User`s guide

Performance Test Instructions Performance Tests
Agilent 81689A, 81689B and 81649A Tunable Laser Modules User’s Guide, Third Edition 51
NOTE The largest Maximum Deviation is the largest positive value and the
smallest Minimum Deviation is the largest negative value (largest
deviation above and below zero respectively).
11 Determine the Relative Wavelength Accuracy Result:
Subtract the Smallest Minimum Deviation from the Largest
Maximum Deviation. Record this value as the Relative Wavelength
Accuracy Result.
Absolute Wavelength Accuracy
12 From the measurements taken in the Relative Wavelength Accuracy
test, pick the largest absolute value from either the Largest
Maximum Deviation or the Smallest Minimum Deviation taken in
step 11, and note this value as Absolute Wavelength Accuracy.
Wavelength Repeatability
1 Move to the Tunable Laser channel of the Agilent 8164A/B
Lightwave Measurement System and press [Menu].
2 Set the menu parameters to the values shown in Table 5.
3 Set the wavelength and power for each Tunable Laser module to the
values given in Table 8.
4 Press the key beside the laser output to switch on the laser.
5 Wait until the wavelength meter has settled. Then measure the
wavelength with the wavelength meter and note the result in test
record as Initial Setting, the reference wavelength, "REF".
6 Set the wavelength of your Tunable Laser module to any wavelength
in its range (in the test record, this is given in column “from
{wavelength} to REF”).
7 Set the wavelength of your Tunable Laser module back to the
Reference Wavelength and wait until the wavelength meter has
settled.
Table 8 Reference Wavelength and Power Settings for Wavelength Repeatability Tests
Module Wavelength [λ] Power [P]
Agilent 81689A 1525.000 nm − 3.00 dBm
Agilent 81689B 1525.000 nm 0.00 dBm
Agilent 81649A 1570.000 nm − 3.00 dBm