Stokes parameter measurement device and method
AssigneeFurukawa Electric Co., Ltd.
InventorsTakeshi Takagi, Kazuhiro Ikeda, Tatsuya Hatano, Hiroshi Matsuura
Life of this patent
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Abstract
An object is to accurately measure the Stokes parameters, without the occurrence of polarization fluctuations or PDL during the splitting of the incident light. When the incident light is made incident on a first-stage prism, the light is split into two first splitting light rays. Next, the first split light rays are respectively incident on a pair of prisms of a second stage. Each of the pair of first split light rays is split into two rays by a second-stage prism, to obtain four second split light rays.
Claims14
A Stokes parameter measurement device, comprising:
- an incidence portion, on which the signal light to be measured is incident;
- an optical splitter portion, having at least one prism, which splits signal light which has passed through said incidence portion into at least four rays;
- a phase compensation portion, which endows each of the split signal light rays with different polarizations and phases;
- and,
- a photodetector circuit portion, which performs photoelectric conversion of the optical component of the signal light rays emitted from the phase compensation portion.
A Stokes parameter measurement method, in which signal light for measurement is made incident on an incidence portion;
- the incident signal light is split into four rays by an optical splitting portion comprising at least one prism;
- each split signal light ray is endowed with a different polarization and phase by a phase compensation portion;
- the optical components of the signal light rays emitted from the phase compensation portion are subjected to photoelectric conversion by a photodetector circuit portion;
- and operations are performed by an operation circuit portion on the electric signals obtained by photoelectric conversion, to calculate the optical intensity, 0° polarization component, 45° polarization component, and right circularly polarized component, which are the Stokes parameters.
Dependencies are inferred from the claim text.