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Definition of Terms Specifications
Agilent 81480A and 81680A, 40A, 82A, 42A, & 89A Tunable Laser Modules User’s Guide, Sixth Edition 41
Definition of Terms
This section defines terms that are used both in this chapter and
“Performance Tests” on page 57.
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.
Absolute Wavelength Accuracy
The maximum difference between the actual wavelength and the
displayed wavelength of the TLS. Wavelength is defined as wavelength
in vacuum.
Conditions: constant power level, temperature within operating
temperature range, coherence control off, measured at high power
output.
Validity: within given time span after wavelength zeroing, at a given
maximum temperature difference between calibration and
measurement.
Measurement with wavelength meter. Averaging time given by
wavelength meter, ≥1 s.
NOTE The absolute wavelength accuracy of Output 1, the Low SSE Output, of
the Agilent 81680A/40A Tunable Laser modules is the same as the
absolute wavelength accuracy of Output 2, the High Power Output
(guaranteed by design).
Effective Linewidth
The time-averaged 3-dB width of the optical spectrum, expressed in
Hertz.
Conditions: temperature within operating temperature range,
coherence control on, power set to specified value.