Title:
MEASURING APPARATUS AND METHOD FOR MEASURING TERAHERTZ PULSES
Document Type and Number:
WIPO Patent Application WO/2016/084322
Kind Code:
A1
Abstract:
The present invention relates to a measuring apparatus (100) configured to measure terahertz pulses (6) transmitted through an object (8) or reflected by the object (8). The apparatus (100) includes a waveguide (48), a propagation unit (45), and a detection unit (9, 20). The waveguide (48) includes an electrooptical crystal (43) that generates terahertz pulses (6) from pulsed light (46) propagated in the electrooptical crystal (43). The propagation unit (45) is configured to propagate the terahertz pulses (6) generated from the electrooptical crystal (43). The detection unit (9, 20) is configured to detect an average output of the terahertz pulses (6) that are propagated through the propagation unit (45), are then applied to the object (8), and are transmitted through the object (8) or reflected by the object (8). The electrooptical crystal (43) has a lower refractive index at a center wavelength of the pulsed light (46) than a refractive index at a center wavelength of the terahertz pulses (6) generated from the electrooptical crystal (43).
Inventors:
OUCHI TOSHIHIKO (JP)
YUKAWA MITSUYOSHI (JP)
YUKAWA MITSUYOSHI (JP)
Application Number:
PCT/JP2015/005643
Publication Date:
June 02, 2016
Filing Date:
November 12, 2015
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
G01N21/3581; G01N21/88; G01N21/94; G01N21/95; G02F1/365; G02F1/37; G02F1/377
Domestic Patent References:
| WO2008122597A1 | 2008-10-16 | |||
| WO2013148368A1 | 2013-10-03 |
Foreign References:
| US20140191131A1 | 2014-07-10 | |||
| EP2657758A2 | 2013-10-30 | |||
| US20130240740A1 | 2013-09-19 | |||
| EP2505986A1 | 2012-10-03 | |||
| JP2010204488A | 2010-09-16 | |||
| US20100140481A1 | 2010-06-10 |
Other References:
THEUER M ET AL: "Efficient generation of Cherenkov-type terahertz radiation from a lithium niobate crystal with a silicon prism output coupler", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747, vol. 88, no. 7, 17 February 2006 (2006-02-17), pages 71122 - 071122, XP012082835, ISSN: 0003-6951, DOI: 10.1063/1.2177540
HIDEKI HIRORI ET AL: "Nonlinear Optical Phenomena Induced by Intense Single-Cycle Terahertz Pulses", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 19, no. 1, 1 February 2013 (2013-02-01), pages 8401110, XP011492641, ISSN: 1077-260X, DOI: 10.1109/JSTQE.2012.2221685
BODROV S B ET AL: "Highly efficient optical-to-terahertz conversion in a sandwich structure with LiNbO3 core", OPTICS EXPRESS, OSA (OPTICAL SOCIETY OF AMERICA), WASHINGTON DC, (US), vol. 17, no. 3, 29 September 2009 (2009-09-29), pages 1871 - 1879, XP002664131, ISSN: 1094-4087
OPT. EXPRESS, vol. 17, 2009, pages 6676 - 6681
HIDEKI HIRORI ET AL: "Nonlinear Optical Phenomena Induced by Intense Single-Cycle Terahertz Pulses", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 19, no. 1, 1 February 2013 (2013-02-01), pages 8401110, XP011492641, ISSN: 1077-260X, DOI: 10.1109/JSTQE.2012.2221685
BODROV S B ET AL: "Highly efficient optical-to-terahertz conversion in a sandwich structure with LiNbO3 core", OPTICS EXPRESS, OSA (OPTICAL SOCIETY OF AMERICA), WASHINGTON DC, (US), vol. 17, no. 3, 29 September 2009 (2009-09-29), pages 1871 - 1879, XP002664131, ISSN: 1094-4087
OPT. EXPRESS, vol. 17, 2009, pages 6676 - 6681
Attorney, Agent or Firm:
ABE, Takuma et al. (30-2Shimomaruko 3-chome, Ohta-k, Tokyo 01, JP)
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