公开(公告)号：US20170122809A1

公开(公告)日：2017-05-04

申请号：US15215323

申请日：2016-07-20

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Yoshihiro KANDA

IPC: G01J4/00

CPC classification number: G01J4/00 ,  G01J2004/008 ,  G01M11/338

Abstract: A PV vector measuring apparatus includes: a light source 101configured to output probe light; a polarization switch 102 that can freely set a state of polarization of input light; a polarimeter 104; a PV-vector calculating device 105; and a rectangular wave generator 106. The polarization switch alternately switches between two orthogonal states of polarization in accordance with a rectangular wave modulation signal output from the rectangular wave generator. Output light from the polarization switch is input to a measurement object 103. The polarimeter 104 measures time dependency of an SOP vector of output light output from the measurement object. The PV-vector calculating device calculates a characteristic vector, which expresses a rate of polarization change in the measurement object, from the time dependency of the SOP vector.

公开(公告)号：US09677943B2

公开(公告)日：2017-06-13

申请号：US15215323

申请日：2016-07-20

Applicant: Oki Electric Industry Co., Ltd.

Inventor： Yoshihiro Kanda

IPC: G01J4/00

CPC classification number: G01J4/00 ,  G01J2004/008 ,  G01M11/338

Abstract: A PV vector measuring apparatus includes: a light source 101configured to output probe light; a polarization switch 102 that can freely set a state of polarization of input light; a polarimeter 104; a PV-vector calculating device 105; and a rectangular wave generator 106. The polarization switch alternately switches between two orthogonal states of polarization in accordance with a rectangular wave modulation signal output from the rectangular wave generator. Output light from the polarization switch is input to a measurement object 103. The polarimeter 104 measures time dependency of an SOP vector of output light output from the measurement object. The PV-vector calculating device calculates a characteristic vector, which expresses a rate of polarization change in the measurement object, from the time dependency of the SOP vector.