User`s guide

Power Tests Performance Tests
Agilent 81600B Tunable Laser Source Family, Fourth Edition 129
12 Determine the SSE power inside the attenuation band by interpolation:
a Check the power measured at OSA_λ
2
and OSA_λ
3
b Mark the larger of OSA_λ
2
and OSA_λ
3,
and record its value as
power_ OSA_
λ
2,3
_max
c Calculate the power inside the attenuation band using:
power_att = 0.5 x power_ OSA_λ
2,3
_max
= ___________ 10
-12
W = ___________ pW
All power values are in [pW], where 1 pW = 10
-12
W.
Determine the total noise power, power_total_noise.
Add the value of power_trans and the value of power_att:
power_total_noise = power_trans + power_att
= ___________ 10
-12
W = ___________ pW
13 Determine Peak power:
a Set the OSA:
• Set the span to 30 nm.
Press Span and enter this value.
• Set the center wavelength to OSA_
λ
0
.
Press Center and enter this value.
• Set the reference level to 0 dBm.
Press [AMPL], press [Ref LVL] then enter this value.
• Set the Sensitivity to -68 dBm.
Press [AMPL], press [SENS AUTO MAN] then enter this value.
• Set the resolution bandwidth to 1 nm.
Press [BW Swp] then enter this value.
b Set the TLS:
• Set the wavelength to a value outside the attenuation band. That is,
set it to TLS_λ
0
+ 5 nm.
• Set the output power to the value in ??
• Ensure the laser output is activated.
c Record the spectrum for a single sweep.
All power values are in [pW], where 1 pW = 10
-12
W.
d Find the maximum power level for the whole spectrum,
power_SSE_peak, and enter the result in the Test Record in [pW]:
Peak_power = ___________ 10
-12
W = ___________ pW