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1. 发明授权

US11885707B2 Fiber span characterization utilizing paired optical time domain reflectometers 有权
公开(公告)号：US11885707B2
公开(公告)日：2024-01-30
申请号：US17528317
申请日：2021-11-17
申请人： II-VI Delaware, Inc.
发明人： Michael J. Cahill , Ian Peter McClean
IPC分类号： G01M11/00 , H04B10/071
CPC分类号： G01M11/3145 , G01M11/3127 , G01M11/3181 , H04B10/071
摘要： A system for providing advanced characterization of an optical fiber span is based upon the use of a pair of optical time domain reflectometers (OTDRs), located at opposing end terminations of the span being characterized. Each OTDR performs standard reflectometry measurements and transmits the resulting OTDR trace to monitoring equipment in a typical manner. The pair of OTDR traces is thereafter combined in a particular manner (“stitched together”) to create an OTDR trace of the entire fiber span (essentially doubling the operational range of prior art OTDR measurement capabilities). The transmit portion of one OTDR may be paired with the receive portion of the other OTDR, with time-of-light measurements (or signal loss measurements) used to determine optical path length and/or optical signal loss of the span. Using a multi-wavelength light source in the paired transmit/receive arrangement allows for a characterization of chromatic dispersion of the span.

2. 发明授权

US10635049B2 Ellipsometry device and ellipsometry method 有权
公开(公告)号：US10635049B2
公开(公告)日：2020-04-28
申请号：US16282519
申请日：2019-02-22
申请人： University of Hyogo
发明人： Kunihiro Sato
IPC分类号： G03H1/00 , G01J4/04 , G03H1/04 , G03H1/08 , G01M11/00 , G01J4/00 , G01M11/02
CPC分类号： G03H1/0005 , G01J4/00 , G01J4/04 , G01M11/0228 , G01M11/3181 , G03H1/04 , G03H1/0402 , G03H1/0443 , G03H1/0465 , G03H1/0866 , G03H2001/0033 , G03H2001/0445 , G03H2001/0447 , G03H2001/0456 , G03H2222/31
摘要： The present invention provides an ellipsometry device and an ellipsometry method whereby measurement efficiency can be enhanced. In this method, an object is illuminated by spherical-wave-like illumination light Q linearly polarized at 45° (S1), and an object light O, being a reflected light, is acquired in a hologram IOR using a spherical-wave-like reference light R having a condensing point near the condensing point of the illumination light Q, and a hologram ILR of the reference light R is furthermore acquired using a spherical-wave reference light L having the same condensing point as that of the illumination light Q (S2). The holograms are separated into p- and s-polarized light holograms IKOR, IKLR, κ=p, s and processed to extract object light waves, and object light spatial frequency spectra GK(u, v), κ=p, s are generated (S3) (S4). Ellipsometric angles ψ(θ), Δ(θ) are obtained for each incident angle θ from the amplitude reflection coefficient ratio ρ=Gp/Gs=tan ψ·exp(iΔ). Through use of numerous lights having different incident angles θ included in the illumination light Q, data of numerous reflection lights can be acquired collectively in a hologram and can be processed.

3. 发明申请

US20180316422A1 LOCATION MEASUREMENT APPARATUS, LIGHT MODULATION CONVERTER, AND LIGHT VARIATION LOCATION MEASUREMENT METHOD 审中-公开
公开(公告)号：US20180316422A1
公开(公告)日：2018-11-01
申请号：US15959582
申请日：2018-04-23
申请人： FUJITSU LIMITED
发明人： Tomoyuki Kato , Shigeki Watanabe , Takeshi Hoshida , Takahito Tanimura
IPC分类号： H04B10/079 , H04B10/071 , G01M11/00
CPC分类号： H04B10/0791 , G01M11/3136 , G01M11/3181 , H04B10/071
摘要： An apparatus includes a light source that causes continuous oscillation light to enter one terminal of an optical transmission line, wherein the continuous oscillation light is to propagate a light variation of a first physical amount generated on the optical transmission line to another terminal of the optical transmission line; a photodetector that detects, on the one terminal, light turned back from a light modulation converter provided on the another terminal, wherein the light modulation converter obtains the turned-back light by converting the light variation of the first physical amount into a light variation of a second physical amount; and a processor that calculates a light-variation location generated on the optical transmission line by comparing time variations in the light variation of the first physical amount and the light variation of the second physical amount in the light detected by the photodetector.

4. 发明申请

US20180266918A1 OPTICAL CONNECTOR POLARITY AND LOSS MEASUREMENT USING AN INTEGRATING SPHERE-EQUIPPED OPTICAL MEASUREMENT DEVICE 审中-公开
公开(公告)号：US20180266918A1
公开(公告)日：2018-09-20
申请号：US15865003
申请日：2018-01-08
申请人： Fluke Corporation
发明人： J. David Schell , Seymour Goldstein , Piotr Anatolij Levin
IPC分类号： G01M11/00
CPC分类号： G01M11/337 , G01M11/3181 , G01M11/35 , G02B6/42 , H04B10/07955
摘要： An integrating sphere-equipped optical measurement device and optical connector polarity and type identification and loss measurement are provided. The optical measurement device includes at least two photodetectors that are optically responsive over different ranges of wavelengths. The optical measurement device receives one or more optical signals emanate from optical fibers of an optical fiber cable. The optical measurement device determines an optical intensity or loss of the one or more optical signals based on a measurement made by a corresponding photodetector whose responsivity range includes a wavelength of the one or more optical signals. The optical measurement device determines one or more respective positions where the one or more optical signals impinged on a sensor. The optical measurement device determines a polarity of the optical fiber cable based on both the one or more positions and one or more or transmitting positions of the one or more optical signals, respectively.

5. 发明申请

US20180017464A1 OPTICAL LINE TESTING DEVICE USING WAVELENGTH TUNABLE LASER 审中-公开
公开(公告)号：US20180017464A1
公开(公告)日：2018-01-18
申请号：US15539267
申请日：2015-12-22
申请人： SOLiD, INC.
发明人： Keewoon NA
IPC分类号： G01M11/00 , H04B10/50 , H04B10/079 , H04B10/572
CPC分类号： G01M11/3127 , G01M11/3145 , G01M11/3181 , G01M11/331 , H04B10/071 , H04B10/0795 , H04B10/0799 , H04B10/503 , H04B10/572
摘要： An optical line testing device for measuring at least a cutting position of an optical line according to the present invention includes: a first wavelength tunable laser source configured to generate a first optical signal in which a plurality of wavelengths appear alternately and periodically; a second wavelength tunable laser source configured to generate a second optical signal which is identical to the first optical signal but has an adjustable delay time; and an interferometer configured to cause interference between a reflected optical signal, corresponding to the first optical signal, which is returning after having been emitted to the optical line, and the second optical signal to output an interference signal.

6. 发明申请

US20170370704A1 DISSIMILAR CORES IN MULTICORE OPTICAL FIBER FOR STRAIN AND TEMPERATURE SEPARATION 审中-公开
公开(公告)号：US20170370704A1
公开(公告)日：2017-12-28
申请号：US15520950
申请日：2015-12-07
申请人： INTUITIVE SURGICAL OPERATIONS, INC.
发明人： Mark FROGGATT , Dawn K. GIFFORD , Stephen T. KREGER , Alexander K. SANG , Jeffrey T. LACROIX , Eric E. SANBORN
IPC分类号： G01B11/16 , G01M11/00 , G01B21/04 , G01D5/353 , G01D5/34 , G02B6/02 , G01K11/32
CPC分类号： G01B11/161 , G01B11/18 , G01B21/042 , G01D5/344 , G01D5/35316 , G01D5/35354 , G01K11/3206 , G01L1/242 , G01M11/3172 , G01M11/3181 , G02B6/02042 , G02B6/02057
摘要： An optical fiber includes multiple optical waveguides configured in the fiber. An interferometric measurement system mitigates or compensates for the errors imposed by differences in a shape sensing optical fiber's response to temperature and strain. A 3-D shape and/or position are calculated from a set of distributed strain measurements acquired for a multi-core optical shape sensing fiber that compensates for these non-linear errors using one or more additional cores in the multicore fiber that react differently to temperature changes than the existing cores.

7. 发明申请

US20170299463A1 BRILLOUIN AND RAYLEIGH DISTRIBUTED SENSOR 审中-公开
公开(公告)号：US20170299463A1
公开(公告)日：2017-10-19
申请号：US15130287
申请日：2016-04-15
申请人： VIAVI SOLUTIONS INC.
发明人： Vincent LECOEUCHE
IPC分类号： G01M11/00
CPC分类号： G01M11/3181 , G01D5/35358 , G01D5/35361 , G01D5/35364 , G01K2011/322 , G01M11/3127 , G01M11/3172
摘要： According to examples, a Brillouin and Rayleigh distributed sensor may include a first laser source to emit a first laser beam, and a second laser source to emit a second laser beam. A photodiode may acquire a beat frequency between the two laser beams. The beat frequency may be used to maintain a predetermined offset frequency shift between the two laser beams. A modulator may modulate the first laser beam. The modulated first laser beam is to be injected into a device under test (DUT). A coherent receiver may acquire a backscattered signal from the DUT. The backscattered signal results from the modulated first laser beam injected into the DUT. The coherent receiver may use the second laser beam as a local oscillator to determine Brillouin and Rayleigh traces with respect to the DUT based on the predetermined offset frequency shift.

8. 发明申请

US20160231197A1 KERR PHASE-INTERROGATOR FOR SENSING AND SIGNAL PROCESSING APPLICATIONS 有权
标题翻译：用于感应和信号处理应用的KERR相位互调器
公开(公告)号：US20160231197A1
公开(公告)日：2016-08-11
申请号：US14614510
申请日：2015-02-05
申请人： UNIVERSITY OF OTTAWA
发明人： Chams BAKER , Xiaoyi BAO
IPC分类号： G01M11/00
CPC分类号： G01M11/3172 , G01L1/242 , G01M11/3181
摘要： A Kerr medium is introduced into OFDR configuration to enable phase to power variation conversion thereby enabling an all-optical beat signal acquisition, thus eliminating performance limits associated with bandwidth capabilities of electronic and optoelectronic components.
摘要翻译：将克尔介质引入到OFDR配置中以实现相位功率变化转换，从而实现全光学差拍信号采集，从而消除与电子和光电子部件的带宽能力相关联的性能限制。

9. 发明申请

US20150338308A1 PRISM-COUPLING SYSTEMS AND METHODS FOR CHARACTERIZING LARGE DEPTH-OF-LAYER WAVEGUIDES 有权
标题翻译：用于表征大量深层波长的PRISM耦合系统和方法
公开(公告)号：US20150338308A1
公开(公告)日：2015-11-26
申请号：US14707431
申请日：2015-05-08
申请人： Corning Incorporated
发明人： Shenping Li , Rostislav Vatchev Roussev
IPC分类号： G01M11/00 , G01B11/22 , G01L1/24
CPC分类号： G01M11/3181 , G01B11/22 , G01J4/04 , G01J2004/005 , G01L1/24 , G01N21/23 , G01N21/41 , G01N21/8422 , G01N2021/4126 , G02B5/04
摘要： Prism-coupling systems and methods for characterizing large depth-of-layer waveguides are disclosed. The systems and methods utilize a coupling prism having a coupling angle α having a maximum coupling angle αmax at which total internal reflection occurs. The prism angle α is in the range 0.81αmax≦α≦0.99αmax. This configuration causes the more spaced-apart lower-order mode lines to move closer together and the more tightly spaced higher-order mode lines to separate. The adjusted mode-line spacing allows for proper sampling at the detector of the otherwise tightly spaced mode lines. The mode-line spacings of the detected mode spectra are then corrected via post-processing. The corrected mode spectra are then processed to obtain at least one characteristic of the waveguide.
摘要翻译：公开了用于表征大深度深度波导的棱镜耦合系统和方法。这些系统和方法利用具有耦合角度α的耦合棱镜，其具有发生全内反射的最大耦合角度αmax。棱镜角α在0.81αmax＆nlE;α＆nlE;0.99αmax的范围内。这种配置使更多间隔开的低阶模式线移动得更近，并且更紧密间隔的高阶模式线分离。经调整的模式线间距允许在否则紧密间隔的模式线的检测器处进行适当的采样。然后通过后处理校正检测模式谱的模式线间隔。然后处理校正的模式光谱以获得波导的至少一个特性。

10. 发明申请

US20150263804A1 OPTICAL FREQUENCY DOMAIN REFLECTOMETRY (OFDR) SYSTEM 有权
标题翻译：光频域反射测量（OFDR）系统
公开(公告)号：US20150263804A1
公开(公告)日：2015-09-17
申请号：US14432877
申请日：2013-09-16
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Jeroen Jan Lambertus Horikx , Gert Wo 'T Hooft , Milan Jan Henri Marell
IPC分类号： H04B10/071 , H04B10/25
CPC分类号： H04B10/071 , G01M11/3172 , G01M11/3181 , H04B10/25
摘要： There is presented an optical frequency domain reflectometry (OFDR) system (100) comprising a first coupling point (15) arranged for splitting radiation into two parts, so that radiation may be emitted into a reference path (16) and a measurement path (17). The system further comprises an optical detection unit (30) capable of obtaining a signal from the combined optical radiation from the reference path and the measurement path via a second coupling point (25). The measurement path (17) comprises a polarization dependent optical path length shifter (PDOPS, PDFS, 10), which may create a first polarization (PI) and a second polarization (P2) for the radiation in the measurement path, where the optical path length is different for the first and second polarizations in the measurement path. This may be advantageous for obtaining an improved optical frequency domain reflectometry (OFDR) system where e.g. the two measurements for input polarizations may be performed in the same scan of a radiation source.
摘要翻译：提出了一种光频域反射测量（OFDR）系统（100），其包括被布置成将辐射分成两部分的第一耦合点（15），使得辐射可以被发射到参考路径（16）和测量路径（17 ）。该系统还包括能够通过第二耦合点（25）获得来自参考路径和测量路径的组合光辐射的信号的光学检测单元（30）。测量路径（17）包括偏振相关光路长度移位器（PDOPS，PDFS，10），其可以为测量路径中的辐射产生第一偏振（PI）和第二偏振（P2），其中光路长度对于测量路径中的第一和第二极化是不同的。这可能有利于获得改进的光频域反射计（OFDR）系统，其中例如。用于输入偏振的两个测量可以在辐射源的相同扫描中执行。

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