Vidia-Discrete
Getting Started • 11
IEEE-488 (GPIB) or RS-232 ports. Refer to the “Computer Control”
chapter beginning on page 23 for details.
5. Set the power to minimum:
For safety, turn the
Power Adjust
knob counter-clockwise until it stops to set it to minimum power.
6. Activate the laser:
Push the
Laser Power
button. The button will
flash for approximately 5 seconds before current flows through the
diode and the laser begins to emit light.
Laser radiation emitted from this unit may be harmful. Avoid direct exposure
to the beam.
7. Set the operating power:
Turn the
Power Adjust
knob clockwise
to set the laser’s output power (the units are dBm).
To prevent damage to the laser diode, the factory has limited the maximum
current to the laser diode (the maximum is wavelength dependent). When you
reach maximum power for the current wavelength, the controller will engage
the current limiter and the power display will start to flash.
8. Set the system to track mode:
To manually set the wavelength,
the system needs to be in track mode. A light in the
Track
button
indicates when the system is in track mode. If it is not lit, press the
Track
button to turn it on.
9. Set the Wavelength:
Turn the
Wavelength Adjust
knob to set the
wavelength. This will allow you to tune the laser with a resolution
of 0.01 nm. For 0.001-nm resolution, press the
Hi Res/Step
button
and then turn the knob. (Scanning is discussed on page 20.)
10. Turn the laser off:
To minimize the risk of power surges
damaging the laser diode, push the
Power
button to turn off the
laser when it is not in use (the LED on the button will turn off) and
before shutting down the system. Turn the keyswitch off (position
“
0
”) to shut down the entire system.
To avoid the warm-up period, you may want to leave on the system power.
Note:
Note:
Note:
Note:
64X7 rev E.fm Page 11 Tuesday, April 3, 2001 4:16 PM
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