3-30
IM AQ6370D-01EN
Ripples in the 1350 to 1450 nm Area
Water (OH-) ions present in the monochromator absorb light in the 1350 to 1450 nm
area, resulting in ripples in the measurement waveform. Either set a coarser resolution or
use the monochromator in a lower-humidity environment to reduce the amount of ripples.
Waveforms with Resolutions of 0.020 nm
When the resolution is set to 0.020 nm for measurements of a light source such as a
DFB laser in which with the spectral width is narrower than the instrument’s resolution,
very small spikes may occur at the skirts of the waveform. This type of spike occurs due
to characteristics of the optical block and is not an indication of any problem. Even if such
spikes occur, satisfactory performance in terms of resolution, dynamic range, and the like
can be ensured. These spikes will disappear if the resolution is set to a coarser value.
Brightness of the installation location
The instrument’s shielding specifications indicate use in common office or factory
environments (with illumination of 300 to 1000 Ix). Therefore, depending on the
illumination in the installation location, the instrument may receive some ambient light
which can affect measurements of light with small level measurement values. In such
cases, turn lights around the instrument OFF to reduce inaccuracies.
3.9 Important Points During Measurement
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