8471 | ADC Corporation

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Optical Wavelength Meter
8471

Wavelength range: 630 nm to 1650 nm (182 THz to 476 THz)
Wavelength and frequency displays
High-speed sampling: 10 times/s
High-sensitivity measurement: -35 dBm (1200 nm to 1600 nm)
Maximum and minimum values and deviation displays
Stores up to 10,000 data sets
Average measurement up to 100 times
GPIB and USB interfaces

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The 8471 is an optical wavelength meter that uses a He-Ne laser as reference wavelength and employs the Michelson interferometer method, providing high-accuracy measurement. It can measure emission center frequencies of laser diodes for DWDM with high resolution and accuracy. The 8471 even provides a high sampling rate of 10 times per second, and is suitable for oscillation wavelength adjustment. In addition, its deviation display function allows wavelength variation to be measured with high resolution and accuracy.

Optical Wavelength Meter Capable of High-Accuracy and High-Speed Measurement

Features

High-resolution/high-accuracy measurement

Using the interferometer method, the 8471 achieves a maximum resolution of 0.001 nm (1 pm). Moreover, a high measurement resolution of 0.0001 nm (0.1 pm) is possible by performing average measurement of ten times or more.
In addition, the use of a He-Ne laser as reference wavelength enables a high measurement accuracy of 2 ppm. The He-Ne laser provides oscillation with a highly stable wavelength, assuring high accuracy over a long term without calibration.

Full Width at Half Maximum and Measurement Resolution

Measurement Example of Light Source Stability

High-speed sampling

The 8471 provides a high sampling rate of 10 times per second, so that variation in wavelength due to temperature fluctuation can be detected accurately. Also, it is suitable for adjusting the wavelengths of laser diodes.

Frequency and deviation displays

The 8471 displays not only the wavelength but the frequency of light under measurement, which is very useful for adjusting oscillation wavelengths to the ITU-T grid. Deviation measurement is also made available by pressing the deviation measurement key. Its reference wavelength is selectable from either an input value or a value measured at the moment the key is pressed. It is useful for observing wavelength variation due to temperature fluctuation with high accuracy or adjusting wavelengths.

Data memory function

The 8471 can internally store up to 10,000 data sets. As the measurement interval can be set, measurement data can be stored for a long time without a PC.

Specifications

Measurement wavelength range	630 to 1650 nm (182 to 476 THz)
Accuracy	±2 ppm ±1 pm (LASER measurement mode)
Display resolution	1 nm to 0.0001 nm
Display unit	nm (vacuum、 standard air), THz
Sensitivity	-15 dBm, -20 dBm, -25 dBm, -35dBm
Average measurement	Setting number of times: 2 to 100
Display	Measured wavelengths , maximum and minimum wavelengths
Interface	GPIB, USB
Memory	10,000 data