Agilent Technologies 81642A Stud Sensor User Manual


 
Performance Test Instructions Performance Tests
Agilent 81480A and 81680A, 40A, 82A, 42A, & 89A Tunable Laser Modules Users Guide, Sixth Edition 87
c Mark the associated wavelength displayed on the OSA, OSA_l
0
,
and note the value in the test record.
4 Set TLS to the wavelength of minimum transmission, TLS_λ
0
.
5 Record spectrum at minimum filter transmission. Set the Optical
Spectrum Analyzer:
a Set the Sensitivity to -90 dBm.
b Set the resolution bandwidth to 0.5 nm.
c Set the center wavelength to OSA_l
0
.
d Set the reference level to -40 dBm.
e Set the span to 6 nm.
6 Determine limits of transmission and attenuation ranges by
performing the following calculations:
f Lower Transmission Band:
l
1
... l
2
TLS_λ
1
= TLS_λ
0
3nm
TLS_λ
2
= TLS_λ
0
0.5 × Attenuation Band
= TLS_λ
0
1nm
g Upper Transmission Band:
l
3
... l
4
TLS_λ
3
= TLS_λ
0
+ 0.5 × Attenuation Band
= TLS_λ
0
+ 1nm
TLS_λ
4
= TLS_λ
0
+ 0.5 × Upper Transmission Band
= TLS_λ
0
+ 3nm
7 Determine maximum transmitted power value inside transmission
band:
Record spectrum:
Check for the maximum transmitted power (max_SSE_power)
within Lower and Upper Transmission Bands. Do this by using
the marker. Change λ by using the RPG and note the maximum
power value within the Lower and Upper Transmission Bands
(this is one value for these bands together). Note this value in the
test record. Check the associated wavelength on OSA
(OSA@max_SSE_power) and note the value in the test record.
8 Set the marker of the OSA to OSA@max_SSE_power.
Change [λ], the output wavelength of the TLS, so that the peak
wavelength of the spectrum is at the OSA marker
Change [λ], the output wavelength of the TLS, to the wavelength of
highest SSE (TLS@max_SSE_power) using the approximation:
TLS@max_SSE_power = OSA@max_SSE_power + 0.5 nm
9 Determine TLS@max_SSE_power as follows:
Set the Optical Spectrum Analyzer: