User`s guide

Performance Tests Power Tests
126 Agilent 81600B Tunable Laser Source Family, Fourth Edition
5
Set the output power of the TLS module to:
6 Determine filter transmission characteristic, as described in step 3 on
page 118. You may skip this step if the characteristic has already been
determined. This value relates to measurements performed in vacuum.
7 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.
8 Record the spectrum at minimum filter transmission:
Set the TLS to the wavelength of minimum transmission (TLS_
λ
0
).
Check that the laser output is activated.
9 Set the Optical Spectrum Analyzer:
a Set span to 30 nm.
Press [Span] then enter this value.
b Set the resolution bandwidth (RBW) to 1 nm.
Press [AMPL], press [BW Swp] then enter this value.
c Set the sensitivity to -90 dBm.
Press [AMPL], press [SENS] then enter this value.
d Set the center wavelength to OSA_λ
0
.
Press [Center] then enter this value.
e Set the reference level to -40 dBm.
Press [AMPL], press [Ref LVL] then enter this value.
Output Power setting for Total SSE - Low SSE Output:
Tunable Laser Source module Power (P)
Agilent 81600B #200, Output 1 + 2.000 dBm*
Agilent 81600B #160, Output 1 - 4.000 dBm*
Agilent 81600B #150, Output 1 - 3.000 dBm*
Agilent 81600B #140, Output 1 -13.000 dBm
*
The laser output is limited to its maximum possible value at this wavelength. The
display will probably show Exp