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1. WO2007034681 - SPECTROSCOPIC METHOD AND DEVICE

Publication Number WO/2007/034681
Publication Date 29.03.2007
International Application No. PCT/JP2006/317683
International Filing Date 06.09.2006
IPC
G01N 21/27 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
27using photo-electric detection
G01N 21/39 2006.01
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
17Systems in which incident light is modified in accordance with the properties of the material investigated
25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
31Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
39using tunable lasers
CPC
G01J 2001/4242
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
1Photometry, e.g. photographic exposure meter
42using electric radiation detectors
4242Modulated light, e.g. for synchronizing source and detector circuit
G01J 3/02
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
02Details
G01J 3/0218
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
02Details
0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
0218using optical fibers
G01J 3/0224
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
02Details
0205Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
0224using polarising or depolarising elements
G01J 3/10
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
02Details
10Arrangements of light sources specially adapted for spectrometry or colorimetry
G01J 3/42
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
28Investigating the spectrum
42Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
Applicants
  • 国立大学法人名古屋大学 National University Corporation Nagoya University [JP]/[JP] (AllExceptUS)
  • NUエコ・エンジニアリング株式会社 NU Eco Engineering Co., Ltd. [JP]/[JP] (AllExceptUS)
  • 伊藤 昌文 ITO, Masafumi [JP]/[JP] (UsOnly)
  • 西澤 典彦 NISHIZAWA, Norihiko [JP]/[JP] (UsOnly)
  • 堀 勝 HORI, Masaru [JP]/[JP] (UsOnly)
  • 後藤 俊夫 GOTO, Toshio [JP]/[JP] (UsOnly)
  • 加納 浩之 KANO, Hiroyuki [JP]/[JP] (UsOnly)
Inventors
  • 伊藤 昌文 ITO, Masafumi
  • 西澤 典彦 NISHIZAWA, Norihiko
  • 堀 勝 HORI, Masaru
  • 後藤 俊夫 GOTO, Toshio
  • 加納 浩之 KANO, Hiroyuki
Agents
  • 藤谷 修 FUJITANI, Osamu
Priority Data
2005-25926107.09.2005JP
2005-28441829.09.2005JP
2005-28458329.09.2005JP
2005-28650630.09.2005JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) SPECTROSCOPIC METHOD AND DEVICE
(FR) PROCÉDÉ ET DISPOSITIF SPECTROSCOPIQUES
(JA) 分光方法及び分光装置
Abstract
(EN)
[PROBLEMS] To achieve a device for measuring the optical absorption coefficient of a sample with high sensitivity. [MEANS OF SOLVING PROBLEMS] A ring-down spectroscopic device uses a variable wavelength femtosecond soliton pulse light source (1). A pulse beam is input to a loop-form optical fiber (6) via a first light transmission path (4) and a light changing-over switch (5). A ring-down pulse beam is input to a homodyne detector (40) via the light changing-over switch (5). A pulse beam propagating on the first light transmission path (4) is branched and input to respective light transmission paths constituting a second light transmission path (20) via a light directivity coupler (8) and a first light switching element (12). A pulse beam propagating on this second light transmission path (20) is input as a reference light to the homodyne detector (40) and is synchronization-detected. The light path lengths of the plurality of light transmission paths constituting the second light transmission path (20) differ sequentially by the length of the optical fiber (6), and respective light transmission paths can have their light path lengths changed minutely.
(FR)
L’invention porte sur un dispositif permettant de mesurer le coefficient d'absorption optique d'un échantillon avec grande sensibilité. L’invention concerne donc un dispositif spectroscopique avec réduction des parasites utilisant une source de lumière à impulsions solitons de femtoseconde à longueur d’onde variable (1). Un faisceau d'implulsions est injecté dans une fibre optique en forme de boucle (6) par le biais d’un premier trajet de transmission de lumière (4) et d'un commutateur de lumière (5). Un faisceau d'implulsions avec réduction des parasites est injecté dans un détecteur homodyne (40) par le biais du commutateur de lumière (5). Un faisceau d'implulsions se propageant sur le premier trajet de transmission de lumière (4) est ramifié et injecté dans les trajets de transmission de lumière respectifs constituant un second trajet de transmission de lumière (20) par le biais d’un coupleur de directivité de lumière (8) et d'un premier élément commutateur de lumière (12). Un faisceau d'implulsions se propageant sur ce second trajet de transmission de lumière (20) est injecté comme lumière de référence dans le détecteur homodyne (40) et est détecté en synchronisation. La longueur des trajets de lumière de la pluralité de trajets de transmission de lumière constituant le second trajet de transmission de lumière (20) diffère de manière séquentielle en fonction de la longueur de la fibre optique (6), et les trajets de transmission de lumière respectifs peuvent voir la longueur de leur trajet lumineux changer de façon minime.
(JA)
【課題】試料の光吸収係数を高感度で測定する装置を実現する。 【解決手段】リングダウン分光装置は、波長可変フェムト秒ソリトンパルス光源1を用いる。パルス光は、第1光伝送路4、光切換スイッチ5を介して、ループ状の光ファイバー6に入力する。リングダウンパルス光は、光切換スイッチ5を介して、ホモダイン検波器40に入力する。一方、第1光伝送路4を伝搬するパルス光は、光方向性結合器8、第1光スイッチ素子12を介して、第2光伝送路20を構成する各光伝送路に分岐入力される。この第2光伝送路20を伝搬するパルス光が参照光として、ホモダイン検波器40に入力して、同期検波される。第2光伝送路20を構成する複数の光伝送路の光路長は、光ファイバー6の長さだけ、順次、異なると共に、それぞれの光伝送路は、光路長を微小変動させることができる。
Also published as
EP06783212
EP6783212
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