This standard specifies methods for measuring polarization crosstalk that occurs when the independence of two polarizations is incomplete in polarization-maintaining optical fibers.
JIS C 6840:2006 Referenced Document
JIS C 60068-1 Environmental testing -- Part 1: General and guidance*, 2016-04-20 Update
JIS C 6840:2006 history
2021JIS C 6840:2021 Optical fibers -- Measurement methods and test procedures -- Polarization crosstalk
2006JIS C 6840:2006 Polarization crosstalk measurement of optical fiber