Fiber Coupled Laser Source
Chapter 5: Operation
Rev E, April 6, 2017
Page 7
5.2. Turning On the Source
SHOCK WARNING
High voltage inside. To avoid electrical shock, before powering unit, make sure that the protective
conductor of the 3-conductor power cord is correctly connected to the protective earth contact of the
socket outlet. Improper grounding can cause electric shock resulting in severe injury or even death.
Do not operate without cover installed.
Perform the following steps for turning on the source.
1.
Turn the POWER key switch clockwise. The unit is ON when the display lights up.
2.
Make sure the Interlock Input is short-circuited, see Page 9.
3.
Press and release the ENABLE switch to turn ON the laser. The LASER ON indicator will light up and
after a delay of approximately 5 seconds, the source will begin to emit light.
4.
The default display mode is laser power (mW), however the thermo-electric cooler is activated when the
unit turns on.
5.3. Adjusting the Laser Output Power
The following describes how to adjust the laser output power.
1.
Use the PWR ADJUST knob to adjust the output power to the desired level.
2.
The power shown on the display is the optical power at the laser aperture. The actual power at the end of
your fiber optic cable may be less, depending on the quality of the connection.
NOTE
: Each unit is calibrated internally to limit the maximum operating power of the laser diode to a safe
operating range. Please refer to the next section for instructions on optimizing the output of the laser.
5.4. Turning the Laser Off
Perform the following steps to turn the laser off.
1.
The Laser output should be turned off by pressing and releasing the ENABLE switch.
2.
When completely powering down an enabled unit, first press and release the ENABLE switch and then
turn the POWER key switch counterclockwise, which will turn OFF the entire unit. Anytime the unit is
turned OFF and then turned back ON, the Laser will be disabled until the ENABLE switch is pressed.
5.5. Adjusting the Temperature of the Laser Diode
The following describes how to adjust the temperature of the laser diode.
1.
Pressing the °C/mW switch once will toggle the display from laser power (mW) to laser temperature (°C).
2.
The display indicates the temperature set point of the thermo-electric cooler system.
3.
Adjustments to the temperature are made with the TEMP ADJUST knob on the front of the unit.
Clockwise increases the set point, counter-clockwise decreases it.
4.
Depending on the magnitude of the change in temperature set point, it will take anywhere from a few
seconds to a few minutes for the system to settle into the new operating temperature.
Please refer to “Maximizing the Output Stability” for helpful advice on improving the performance of your laser
source.
