ADCMT Optical Wavelength Meter 8471

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

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.

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.