Tsunami Mode-Locked Ti:sapphire Laser
D-2
3. Copy the Lok-to-Clock software module into the LabView subdirec-
tory where the other modules reside.
4. Start the LabView software, then select and run the Lok-to-Clock soft-
ware module.
5. From the LabView Lok-to-Clock Control Panel, select “Controls” from
the menu and chose the appropriate COM port.
6. Use the mouse and keyboard to select and set the parameters displayed
on the screen. A description of the controls are listed below. For
detailed functional descriptions of the Lok-to-Clock system, refer to
Chapter 8.
Controls Description
STOP button—when pressed, aborts the current LabView process.
LOK CONTROL switch—turns on the Lok-to-Clock lock function when the
switch is set to the up position. “Lock” or “Unlock” is displayed to indicate
its position.
LOK STATUS light—turns on when the LOK CONTROL switch is set to the
lock position and the system is locked. “Locked” or “Unlocked” is dis-
played to the right of the lamp to indicate its status as well.
PHASE DELAY control—allows you to set the phase delay for locking the
system to an input signal. It sets the timing between the reference source
and the Tsunami laser from 0 to about 2 ns. This is a nominal setting, not a
calibrated function. Because the delay timing control on LabView and the
Model 3930 are interactive, for consistent results when using LabView,
“turn off” the coarse and fine timing adjustment controls on the Model
3930 by turning them fully clockwise.
DELAY READ indicator—displays the actual delay between the original
signal and the lock signal. This is a nominal setting, not a calibrated func-
tion. Use it for reference only.
PZT MONITOR indicator—similar to the STATUS indicator on the Model
3930, it shows the relative position of the M
4
PZT mirror within its range.
When the position bar is not present, the Lok-to-Clock function has been
disengaged via the LabView LOK STATUS switch or the Model 3930 STA-
TUS: LOCK
button.
FREQUENCY DIFFERENCE indicator—similar to the FREQUENCY indica-
tor on the Model 3930, it indicates the difference between the reference fre-
quency and actual laser pulse frequency.
Note: the Model 3930 and LabView indicators may disagree slightly
because different measurement devices are used. Also, the Model 3930
need not be set to DIF for the LabView indicator to display properly.
RUNNING indicator—flashes to indicate Lok-to-Clock is under LabView
control.
Trademarks: Lok-to-Clock, LabView, and Windows are registered trademarks of Spectra-
Physics, Inc., National Instruments Corporation and Microsoft Corporation, respectively.
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