User`s guide

Performance Tests Power Tests
120 Agilent 81600B Tunable Laser Source Family, Fourth Edition
4
Determine the minimum value of the filter transmission, that is the
actual Fiber bragg Grating center wavelength
λ
0
.
a Check for the minimum transmitted peak power in the table.
b Mark the associated wavelength set on the Tunable Laser, TLS_λ
0
,
and note the value in the Test Record.
c Mark the associated displayed on the Optical Spectrum Analyser,
OSA_λ
0
, and note the value in the Test Record.
5 Set the TLS to the wavelength of the minimum transmission, TLS_λ
0
6 Record the spectrum at minimum filter transmission.
Set the OSA:
• Set the sensitivity to -90 dBm
• Set the resolution bandwidth to 0.5 nm
• Set the center wavelength to OSA_
λ
0
• Set the span to 6 nm
• Set the reference level to -40 dBm
7 Determine the limits of the transmission and attenuation ranges:
a Lower Transmission Band: λ
1
... λ
2
•TLS_λ
1
= TLS_λ
0
- 3 nm
•TLS_
λ
2
= TLS_λ
0
- 0.5 x Attenuation Band
= TLS_λ
0
- 1 nm
0.0 nm _______ dBm _______ nm
+0.1 nm _______ dBm _______ nm
+0.2 nm _______ dBm _______ nm
+0.3 nm _______ dBm _______ nm
+0.4 nm _______ dBm _______ nm
+0.5 nm _______ dBm _______ nm
+0.6 nm _______ dBm _______ nm
+0.7 nm _______ dBm _______ nm
+0.8 nm _______ dBm _______ nm
+0.9 nm _______ dBm _______ nm
+1.0 nm _______ dBm _______ nm
Table 8 Filter Transmission Characteristic
TLS module Output
Wavelength relative to λ
FBG
Peak Power Level
Assosciated
Wavelength displayed
by OSA