Agilent Technologies 81642A Stud Sensor User Manual


 
Performance Tests Performance Test Instructions
90 Agilent 81480A and 81680A, 40A, 82A, 42A, & 89A Tunable Laser Modules Users Guide,
Sixth Edition
c Record noise spectrum for a single sweep.
d Measure partial noise of the spectrum.
With a sampling step of 1 nm on the OSA, check all 201 power
levels within the recorded spectrum, starting at OSA_l_center –
15 nm and finishing at OSA_l_center + 15 nm.
NOTE Note the “partial noise power level” values in a table in [pW], where
1 pW = 10
12
W.
Example:
e Determine total noise power by adding up all 31 partial noise
power levels:
OSA_noise = Sum of all partial noise power levels
OSA_noise = _________ pW
f Note the OSA_noise value in the test record.
3 Connect the Tunable Laser (DUT) to the Optical Spectrum Analyzer
as shown in Figure 25. Connect one end of the Fiber Bragg Grating
to Output 1,the Low SSE output of the TLS and the other to the
Optical Spectrum Analyzer.
4 Set the TLS menu parameters to the values shown in Table Table 5.
Table 20 Signal to Total SSE Tests - Low SSE Outputs
Wavelength,
Relative to OSA_λ_center Partial Noise Power levels
15 nm pW
14 nm pW
13nm pW
. pW
. pW
2nm pW
1nm pW
±0nm (= OSA_λ_center) pW
+1 nm pW
+2 nm pW
. pW
. pW
+13 nm pW
+14 nm pW
+ 15 nm pW
Sum of all partial noise power levels pW