User`s guide

Performance Tests Power Tests
118 Agilent 81600B Tunable Laser Source Family, Fourth Edition
2
Move to the TLS channel of the 8164A/B mainframe. Set the [Menu]
parameters to:
3 Determine the filter transmission characteristics
a Check the center wavelength λ
FBG
of the Fiber Bragg Grating. This
wavelength is printed on its label, for example 1520.5 nm and relates
to measurements performed in a vacuum.
b Set the OSA:
• Set the span to 8 nm.
Press Span and enter this value.
• Set the center wavelength to
λ
FBG
- 0.5 nm.
Press Center and enter this value.
• Set the reference level to 0 dBm
Press [AMPL], press [Ref LVL] and enter this value.
• Set the sensitivity to -68 dBm.
Press [AMPL], press [SENS AUTO MAN
] and enter this value.
• Set the resolution bandwidth to 0.1 nm.
Press [BW Swp] and enter this value.
Tunable Laser Channel [Menu] Parameters Values
<Wavelength Mode><λ>
<Source State><Off>
<Power Unit><dBm>
<Power Mode><Automatic>
Modulation: <mod src><Off>
There is no need to perform this procedure prior to each use of the
FBG
Use this procedure prior to the first application of the FBG, and then
every 12 months.
NOTE
λ
FBG
and λ
0
for a Fiber Bragg Grating
• λ
FBG
is the nominal center wavelength of the FBG, printed on its label
•
λ
0
is its measured, actual value.
Both are measured in vacuum with reference to the TLS. In practice, both
values are the same, although you may find a difference of some pm.
NOTE