range: ≥60dB
  • Single-mode, Multimode, and Large-core fibers
  • Built-in optical alignment source
  • Wavelength calibration with an external reference source
  • Various analysis functions including the Color analysis function for VIS

Items Specifications
Wavelength range *1 350 to 1200 nm
Span *1 0.5 nm to 850 nm (full span), and 0 nm
Wavelength accuracy *1 ±0.05 nm (633 nm), ±0.20 nm (400 to 1100 nm) (After wavelength calibration with 633 nm He-Ne laser.)
Wavelength resolution setting *1, *2 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10 nm (full range), and 0.01 nm (400 to 470 nm)
Minimum sampling resolution *1 0.001 nm
Number of sampling 101 to 50001, AUTO
Level sensitivity setting NORM_HOLD, NORM_AUTO, NORMAL, MID, HIGH1, HIGH2 and HIGH3
High dynamic mode SWITCH (Sensitivity: MID, HIGH1-3)
Level sensitivity *3 −80 dBm (500 to 1000 nm), −60 dBm (400 to 500 nm, 1000 to 1100 nm)(Typical, Resolution setting: ≥ 0.2 nm, Averaging: 10 times,Sensitivity: HIGH3)
Maximum safe input power *3 +20 dBm (550 to 1100 nm), +10 dBm (400 to 550 nm) (Total input power)
Level accuracy *2 ±1.0 dB (850 nm, Input level: −20 dBm, Resolution setting: ≥ 0.2 nm, Sensitivity: MID, HIGH1-3, SMF [MFD 5 μm@850 nm, NA0.14])
Level linearity *3 ±0.2 dB (Input level: −40 to 0 dBm, Sensitivity: HIGH1-3)
Dynamic range *1 60 dB (Peak ±0.5 nm, Resolution setting: 0.02 nm, 633 nm, Sensitivity: HIGH1-3)
Applicable fiber SM, GI (50/125 µm, 62.5/125 µm), Large core fiber (up to 800 μm)
Optical connector FC type (Optical input and Calibration output)
Built-in calibration light source Optical alignment source (for optical alignment. Wavelength reference is not equipped.)
Sweep time *1,*4 NORM_ AUTO: 0.5 sec, NORMAL: 1 sec, MID: 2 sec, HIGH1: 5 sec, HIGH2: 20 sec, HIGH3: 75 sec
Warm-up time Minimum 1 hour (After warming up, optical alignment adjustment with built-in light source is required.)

*1: Horizontal scale: Wavelength display mode.
*2: Actual wavelength resolution varies according to a measured wavelength. Actual resolution at 10 nm
resolution setting is about 8 nm at most.
*3: Vertical scale: Absolute power display mode.
*4: High dynamic mode: OFF, Number of sampling: 1001, Average number: 1, Span: ≤ 100 nm excluding
450 to 470 nm and 690 to 700 nm.

High Resolution & High Dynamic Range

AQ6373B-resolutionx300The advanced monochromator achieves high wavelength resolution and high close-in dynamic range. With the sharper spectral characteristics of the monochromator, spectral signals in close proximity can be separated clearly and measured accurately.

See picture to the right: 405 nm FP-LD measurement (resolution setting: 0.01 nm)

High Sensitivity

Weak optical signals can be measured accurately and quickly.

7 sensitivity settings

Can be selected according to test applications and measurement speed requirements.

High dynamic mode

Obtains a better dynamic range by reducing the influence of stray-light, which is caused when the input is a strong optical signal.

Pulsed Light Measurement

Peak-Hold and External trigger mode

Measure a pulse peak spectrum of a pulsed light signal. Often used in the transmission loop testing of telecommunication systems, and also in the low power measurement at the early stage of laser chip development to catch the peak power of a pulsed signal.

Free Space InputAQ6373B-inputstructurex300

    • Multimode and single mode fiber on the same OSA
    • Small insertion loss variation at the input connector increases measurement repeatability.
    • No damage connecting fibers because there is no physical contact.
    • Supports SM, GI (50/125 μm, 62.5/125 μm) and large core fiber up to 800 μm. Optical input structure.

See pictures to the right: Optical input structure (note. AQ6373B uses a fixed connector)

Fast Sweep

With an advanced monochromator, faster electrical circuits, and noise reduction techniques, the AQ6373B achieves fast measurement speed even when measuring a steep spectrum from DFB-LD signals, or when measuring a low power signal from a broadband light source.

Wide Span Sweep yet High Resolution

The 50,001 data sampling points expands measurement range in a single sweep while keeping a high wavelength resolution. This makes your measurements easier and more efficient than conventional systems that use a low number of sampling points and require multiple partial measurements to cover the complete wavelength range.

Easy to Keep Accurate

Ambient condition change, vibration and shock to an optical precision product, like an optical spectrum analyzer, will effect the optical components and eventually degrade optical performance. Using standard functions, the AQ6373B can maintain its high optical performance within a couple of minutes so that you can quickly start a measurement.

Optical alignment function

Automatically aligns the optical path in the monochromator using the built-in source to maintain high performance.

Wavelength calibration function

Automatically calibrates the spectrum analyzer with an external light source, to ensure the wavelength accuracy.

Built-in optical alignment source

Note. GI 50/125µm fiber is required. An external light source is required for the wavelength calibration. There are cases that the optical alignment and wavelength calibration function cannot correct optical performance. Periodical calibration is also required.

Data Logging function

Records analysis results such as distributed feedback laser diode (DFB-LD) analysis and multi-peak measurements at up to 10,000 points per channel with time stamps. This function is useful for the long-term stability testing and temperature cycle testing of systems and devices.

Advanced Marker function

Adds markers to obtain the power density and the integrated power of a designated spectrum.

Various Analysis Functions

Spectrum analysis functions

12 data analysis functions for popular applications

Built-in analysis functions:
– Spectral width analysis
– OSNR analysis
– DFB-LD analysis
– FP-LD analysis
– LED analysis
– SMSR analysis
– Optical power analysis
– Various filter analysis
– Color analysis

7 individual traces

  • Calculation between traces (subtraction between traces
  • Max/Min hold
  • Simultaneous multi-trace display

Building Automated Test System

Macro programming

Build a simple auto-measurement system

  • No external PC is required.
  • Easy to create test program by recording the user’s actual key strokes and parameter selections.
  • Can control external equipment through the remote interfaces.

Fast remote interfaces

  • GP-IB, RS-232, and Ethernet (10/100Base-T) interfaces. Easy to control with an external PC and to build an automated test system.
  • SCPI compatible, AQ6317 Emulation mode, LabVIEW® driver available

See the AQ6373B brochyre for more information.

Model Suffix Description
AQ6373B Optical Spectrum Analyzer
Spec code -10 Standard model
Built-in light source -L1 Wavelength reference source

Optional Accessories:

Model Suffix Description
735371 AQ6370 Viewer (For all the AQ6370 series models)
810804602 AQ9447 Connector Adapter
Connector type -FCC FC type
Connector type -SCC SC type
813917321 AQ9441 Universal Adapter
Connector type -FCC FC type
Connector type -SCC SC type
735383 -A001 NA Conversion Adapter (for GI50/125 μm)
-A002 NA Conversion Adapter (for GI62.5/125 μm)
751535 -E5 19 inch Rack mount kit

Webinar – Introduction to Optical Spectrum Analyzers 51:36 min


Optical Spectrum Analyzer Applications 2:05 min


AQ6373B User Manual

For more information, see Yokogawa product page.