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Performance Tests Performance Test Instructions
94 Agilent 81480A and 81680A, 40A, 82A, 42A, & 89A Tunable Laser Modules User’s Guide,
Sixth Edition
12 Determine total noise power, power_total_noise. Add the value of
the 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 the value.
• Set the center wavelength to OSA_λ0. Press Center and enter the
value.
• Set the reference level to 0 dBm. Press [AMPL], press [Ref LVL],
and enter the value.
• Set the Sensitivity to −68 dBm. Press [AMPL], press
[SENS AUTO MAN
], and enter the value.
• Set the resolution bandwidth to 1 nm. Press [BW Swp], and enter
the value.
b Set the TLS:
• Set the wavelength to a value outside attenuation band. That is, set
it to TLS_λ0 + 5 nm.
• Set the output power to the value in Table Table 21.
• Ensure the laser output is activated.
c Record the spectrum for a single sweep.
NOTE Note all the power values 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
14 Calculate total SSE and express in decibels, [dB].
NOTE Make sure that all power values are entered in the same units, for
example Watts, W, or picowatts, pW. This ensures that the equation
will give Total SSE in decibels, dB.
15 Note the result in the test record:
Total SSE = ________________ dB
Total SSE 10
peak power
power total noise OSA noise–
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