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1. 发明申请

WO2002095329A1 OPTICAL DISTRIBUTED SENSOR WITH BRAGG GRATING SENSING STRUCTURE 审中-公开
标题翻译：具有BRAGG光栅感应结构的光学分布式传感器
公开(公告)号：WO2002095329A1
公开(公告)日：2002-11-28
申请号：PCT/NO2002/000180
申请日：2002-05-22
申请人： OPTOPLAN AS , LØVSETH, Sigurd, Weidemann , KRINGLEBOTN, Jon, Thomas
发明人： LØVSETH, Sigurd, Weidemann , KRINGLEBOTN, Jon, Thomas
IPC分类号： G01B11/16
CPC分类号： G01B11/16 , G01D5/35316 , G01L1/246 , H01S3/0675
摘要： Optical device for distributed sensing of a measurand and/or changes thereof where the spectral transmission and reflection characteristics of the device depend upon the measurand. A passive sensing section have at least one Bragg grating sensing structure in a waveguide. The Bragg grating sensing structure comprises at least two superimposed or partly overlapping Bragg subgratings with at least two different Bragg wavelengths. At least two of the said Bragg subgratings comprise a phase-shift. The Bragg subgratings have their phase shifts spatially separated from each other along the waveguide sensing section. The sensing section can be made active by at least partly doping it with rare earth ions and forming a laser medium, or an active component. Examples of using the passive as well as the active sensing sections in optical distributed sensors are described.
摘要翻译：用于被测量和/或其变化的分布式感测的光学装置，其中装置的光谱透射和反射特性取决于被测量。无源感测部分在波导中具有至少一个布拉格光栅感测结构。布拉格光栅感测结构包括具有至少两个不同布拉格波长的至少两个重叠或部分重叠的布拉格亚光栅。所述布拉格梯级中的至少两个包括相移。布拉格亚光栅沿着波导传感部分将它们的相移在空间上相互分离。感测部分可以通过至少部分地用稀土离子掺杂并形成激光介质或活性组分而被制成活性。描述在光学分布式传感器中使用无源以及主动感测部分的示例。

2. 发明申请

WO2002100794A1 METHOD FOR PREPARING AN OPTICAL FIBRE, OPTICAL FIBRE AND USE OF SUCH 审中-公开
标题翻译：制备光纤，光纤及其应用的方法
公开(公告)号：WO2002100794A1
公开(公告)日：2002-12-19
申请号：PCT/NO2002/000205
申请日：2002-06-11
申请人： OPTOPLAN AS , KRINGLEBOTN, Jon, Thomas , HORDVIK, Audun
发明人： KRINGLEBOTN, Jon, Thomas , HORDVIK, Audun
IPC分类号： C03C25/22
CPC分类号： G02B6/02104 , C03C25/104 , C03C25/1062 , C03C25/223 , C03C25/6208 , G02B6/02 , G02B6/02123 , G02B6/02185 , G02B6/02395
摘要： Method for coating an optical fibre with optical fibre Bragg grating (FBG) with a hermetic coating, particularly a coating of carbon, to avoid ingress of gases, vapours or fluids in the ambient environment. This can be water or hydrogen, which can diffuse into the fibre glass and cause deviation/drift in the measured Bragg measurements. Bragg grating that maintain the grating strength at temperatures in excess of 1000 °C is used, which is heated to above 1000 °C in a chamber with a reactive gas that produces deposition of carbon.
摘要翻译：用光纤布拉格光栅（FBG）涂覆光纤的方法，其具有密封涂层，特别是碳涂层，以避免在周围环境中进入气体，蒸汽或流体。这可以是水或氢，它们可以扩散到玻璃纤维中，并导致测量的布拉格测量中的偏差/漂移。使用在超过1000℃的温度下保持光栅强度的布拉格光栅，其在具有产生碳沉积的反应气体的室中被加热到高于1000℃。

3. 发明公开

EP1257858A1 WAVELENGTH CONTROLLED FBG FILTER 审中-公开
标题翻译：波长控制FBG滤光
公开(公告)号：EP1257858A1
公开(公告)日：2002-11-20
申请号：EP00975017.5
申请日：2000-11-08
申请人： Optoplan AS
发明人： THINGB , DAG , BERG, Arne , KRINGLEBOTN, Jon, Thomas
IPC分类号： G02B6/293
CPC分类号： G02B6/2932 , G02B6/02195 , G02B6/29383 , H04J14/021
摘要： Controlled fiberoptic filtering system comprising at least one tunable FBG filter engraved into a first optical fibre, the FBG filter comprising at least one grating with a chosen wavelength, inscribed in a chosen length of fibre, the grating providing reflections at least two wavelengths, a filter and a sensor wavelength. The system comprises: actuator means coupled to the filter for providing a change in the reflected wavelengths reflected by the grating, e.g. by providing a strain/compression and/or a temperature change to the grating, thus altering the filter wavelength, a light source coupled to the first optic fibre for providing an optic signal at a range of wavelengths comprising the sensor wavelength of the filter, wavelength readout unit coupled to first optic fibre for measuring the wavelength of optical signals reflected from the grating within the sensor wavelength, and control means coupled to the output of said wavelength readout unit and to said actuator means for positioning the reflected wavelengths or controlling the change in the wavelengths reflected from the grating, as provided by the actuator, and thus simultaneously the position or change in the filter wavelength.

4. 发明授权

EP0960321B1 DEVICE FOR MEASUREMENT OF OPTICAL WAVELENGTHS 失效
标题翻译：用于测量光波长
公开(公告)号：EP0960321B1
公开(公告)日：2004-12-29
申请号：EP98904437.5
申请日：1998-01-29
申请人： OPTOPLAN AS
发明人： KRINGLEBOTN, Jon, Thomas , THINGBÖ, Dag , NAKSTAD, Hilde
IPC分类号： G01J3/42
CPC分类号： G01J9/0246
摘要： A device for accurate and repeatable measurements of optical wavelengths, including an interrogation broadband light source (1) and a tuneable optical filter (2). A first part of the light is, in either order, transmitted through the filter (2) and reflected from, or transmitted through, at least one fibre Bragg grating (5) with known Bragg wavelength, providing an absolute wavelength reference, and directed to a first detector (7). A second part of the light is, in either order, transmitted through the filter and transmitted through, or reflected from a Fabry-Perot filter (8) with fixed and known free spectral range, creating a comb spectrum sampling the interrogation source spectrum to provide an accurate frequency/wavelength scale. Said second part of the light is directed to a second detector (10), where the electrical output signals from the detectors (7, 10) are simultaneously sampled, compared and processed in a signal processing unit (11) to provide accurate and repeatable wavelength measurements.

5. 发明公开

EP1040330A1 METHOD FOR APPLICATION OF AN OPTICAL FIBRE AS A HYDROSTATIC PRESSURE SENSOR 有权
标题翻译：使用被光纤作为静水压力传感器
公开(公告)号：EP1040330A1
公开(公告)日：2000-10-04
申请号：EP98960111.7
申请日：1998-12-08
申请人： Optoplan AS
发明人： KRINGLEBOTN, Jon, Thomas
IPC分类号： G01L1/24
CPC分类号： G01L1/246 , G01D5/35303 , G01L11/025
摘要： A method is disclosed, for application of an optical fibre with a core (1) and a cladding (2) as a hydrostatic pressure sensor. A fibre-optic Bragg grating (5) is written into the core (1) of the optical fibre and two side-holes (3) are included in the cladding (2). Said side-hole optical fibre is spliced in-between standard single mode fibres (6), so that a change in differential pressure between the surroundings and the side-holes will cause a change in the fibre birefringence. This gives a change in wavelength separation between the two reflection peaks of the grating corresponding to each of the two orthogonal polarisation eigenmodes of the fibre, with an enhanced pressure sensitivity compared to the pressure included wavelength shift of a standard fibre grating. The side-hole fibre has a total birefrigence in the operating pressure range sufficient to split the two grating reflection, and such that the two peaks do not cross each other under operation.

6. 发明授权

EP1350289B1 OPTICAL WAVEGUIDE LASER COMPRISING BRAGG GRATINGS 有权
标题翻译：具有Bragg网格光纤激光器
公开(公告)号：EP1350289B1
公开(公告)日：2009-04-22
申请号：EP01270933.3
申请日：2001-11-21
申请人： OPTOPLAN AS
发明人： KRINGLEBOTN, Jon, Thomas , LÖVSETH, Sigurd, Weidemann
IPC分类号： H01S3/067 , H01S3/10
CPC分类号： H01S3/0675 , H01S3/1055 , H01S3/1603 , H01S3/2383
摘要： A Bragg Grating optical waveguide laser source comprising at least one Bragg grating in a rare earth doped waveguide and an optical pump source coupled to said doped waveguide, said Bragg gratings having at least two different peak reflection wavelengths and at least one of said Bragg gratings comprising a phase-shift and a phase-shift actuator being coupled to the phase-shift for controlled application of changes in the phase-shift thus activating or deactivating the corresponding Bragg grating waveguide laser.

7. 发明公开

EP1218710A1 DEVICE FOR MEASURING OF OPTICAL WAVELENGTHS 审中-公开
标题翻译：用于测量的光波长
公开(公告)号：EP1218710A1
公开(公告)日：2002-07-03
申请号：EP00957154.8
申请日：2000-09-07
申请人： OPTOPLAN AS
发明人： THINGB , Dag , KRINGLEBOTN, Jon, Thomas
IPC分类号： G01J9/00
CPC分类号： G01J9/00
摘要： Fibre optic apparatus for accurate and repeatable measurements of light comprising one or more wavelength ranges, and system employing the apparatus. The apparatus according to the invention comprises: a directional coupler adapted to lead the light into an optical fibre, said optical fibre containing at least one analysis filter for each wavelength range, said analysis filters consisting of at least one fibre-optical Bragg-grating (FBG) which reflects incident light with a chosen wavelength back through said directional coupler and onto a detector having an associated signal processing unit, a modulator device for pulsing the incident light with a chosen pulse width, and an optical fibre delay line in front of each analysis filter, with a length adapted to provide for a sufficient time delay larger than the pulse width, so that the pulses reflected from each analysis filter at different wavelengths can be separated in time and thereby be demodulated in the signal processing unit.

8. 发明公开

EP1192500A1 METHOD AND APPARATUS FOR INTERROGATION OF BIREFRINGENT FBG SENSORS 有权
标题翻译：方法和装置，从布拉格光栅基于光纤传感器双断远程访问
公开(公告)号：EP1192500A1
公开(公告)日：2002-04-03
申请号：EP00935741.9
申请日：2000-06-15
申请人： OPTOPLAN AS
发明人： KRINGLEBOTN, Jon, Thomas
IPC分类号： G02F1/01 , G01D5/353 , G01J3/42
CPC分类号： G01M11/3181 , G01D5/35316 , G01D5/35387
摘要： A method for measurements of the orthogonally polarised minimum and maximum Bragg wavelengths of one or several birefringent fibre Bragg grate FBG sensors, and alternatively a method for eliminating errors in FBG sensor measurements caused by undesired grating birefringence, using an FBG wavelength interrogation apparatus, where the light from a polarised wavelength swept narrowband source (1) is passed through an electrically controllable polarisation controller (2), operated in either a scanning mode or a tracking mode to find the two orthogonally polarised reflection spectra of the birefringent FBGs (6) with corresponding minimum and maximum Bragg wavelength, ηBx and ηBy, where a low-birefringent reference FBG with known wavelength (5) and a low-birefringent fixed Fabry-Perod interferometer (8), generating frequency equidistant peaks are used in combination to provide accurate and repeatable wavelength measurements.

9. 发明授权

EP1040330B1 METHOD OF USING AN OPTICAL FIBRE AS A HYDROSTATIC PRESSURE SENSOR 有权
标题翻译：使用被光纤作为静水压力传感器
公开(公告)号：EP1040330B1
公开(公告)日：2013-04-24
申请号：EP98960111.7
申请日：1998-12-08
申请人： Optoplan AS
发明人： KRINGLEBOTN, Jon, Thomas
IPC分类号： G01L1/24
CPC分类号： G01L1/246 , G01D5/35303 , G01L11/025

10. 发明授权

EP1344022B1 FIBRE OPTIC SENSOR SYSTEMS 有权
标题翻译：光纤传感器装置
公开(公告)号：EP1344022B1
公开(公告)日：2011-05-18
申请号：EP01270749.3
申请日：2001-12-12
申请人： Optoplan AS
发明人： KRINGLEBOTN, Jon, Thomas , RONNEKLEIV, Erlend , HJELME, Dag, Roar
IPC分类号： G01D5/353 , H01S3/067 , G01L1/24
CPC分类号： G01D5/35383 , G01D5/35303 , H01S3/0675
摘要： A fibre optic sensor system comprises at least one measuring sensor 1 providing an optical output dependent upon one or more parameters to be measured, e.g. temperature, and at least one reference sensor 2 providing a reference output for comparison with the measuring sensor output. The reference sensor is provided in a birefringent fibre. The system includes a detecting means 13,14 whereby a reference beat signal f2 is derived by measuring the optical frequency splitting between frequency components in different polarisation planes of the reference sensor output. A further beat signal f3 is generated between the measuring and reference sensor outputs, such beat signals being used to derive a measurement of one or more parameters.

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