Newport 6000 - 8. Factory Service Information

Chapter 3 Principles of Operation 27
Unregulated DC
Voltage
Regulator
Pass
Transistor
Modulation Input
Current Set Point
Laser Diode
Output
Shorting
Current
Sense
Figure 16 - Constant Current - Low Bandwidth Mode
3.2.11 Constant Power Mode
In constant P mode the laser circuit is configured as shown in Figure 17. Photodiode
feedback is used to control the laser output and the bandwidth is held low.