Title:
METHOD FOR MEASURING POLARIZATION DEPENDENCY AND APPARATUS FOR MEASURING POLARIZATION DEPENDENCY
Document Type and Number:
Japanese Patent JP3403645
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To measure all of linear polarization states in a short time by setting a plurality of polarization rotors for converting a plurality of branch lights to a plurality of polarized rotary lights having linear polarization planes of different angles, and the like.
SOLUTION: An array grating 102 branches a spontaneous emission light from a light source 101 to 16 ports (λ1-λ16) by wavelengths, and polarization rotors 103-117 rotate linear polarization planes of 16 ports by every 6° (0, 6, 12,..., 90°). A 16-input, 1-output array grating 118 synthesizes the polarized rotary lights branched to 16 ports into one. The synthesized light is input by a fiber 119 with a spherical end to an element 120 to be measured. An output light from the element 120 to be measured is taken out by a fiber 121 with a spherical end and branched to 16 ports again by a 1-input, 16-output array grating 122. Each port is detected by a corresponding photodetector of a group 124. A polarization dependency by every 6° can be measured instantaneously by comparing measured values of the photodetector group 124.
Inventors:
Toshio Ito
Naoto Yoshimoto
Katsuaki Song
Naoto Yoshimoto
Katsuaki Song
Application Number:
JP21465098A
Publication Date:
May 06, 2003
Filing Date:
July 29, 1998
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G01M11/02; H01L33/00; H01S5/00; H01S5/50; (IPC1-7): G01M11/02
Domestic Patent References:
| JP9297063A | ||||
| JP9214035A | ||||
| JP95212A |
Attorney, Agent or Firm:
Yoshikazu Tani (1 person outside)