EXFO IQS-2600B Tunable Laser Source for IQS Platforms - Manual (Page 26)

Setting Standard Parameters
20 IQS-2600B
Selecting a Wavelength
Selecting a Wavelength
There are several ways to select a wavelength for testing.
Whenever you use controls in the Wavelength panel, the LED on the upper
right-hand corner will light up to indicate which settings you are changing.
Entering a Wavelength Directly
Any desired wavelength within the operational limits of the source can be
entered directly by clicking on the numeric box button in the Wavelength
panel of the Instrument function tab.
If the set power cannot be maintained at the selected wavelength
(especially at extreme wavelengths), the displayed power value will flash,
a message appears in the status bar, and the power is no longer in constant
power mode. The output power stability and level will be the natural laser
emission.
To stop the power display from flashing and have the power regulation
work again, set the wavelength at an interval where the displayed power
can be reached, or decrease the power.