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5
Definition of Terms
N O TE
54
This section defines terms that are used both in this chapter
and
"Performance Tests"
Generally, all specifications apply for the given environmental
conditions and after warmup time.
Measurement principles are indicated. Alternative
measurement principles of equal value are also acceptable.
Wavelength tuning range
The range of wavelengths for which the specifications apply,
where the relevant center wavelength is defined as the center
of the tuning range.
Conditions: at specified conditions and coherence control off.
Measurement: with wavelength meter.
Wavelength display resolution
The smallest possible displayed wavelength increment or
decrement.
Wavelength repeatability
The random uncertainty in reproducing the wavelength after
detuning and re-setting the wavelength. The wavelength
repeatability is ± half the span between the maximum and the
minimum value of all measured wavelengths.
Conditions: uninterrupted DFB laser source module output
power, constant power level, coherence control off, controlled
environment as specified.
Measurement: with wavelength meter. Averaging time given by
wavelength meter, 1 s.
The long-term wavelength repeatability can be obtained by taking the
wavelength repeatability and wavelength stability into account.
Wavelength stability
The change of wavelength during given time span, expressed as
± half the span between the maximum and the minimum of all
measured wavelengths.
on page 17.
Agilent DFB Laser Source Module User's Guide
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