NKT Photonics Koheras ADJUSTIK, Product Manual

Page: 26 / 105

Laser features
26
Note: Modules that support both modes are configured from the factory to operate in
Power mode.
Trigger
A trigger logic input or output pin (see
Table 18
) is available on the Modulation
connector. The trigger pins can be used for two purposes:
•
To apply (input) a logic signal that initiates laser emission (A logic high
initiates emission.)
•
To output a logic signal that indicates laser emission. (Active high is output.)
For more information on connecting the trigger see
“Connecting the trigger input or
output” on page 85
.
Auto-start
The laser includes an Auto-start control bit, when the bit is set, laser emission is
enabled immediately after power is connected. This mode can be useful for
applications where no communication with the module is possible. See
“Auto start”
on page 82
.
Interlock
To enable emission using auto-start, the interlock signal in the electrical interface
must be high when the module is powered up.
Note: Auto-start will not turn ON the laser emission if after power-up, the interlock
signal subsequently changes to high.
Koheras ADJUSTIK & ACOUSTIK
If the module is used within either the ADJUSTIK or ACOUSTIK chassis, auto-start is
overruled and cannot start laser emissions even if the auto-start bit is set.
KeyUpdater
To enable/disable the Auto-Start feature, use the KeyUpdater tool with either key
below.
•
Enable key – enables the Auto-start feature
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•
Disable key – disables the Auto-start feature
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High temperature
shutdown
To prevent thermal run-away when the laser module temperature exceeds 65 °C, the
emission is automatically turned off. The high temperature shutdown feature uses the
thermal control function inside the laser to turn off the emission.
Note: The laser remains ON and has communications enabled, only the emission is
turned off by the feature.