Laser Diode Voltage Measurement Calibration - ILX Lightwave LDX-36000 Series User Manual

6
C H A P T E R

Laser Diode Voltage Measurement Calibration

1
2
3
4
5
6
7
8
9
10 Measure and record the voltage with the 36000 by sending the following command:
11 Calculate the slope and offset of the voltage measurement with the following equations:
12 Send the voltage measurement calibration to the 36000 using the following command:
13 Set the voltage on the voltage source to 50% of the full scale voltage measurement.
14 Measure and record the voltage with the 36000 by sending the following command:
15 Verify that the voltage measurement is within the accuracy specifications of the
128
 LDX-36000 Series
C A L I B R A T I O N A N D T R O U B L E S H O O T I N G
Laser Diode Voltage Measurement Calibration
Set the 36000 Display to Voltage by sending the following command: LAS:DIS:V
Set the voltage calibration to default values by sending the following command:
LAS:CAL:LDV 1,0
Connect an adjustable voltage source to the laser diode voltage sense lines located in the
DB9 on the back panel of the 36000.
Connect a DMM to measure the output of the voltage source.
Set the voltage source to 20% of the maximum voltage measurement of the instrument.
Measure and record the voltage output with the DMM.
Measure and record the voltage with the 36000 by sending the following command:
LAS:LDV?
Set the voltage source to 80% of the maximum voltage measurement of the instrument.
Measure and record the voltage output with the DMM.
LAS:LDV?
slope =(DMM 80% measurement - DMM 20% measurement ) / (36000 80%
measurement - 36000 20% measurement )
offset = DMM 80% measurement - ( slope * 36000 80% measurement )
LAS:CAL:LDV slope,offset
LAS:LDV?
instrument.