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Specifications
Definition of Terms
Polarization extinction ratio
Specifies the ratio of the optical power in the slow axis of a connected
polarization-maintaining fiber to optical power in the fast axis, expressed
in dB
Conditions:
Applicable to tunable laser sources utilizing polarization maintaining fiber
that has its TE mode in the slow axis and aligned with the connector key.
Measurement:
Using a polarization analyzer at the end of a polarization-maintaining
patchcord, by sweeping the wavelength to create circular traces on the
Poincaré sphere. Calculate the polarization extinction ratio from the
diameters of these circles.
Figure 6 Circular traces on the Poincaré sphere used to calculate polarization extinction ra-
tio.
80
Agilent 81950A Compact TLS module, First Edition
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