7-41
IM AQ6370D-01EN
Analysis
7
Explanation
The following is the structure in which the spatial light of an He-Ne gas laser (1152.274 nm)
is input to an optical fiber.
He-Ne gas laser
Optical fiber plug
Spatial
light
The sweep width is set to 0 nm, the center wavelength is fixed, and measurement of the
single-wavelength light only is taken. Finely adjust the optical fiber plug while observing
the displayed waveform so as to set the light source input level to the peak.
0nm SWEEP TIME
When the sweep width is 0 nm, the horizontal axis is set as the time axis. The time
required to measure from the left edge to the right edge of the screen is set. The allowed
settings are MINIMUM and the range of 1 to 50 s. The value changes in 1 s steps.
If you press the COARSE key, you can change the setting in 1-2-5 steps.
If 0 is entered, MINIMUM is shown on the display. Also, the sweeping time varies
depending on the measurement sensitivity (SENS/MODE soft key under SETUP). If the
setting for this key is less than the sweeping time for each sensitivity, the setting for the
key is invalid and the MINIMUM setting is used. The sampling points are automatically
set to 1001.
7.11 Measurement of Level Fluctuations in Single-Wavelength Light (0 nm Sweeping)
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