Keithley 2520, User Manual, Page: 77 / 329

Model 2520 User’s Manual Laser Diode Testing 4-3
Front panel laser diode testing
Test circuit configuration
The basic circuit configuration for the laser diode test procedures in this section is shown
in
Figure 4-1 . (See Figure 2-5 for a more detailed drawing.) Note that connections for
laser diode as well as both photodiode detectors are included, but the required interlock
connections are not shown. See
Section 2 , “ Connections ,” for detailed signal connection
information as well as interlock connections.
Figure 4-1
Circuit configuration for laser diode testing
Source V
B
Detector 1
A
Laser
Diode
Detector 2
A
V
Model 2520
Source I
L
Source V
B
Measure V
L
Measure I
PD
Optional
Earth Ground
+
–
–
+
Measure I
PD