User`s guide

Specifications Definition of Terms
46 Agilent 81600B Tunable Laser Source Family, Fourth Edition
Conditions: Uninterrupted tunable laser source output power, constant power setting,
constant temperature. Other conditions as specified.
Measurement: Using a wavelength meter, averaging time
≥ 1s.
Return loss
Specifies the ratio of the optical power incident to the tunable laser source
output port at the wavelength set on the tunable laser source, to the power
reflected from the tunable laser source output port.
Conditions: Tunable laser source output off.
Side-mode suppression ratio
The ratio of optical power in the main mode to the optical power of the
highest sidemode, expressed in dB:
Conditions: As specified.
Measurement: Using the Agilent Lightwave signal analyzer, by analyzing the heterodyning
between the main signal and the highest sidemode within 0.1 GHz to
6GHz.
Signal to source spontaneous emission
(SSE) ratio
Specifies the ratio between signal power and maximum spontaneous
emission (SSE) power. The SSE power is determined in a specified
bandwidth within a ±3 nm window around the signal wavelength, where
±1 nm around the signal wavelength are excluded, expressed in dB per
specified bandwidth.
The relative wavelength accuracy of the low-SSE output
(if applicable) is the same as the relative wavelength accuracy of the high
power output (guaranteed by design).
NOTE