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31. 发明授权

US11513282B2 Sensor comprising a waveguide with optical resonator and sensing method 有权
公开(公告)号：US11513282B2
公开(公告)日：2022-11-29
申请号：US16979044
申请日：2019-03-08
申请人： TECHNISCHE UNIVERSITÄT MÜNCHEN
发明人： Rami Shnaiderman , Georg Michael Wissmeyer , Vasilis Ntziachristos
IPC分类号： G02B6/02 , A61B5/00 , G01H9/00 , G01L11/02 , G01N21/45
摘要： A sensor (10) comprises a waveguide (20) having a longitudinal axis and an end face (21), the waveguide (20) comprising a Bragg grating (23). The sensor comprises at least one reflector (24) on the end face (21) of the waveguide (20). An optical resonator (25) is formed by the Bragg grating (23), the at least one reflector (24), and an inner portion of the optical resonator (25) between the Bragg grating (23) and the at least one reflector (24). The inner portion of the optical resonator (25) extends within a portion of the waveguide (20). The sensor (10) comprises a detector (32) configured to detect at least one spectral characteristic of the optical resonator (25) or a change of at least one spectral characteristic of the optical resonator (25).

32. 发明申请

US20220373408A1 Microstructured Optical Fiber Sensor 有权
公开(公告)号：US20220373408A1
公开(公告)日：2022-11-24
申请号：US17767244
申请日：2020-10-08
申请人： The University of Adelaide
发明人： Stephen Christopher Warren-Smith , Heike Ebendorff-Heidepriem , Viet Linh Nguyen , Erik Peter Schartner
IPC分类号： G01K11/3206 , G02B6/02
摘要： A microstructured optical fiber sensor for sensing changes in a physical characteristic up to a predetermined temperature is disclosed. The sensor includes a microstructured optical fiber and a fiber Bragg grating formed in the microstructured optical fiber by generating a periodic modulation in the refractive index along a core region of the suspended core. The fiber Bragg grating is configured to produce a band reflection spectra including a fundamental mode and a plurality of higher order modes whose respective wavelengths vary in accordance with changes in the physical characteristic at the core region of the microstructured optical fiber. The microstructured optical fiber is configured to increase the confinement loss of the plurality of higher order modes of the band reflection spectra relative to the fundamental mode.

33. 发明授权

US11506841B2 Optical fiber system employing topological guidance of light 有权
公开(公告)号：US11506841B2
公开(公告)日：2022-11-22
申请号：US17315314
申请日：2021-05-09
申请人： Trustees of Boston University
发明人： Siddharth Ramachandran , Zelin Ma
IPC分类号： G02B6/26 , G02B6/42 , G02B6/32 , G02B6/34 , G02B6/02 , G02B6/14
摘要： An optical fiber system exploits a principle of topological confinement for guided higher-order modes, in contrast to more conventional total-internal-reflection (TIR) confinement. The optical fiber has a geometry and index profile defining a cutoff wavelength for a predetermined L-mode of optical signal propagation in the optical fiber, where L is azimuthal mode index. An optical source subsystem is coupled to the optical fiber to establish an optical signal propagating in the optical fiber, wherein the optical signal has the predetermined L-mode and a wavelength being either (1) at least 15% above the cutoff wavelength such that the optical beam propagates as a topologically confined mode, or (2) sufficiently above the cutoff wavelength that, based on the L-mode of the optical beam, the optical beam propagates as a topologically confined mode having propagation loss less than 3 dB/meter.

34. 发明申请

US20220357516A1 MULTIFIBER CONNECTOR FOR CONCENTRIC MUTLI-CORE FIBER 有权
公开(公告)号：US20220357516A1
公开(公告)日：2022-11-10
申请号：US17621324
申请日：2020-06-19
申请人： COMMSCOPE TECHNOLOGIES LLC
发明人： Michael Aaron KADAR-KALLEN
IPC分类号： G02B6/293 , G02B6/02
摘要： The invention is related to devices that couple light into and out of concentric multicore fibers (MCFs). One embodiment of the invention is directed to a multiplexing/demultiplexing coupler, formed using at least two diffractive optical elements, so that light from one of the cores of the concentric MCF exits the coupler along a first axis and the light from another of the cores of the MCF exits coupler along another axis displaced form the first axis. In another embodiment, an add/drop filter includes at least one diffractive optical element, and directs light from one core of the concentric MCF to one fiber and light from one or more other cores of the concentric MCF to another fiber. In another embodiment, a mixing coupler transmits light from inner and outer cores of a first concentric MCF respectively to outer and inner cores of a second concentric MCF.

35. 发明申请

US20220357515A1 OPTICAL FIBER FILTER AND OPTICAL FIBER AMPLIFIER 有权
公开(公告)号：US20220357515A1
公开(公告)日：2022-11-10
申请号：US17863100
申请日：2022-07-12
申请人： Huawei Technologies Co., Ltd.
发明人： Juhao LI , Jinglong ZHU , Yongqi HE , Shengling WU , Qiang GUO , Ruishan CHEN , Rui ZHOU
IPC分类号： G02B6/293 , G02B6/02
摘要： An optical fiber filter includes a fiber core, inner cladding, and outer cladding. A refractive index of the fiber core, a refractive index of the inner cladding, and a refractive index of the outer cladding progressively decrease in sequence. The fiber core is configured to transmit at least two mutually different first optical signal modes, the inner cladding is configured to transmit at least two mutually different second optical signal modes, and at least one fiber grating is etched on the fiber core. At least part of optical power of a target first optical signal mode is coupled to only a target second optical signal mode at the fiber grating. The target first optical signal mode is one of the at least two first optical signal modes, and the target second optical signal mode is one of the at least two second optical signal modes.

36. 发明授权

US11491651B2 Data communication network with gigabit plastic optical fiber for robotic arm system 有权
公开(公告)号：US11491651B2
公开(公告)日：2022-11-08
申请号：US16807193
申请日：2020-03-03
申请人： The Boeing Company
发明人： Eric Y. Chan
IPC分类号： H04B10/40 , H04J14/02 , B25J9/16 , G02B6/02 , G02B6/42 , H04B10/25
摘要： A robotic arm system comprising an artificial intelligence (AI) processor system, a transceiver electrically coupled to the AI processor system, and a robotic arm having an optical data communication network that communicates with the transceiver. The robotic arm further comprises a transmitter, a plurality of sensors electrically coupled to the transmitter, a receiver, and a plurality of motion actuators electrically coupled to the receiver. The optical data communication network comprises gigabit plastic optical fiber (GbPOF) having a graded-index core made of a transparent carbon-hydrogen bond-free perfluorinated polymer with dopant. In one embodiment, one GbPOF optically couples the transmitter to the transceiver and another GbPOF optically couples the transceiver to the receiver. The flexible high-data-rate GbPOF enables robotic arm control using artificial intelligence.

37. 发明申请

US20220334307A1 HOLE ASSISTED OPTICAL FIBER 有权
公开(公告)号：US20220334307A1
公开(公告)日：2022-10-20
申请号：US17641061
申请日：2019-09-18
申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION
发明人： Saki NOZOE , Nobutomo HANZAWA , Yuto SAGAE , Kazuhide NAKAJIMA , Kyozo TSUJIKAWA
IPC分类号： G02B6/02 , G02B6/032
摘要： An object of the present invention is to provide an HAF having a structure in which the number of air holes is decreased to be smaller than that of a PCF and Rayleigh scattering loss may be more reduced than that in the existing HAF. The HAF according to the present invention includes a core portion having a uniform optical refractive index; a cladding portion having a uniform optical refractive index and surrounding the core portion; and a plurality of air holes arranged in two layers at positions configuring hexagonal closest packing excluding the core portion within the cladding portion along a longitudinal direction of the hole-assisted fiber, wherein a center-to-center spacing of the air holes is a sum of a radius Rin of an inscribed circle inscribed in the air holes in an inner layer and a radius d/2 of the air hole, and a radius “a” of the core portion and a relative refractive index difference Δ between the core portion and the cladding portion are present within a range where Rn, which is a ratio of a Rayleigh scattering coefficient Rsmf of a single mode optical fiber and an effective Rayleigh scattering coefficient Reff of the hole-assisted fiber, is equal to or less than 0.92.

38. 发明授权

US11472735B2 Optical fiber 有权
公开(公告)号：US11472735B2
公开(公告)日：2022-10-18
申请号：US17257980
申请日：2020-04-30
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Chiaki Tokuda , Katsushi Hamakubo , Noriaki Iwaguchi
IPC分类号： C03C25/47 , C03C25/105 , C03C25/1065 , G02B6/02
摘要： An optical fiber comprises a glass fiber comprising a core and a cladding, and a coating resin layer covering the outer periphery of the glass fiber, wherein the coating resin layer has a primary resin layer being in contact with the glass fiber and covering the glass fiber and a secondary resin layer covering the outer periphery of the primary resin layer, the secondary resin layer comprises hydrophobic spherical silica particles, and the content of the silica particles is 7% by mass or more and 60% by mass or less based on the total amount of the secondary resin layer, and the absolute value of the surface potential of the optical fiber is 10 mV or more and 60 mV or less.

39. 发明申请

US20220326431A1 OPTICAL WAVEGUIDE 有权
公开(公告)号：US20220326431A1
公开(公告)日：2022-10-13
申请号：US17616720
申请日：2020-06-04
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Schiller-Universität Jena
发明人： César JÁUREGUI MISAS , Jens LIMPERT , Andreas TÜNNERMANN
IPC分类号： G02B6/02
摘要： The invention relates to an optical waveguide with two or more light-guiding cores (1a-1e) extending continuously along the longitudinal extension of the optical waveguide, parallel to one another and spaced apart from one another, from one end of the optical waveguide to the other, and with a first cladding (2) enclosing the cores (1a-1e). It is an object of the invention to provide a multicore optical waveguide for high-power operation with reduced system complexity compared to the prior art. This object is achieved by the invention in that the cores (1a-1e) are arranged relative to one another and are spaced apart from one another in such a way that the propagation modes of the light propagating in the optical waveguide at a working wavelength couple to one another, the length of the optical waveguide being selected such that the light coupled into only a single one of the cores (1a-1e) at one end of the optical waveguide first spreads to the other cores (1a-1e) during propagation through the optical waveguide and, after passing through the optical waveguide, leaves the optical waveguide again at the other end from a single core (1a) with at least 60%, preferably at least 75%, of the total light power propagating in the optical waveguide. The invention also relates to a laser system with such an optical waveguide as an optical amplifier, and a method for guiding light in an optical waveguide.

40. 发明申请

US20220317349A1 Mode Equalization Filter 有权
公开(公告)号：US20220317349A1
公开(公告)日：2022-10-06
申请号：US17630756
申请日：2019-08-14
申请人： Nippon Telegraph and Telephone Corporation
发明人： Hirotaka Ono , Takayuki Mizuno , Koki Shibahara , Yutaka Miyamoto
IPC分类号： G02B5/20 , G02B6/26 , F21V8/00 , G02B6/02 , G02B6/028 , H04B10/2581
摘要： A mode equalization filter for reducing a difference in optical power between modes of signal light propagating inside FMFs of an MDM optical transmission scheme includes an FMF on the input side, a collimating lens, an ND filter, a condensing lens, and an FMF on the output side. The ND filter includes partial ND filters combined each other and having main surfaces placed in parallel to each other, a ring portion having a low transmittance is provided in a part of the partial ND filter, and a ring portion having a low transmittance is also provided in a part of the partial ND filter. When the ring portions have different aspects, and the partial ND filters are adjusted and set to be slidable in directions of axes, respectively, the partial ND filters have a property that the transmittance of each mode of the signal light differs and can obtain a function of a variable mode equalization filter.

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