User`s guide

Power Tests Performance Tests
Agilent 81600B Tunable Laser Source Family, Fourth Edition 91
7 Measure the output power using the 81624A/B and note the result for
this wavelength in the Test Record.
8 Increase λ, the output wavelength, of the TLS module to the next value
given in the Test Record.
9 Increase the wavelength of the 81624A/B to the same value.
10 Note the measured power for the wavelength in the Test Record.
11 Repeat step 8 to step 10 for the full wavelength range.
12 If you are using the Agilent 81600B #200, #160, #150, #140 or #130,
connect the fiber to Output 2, the High Power output.
That is, set <Optical Output> to <High Power (2)>.
13 Repeat step 5 to step 11 for the full wavelength range.
Power Linearity
For definition, see “Power linearity” on page 43.
Measurement Principle
Power linearity describes the TLS' ability to generate precise power steps.
For example, if the power setting is changed by
3 dB, the actual power should change by 3 dB. The deviations from this
ideal are tested by setting defined power steps and measuring them using
the power meter.
Figure 25 Power Linearity.