Optical Wavelength Meter 2017-10-04T15:25:33+00:00

Optical Wavelength Meter

The AQ6150 and AQ6151 models simultaneously measures the wavelength and power levels of both CW and Modulated optical signals from Dense Wavelength Division Multiplexing (DWDM) components, transceivers, and transmission systems for metro, long haul, and access network applications with high speed data rates of 10G, 40G, 100G and beyond.

Yokogawa’s Optical Wavelength Meter offers an industry first extended life internal reference laser to maximize the usage time between intrusive maintenance tasks in today’s demanding high speed optical R&D, as well as manufacturing applications.


  • Wavelength range 1270 to 1650 nm
  • Accuracy ±1 pm (AQ6150) / ±0.3pm (AQ6151)
  • Simultaneous measurement of up to 1024 wavelengths
  • High-speed measurement
  • Various view modes
  • Remote control: GPIB, Ethernet

Applicable optical fiber SM (ITU-T G.652)
Wavelength range 1270 to 1650 nm
Wavelength accuracy *1 AQ6150: ±0.7 ppm (±1 pm at 1550 nm)
AQ6151: ±0.2 ppm (±0.3 pm at 1550 nm)
Minimum resolvable separation *4 5 GHz (40 pm at 1550 nm, equal power lines input)
Display resolution 0.0001 nm
Power accuracy *2 ±0.5 dB (1550 nm, -10 dBm)
Linearity *2 ±0.3 dB (1550 nm, -30 dBm or higher)
Polarization dependency *4 ±0.5 dB (1550 nm)
Display resolution 0.01 dB
Maximum number of wavelengths 1024
Minimum input power -40 dBm (1270 to 1600 nm, single line input)
-30 dBm (1600 to 1650 nm, single line input)
Maximum input power +10 dBm (total of all lines)
Safe maximum input power +18 dBm (total of all lines)
Return loss *4 35 dB
Measurement time *3 0.3 s or less (single measurement)

*1 Line spectrum, CW, constant polarization during measurement, vacuum wavelength, input power -30 dBm or more, line separation 10 GHz or more in case of multi-line measurement,
confidence level (k=3)
*2 Line spectrum, CW, excluding polarization effects
*3 Number of detected wavelengths 128 or less
*4 Typical


For more specifications, see the AQ6150 Series broschure.

High wavelength accuracy of ±0.3pm

Front-AQ6150x400The real-time correction feature utilizes a highly stable reference signal from the built-in wavelength reference light source in order to provide long-term stability for each measurement taken.

The high accuracy AQ6151 model offers an accuracy of ±0.3pm to meet the most demanding precision requirements.

The standard accuracy AQ6150 offers a ±1pm accuracy for applications with less demanding requirements at a more affordable price.


Cope with modulated light and optical filter measurement

The optical output of optical transceivers and optical transmission systems is modulated with a transmission frequency like 10G and 40Gbps. The built-in Optical Spectrum Analysis capability utilizing an FFT technique is required to measure the spectrum broadened by the modulated signal.

In addition to the regular CW light mode, the AQ6150 Series has a modulated light mode. The modulated mode analyzes the optical spectrum and returns the center wavelength of the modulated light from the transceiver. This mode can also be used for the center wavelength measurement of optical filters such as a band pass filter, AWG and WSS.

Simultaneous measurement of up to 1024 wavelengths

Measure up to 1024 wavelengths in a single input signal with a minimum separation of 5GHz simultaneously, quickly, and accurately. This means the AQ6150 Series optical wavelength meters can meet testing needs in the development and production of WDM transmission system today, as well as in the future.

The multi-wavelength measurement capability contributes to production efficiency and cost reduction in the production of single wavelength laser devices as well by combining multiple laser modules or optical transceivers using an optical coupler and measuring all the signals at once.

Maintain high performance even with low-power input

Equipped with an Auto Gain Control (AGC) function, the AQ6150 Series adjusts the gain of the electrical amplifier automatically based on the input signal power. This helps maximize wavelength accuracy and measurement speed, even if the input signal power is as low as -40 dBm.

Increase throughput with high speed measurement

AQ6150-flowx500For the adjustment and characterization of tunable laser sources and tunable optical transceivers requiring hundreds of wavelength measurements per device, high-speed measurement and processing capability are crucial for improving the production throughput. Both models can acquire, analyze, and transfer a measurement to a PC within 0.3 seconds. This is 5 times faster than our conventional model, vastly improving production throughput. In the Repeat Measurement mode, the AQ6150 series can collect 5 measurements per second, making it extremely useful when adjusting a device while monitoring the wavelength in real time.

User-friendly interface

Easy to view bright color LCD
  • The AQ6150 series screen design and intuitive is inherited from Yokogawa’s best- selling optical spectrum analyzer.
  • This interface has been proven by a vast population of users on a global scale in areas such as R&D testing and troubleshooting in manufacturing.
Screen Only
USB ports
  • For USB compatible data storage devices. mouse, and keyboard.
  • File function enables users to save data and screenshots to the internal memory or USB storage to use when creating test results.
Direct operation with mouse
  • Using a USB mouse makes it easy and intuitive to change measurement conditions, execute an analysis, and modify the optical spectrum view.
  • In the optical spectrum view, the waveform view area can be zoomed and shifted by a simple click and drag.
Draganddrop 1
Data access through LAN The standard LAN port allows convenient access to files stored in the internal memory as well as the ability to remotely update the firmware from a PC. Screen Shot 2012 11 19 At 10.08.19 AM

Reduce the lifetime ownership cost

AQ6150-ownership-costsx200With the conventional wavelength meter, the high failure rate of the wavelength reference light source and its high replacement costs have been a major contribution to the overall ownership costs over a product life.

One of the key product design goals was to address these issues. This was achieved by a multi-dimensional approach, giving the AQ6150 Series the ability to extend the service life of the light source and by reduce the overall replacement cost of the unit.

AQ6150 Optical Wavelength Meter
AQ6151 Optical Wavelength Meter

Suffix – Optical connector (Factory option)
/FC AQ9441(FC) Universal Adapter
/SC AQ9441(SC) Universal Adapter

Accessories included:

Power cord: 1, rubber feet: 1, CD-ROM (user’s manuals): 1, Getting started guide:1

Optional Accessories:

813917321-FCC AQ9441 Universal adapter FC type
813917321-SCC AQ9441 Universal adapter SC type
751535-E3 Rack mount kit 19-inch

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AQ6150 Series User Manual

For more information, visit the Yokogawa homepage.