Test 5. Amplitude Accuracy And Linearity - Agilent Technologies Agilent 86120B User Manual

Equipment
• 1550 nm DFB lasers
• Optical attenuator
• Agilent 11896A Polarization Controller
• Optical power meter
Procedure
1 Turn on the laser and allow it to warm up.
2 Connect the laser's output to the optical attenuator's input.
3 Connect the optical attenuator's output to the polarization controller's optical
4 Connect the polarization controller's optical output to the optical power meter.
5 Configure the optical power meter for 1550 nm.
6 Adjust the optical attenuator so that the power meter measures a power level
7 Enter the attenuator setting and the measured power level in the first row of
8 Enter the measured power on the following line:
9 Change the attenuator in 1 dB steps as shown in

Test 5. Amplitude Accuracy and Linearity

Amplitude linearity is performed using the following devices:
Polarization sensitivity
To ensure measurement accuracy, minimize the movement of any fiber-optic cables dur-
ing this procedure. Moving cables causes polarization changes which affect amplitude
measurements.
input.
of 0 dBm.
Table 6-1 on page 6-11. Be sure to enter these values into the "Attenuator
Settings" and "Power Meter Readings" columns.
Pwr: ____________
attenuator settings and power measurements.
Performance Tests
Test 5. Amplitude Accuracy and Linearity
Table 6-1, and enter the
6-9