10-6
IM AQ6370D-01EN
10.4 Inspection of Wavelength Accuracy
Perform a check of the instrument’s wavelength accuracy.
Use a light source such as a gas laser whose wavelength accuracy is known.
AQ6370
OPTICAL SPECTRUM ANALYZER
Light source
9.5/125 µm SM optical fiber
Procedure
1.
Connect a light source to the instrument as shown in the figure above, then
measure spectrums of the light source.
Confirm that the THRESH 3 dB center wavelength of the measured spectrum matches the
wavelength of the light source (is within the wavelength accuracy standard).
For more information, see section 7.1, “Spectrum Width Measurement” and chapter 11,
“Specifications.”
2.
If the wavelength error is large, use the internal reference light source to calibrate
wavelengths.
For the calibration procedure, see section 3.7, “Wavelength Calibration.”
3.
For performing wavelength calibration, check wavelength accuracy again
according to procedure.
Note
If the wavelength error of the instrument is outside of [+/-] 5 nm, you cannot perform wavelength
calibration with the internal reference light source. In this case, readjustment is necessary.
Please contact your nearest Yokogawa representative.
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