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F-2
Measurement Considerations
Model 2520 User’s Manual
Optimizing laser diode connections
There are several key considerations when making connections to the laser diode:
•
Cable length and inductance
•
Exposed loop area
•
Correct sense lead connections
•
Magnetic coupling between sense and current leads
Each of these considerations is discussed in detail below.
Current pulse output circuit model
shows the Model 2520 current pulse output circuit model. Components include
the current source I and voltage clamp V
C
(compliance circuit). L is the cable inductance,
and the resistance of the laser diode is represented as R
DUT.
Figure F-1
Model 2520 pulse output circuit model
L
L
V
C
I
R
DUT
Model 2520
I
= Current source (5A pulse maximum)
V
C
= Compliance voltage (3-10.5V)
L
= Cable inductance
R
DUT
= Laser diode resistance
Cable
Cable
Summary of Contents for 2520
Page 250: ...A Specifications ...
Page 254: ...B StatusandErrorMessages ...
Page 262: ...C DataFlow ...
Page 266: ...D IEEE 488BusOverview ...
Page 281: ...E IEEE 488andSCPI ConformanceInformation ...
Page 285: ...F MeasurementConsiderations ...
Page 308: ...G GPIB488 1Protocol ...
Page 312: ...H ExamplePrograms ...
Page 317: ...I ContinuousPulseMode ...