ii
2.6.2
Main Supply________________________________________________________ 23
2.7
Warm Up and Environmental Consideration__________________________ 23
3.
Laser Diode Driver Module Operation _____________________________25
3.1
Laser Diode Driver Module ________________________________________ 25
3.1.1
Introduction ________________________________________________________ 25
3.1.2
Installation _________________________________________________________ 25
3.1.3
Laser Diode Protection Requirements ____________________________________ 26
3.2
Laser Safety Features _____________________________________________ 28
3.2.1
Conditions Which Can Automatically Shut Off the Laser Output. ______________ 28
3.2.2
Key switch Interlock _________________________________________________ 28
3.2.3
Turn On Delay ______________________________________________________ 28
3.3
The Laser Connectors _____________________________________________ 28
3.3.1
Modulation_________________________________________________________ 29
3.3.2
Photodiode Bias Control ______________________________________________ 30
3.3.3
Photodiode_________________________________________________________ 30
3.3.4
Interlock___________________________________________________________ 30
3.4
Connecting to Your Laser__________________________________________ 30
3.4.1
Laser Diode Connections and Shielding __________________________________ 31
3.4.2
Photodiode Feedback Connections ______________________________________ 32
3.4.3
Sync Out - Option ___________________________________________________ 33
3.4.4
Grounding Consideration______________________________________________ 33
3.5
Laser Module Operation___________________________________________ 33
3.5.1
Quick Start_________________________________________________________ 33
3.5.2
Laser Main Screen ___________________________________________________ 34
3.5.3
Laser Setup Screen___________________________________________________ 35
3.5.4
Laser Modulation Setup Screen _________________________________________ 37
3.5.5
Link Conditions _____________________________________________________ 38
3.6
Laser Module Theory of Operation__________________________________ 40
3.6.1
Laser Interface ______________________________________________________ 40
3.6.2
Limit DAC _________________________________________________________ 40
3.6.3
Set Point DAC ______________________________________________________ 41
3.6.4
A/D Converter ______________________________________________________ 41
3.6.5
Current Source Voltage _______________________________________________ 41
3.6.6
Output Shorting _____________________________________________________ 41
3.6.7
Modulation/Voltage Control Input Port___________________________________ 41
3.6.8
Photodiode Feedback Amplifier ________________________________________ 41
3.6.9
Constant Current, High Bandwidth Mode _________________________________ 42
3.6.10
Constant Current, Low Bandwidth Mode _________________________________ 42
3.6.11
Constant Power Mode ________________________________________________ 43
3.6.12
Laser Interlock Operation _____________________________________________ 44
4.
Temperature Controller Module Operation _________________________45
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