User`s guide

Specifications Definition of Terms
40 Agilent 81689A, 81689B and 81649A Tunable Laser Modules User’s Guide, Third Edition
Wavelength Repeatability
The random uncertainty in reproducing a wavelength after detuning
and re-setting the wavelength. The wavelength repeatability is ± half
the span between the maximum and the minimum value of all actual
values of this wavelengths.
Conditions: uninterrupted TLS output power, constant power level,
temperature within operating temperature range, coherence control
off, short time span.
Measurement with wavelength meter at high power output. Averaging
time given by wavelength meter, ≥1 s.
NOTE The long-term wavelength repeatability can be obtained by taken the
wavelength repeatability and wavelength stability into account.
Wavelength Resolution
The smallest possible displayed wavelength increment/decrement.
Wavelength Stability
The change of wavelength during given time span, expressed as ± half
the span between the maximum and the minimum of all actual
wavelengths.
Conditions: uninterrupted TLS output power, constant wavelength
and power level settings, coherence control off, temperature within ±1
K, time span as specified.
Measurement with wavelength meter. Averaging time given by
wavelength meter, ≥1 s.