Power Stability; Relative Intensity Noise (Rin) - Agilent Technologies 81950A User Manual

Specifications Definition of Terms

Power stability

Specifies the change of the power level of the tunable laser source over
time, expressed as ± half the span (in dB) between the highest and lowest
actual power.
Figure 8 Power stability.
Conditions:
Time span as specified. Uninterrupted tunable laser source output power,
constant wavelength and power level settings, constant temperature.

Relative intensity noise (RIN)

Specifies the ratio between the mean-square of the optical power
Δ
fluctuation amplitude P within a specified frequency range f and for
f,B
bandwidth B, and the square of the average optical power P .
avg
RIN, if expressed as "dB/Hz", is calculated by:
Conditions:
As specified.
82
Agilent 81950A Compact TLS module, First Edition