Laser Sources How to Use Laser Source Modules
108 Agilent 8163A/B, 8164A/B, and 8166A/B User’s Guide, Fourth Edition
How to Modulate the Optical Output
How to Change Modulation Source
The Modulation Source parameter, [Mod Src], allows you to modulate
the output signal. This parameter can be set to Off, Internal,
Coherence Control, or Backplane.
For details of the Off setting “How to Disable Modulation” on page 108.
For details of the Internal setting “How to Use the Internal
Modulation” on page 108
For details of the Coherence Control setting “How to Increase
Linewidth” on page 109
For details of the Backplane setting “External Digital Modulation using
Input Trigger Connector” on page 137.
How to Disable Modulation
If <Off> is displayed as the Modulation Source parameter, [Mod Src],
the laser source outputs an unmodulated continuous-wave signal.
To disable modulation:
1 Move to the Laser Source channel and press [Details] softkey.
2 Move to the modulation source parameter, [Mod Src], and press
Enter.
3 Move to <Off>, by using the cursor key, and press Enter.
How to Use the Internal Modulation
The internal modulation is a square wave with a 50% duty cycle. You
can set both the amplitude and the frequency of this signal. The
amplitude is set by the power parameter. This is the maximum output
power of the output signal; at the minimum output power, no power is
output.
How to Set the Frequency of a Modulated Signal
To set the frequency of the modulation to 6.500 kHz:
Figure 61 The Modulated Signal
Output
Power
t
To Next Page
Loading...
Need help?
General
