6000 Vortex Series Constant-Power Mode • 27
8. On the controller, press the Display button until the display shows
the reading for the auxiliary input (“Aux x.x”).
9. Adjust the beam position on the photodetector to maximize the
voltage being displayed.
10. Adjust the gain of the detector to achieve a reading of about 4 V,
keeping the current set to the recommended operating current.
Switching to Constant-Power Mode
1. If laser power is on, push the Power button to turn off power to the
laser (power must be off to switch modes).
2. Push the Mode button to change the Vortex into constant-power
mode. The Constant Power indicator will go on and the display will
change to show the output power (the units will be in %).
3. Push the Power button to re-activate laser power.
4. Set the desired power level by adjusting the % level. If the Set
button is not already lit, you will need to press it to enable the
adjustment knob.
In order to operate in constant-power mode, you must operate at
less than 100% to ensure that the laser controller can adjust the
current to provide a constant-power level. The operational power
is dependent on your specific laser and the variation in power over
your tuning range.
Do not block the beam incident on the photodetector when in constant-power
mode: this interrupts the feedback loop and will push the laser output to
maximum power.
Vortex6000.book Page 27 Tuesday, February 19, 2002 3:25 PM
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