Reference Conditions; Relative Uncertainty Due To Polarization - Keysight Technologies 81625B User Manual

3 Specifications

Reference conditions

Relative uncertainty due to polarization

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The power meter is adjusted to zero offset by doing a zero operation with
NOTE
darkened power meter.
The specified conditions during the spectral responsivity calibration, or
conditions which are extrapolated from the conditions during calibration.
Conditions: power level, beam diameter or fiber type, numerical aperture,
wavelength, spectral width, ambient temperature as specified, at the day
of calibration. Noise and drift observed over a specified observation time,
with a temperature change of not more than ±ΔT.
Also termed polarization-dependent responsivity (PDR), the relative
uncertainty due to polarization is the uncertainty of the displayed power
level on the input polarization state, expressed as the difference between
the highest and the lowest displayed power. Uncertainty figures are based
upon a 95% confidence level.
Conditions: laser source with variable polarization state, generation of all
possible polarization states (covering the entire Poincaré sphere), constant
wavelength, constant power level, angled connector as specified,
temperature as specified.
Keysight 81618A/9A and Keysight 81620B/3B/4B/6B/8B Optical Heads User's Guide