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公开(公告)号：US20220334007A1
公开(公告)日：2022-10-20
申请号：US17855022
申请日：2022-06-30
申请人： OFS Fitel, LLC
发明人： David D. Braganza , Jie Li , Xiaoguang Sun
摘要： Disclosed herein is a method for measuring temperature via distributed temperature sensing comprising transmitting light through a fiber optic cable; detecting backscattered light in the fiber optic cable, wherein the backscattered light comprises an anti-Stokes band and a Stokes band; calculating a ratio between an intensity of the anti-Stokes band and an intensity of the Stokes band; and using the calculated ratio to determine a temperature being sensed in the fiber optic cable; wherein the fiber optic cable comprises, from the center to the periphery; a central core having a refractive index that decreases progressively from a center of the central core to an edge of the core, wherein the refractive index follows an alpha profile; wherein a bandwidth-length product of the multimode optical fiber has a value greater than 2000 MHz-km at 1550 nm.
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公开(公告)号：US20200176947A1
公开(公告)日：2020-06-04
申请号：US16699278
申请日：2019-11-29
申请人： OFS FITEL, LLC
发明人： Kyle R. Bedard , Jie Li , Xiaoguang Sun , Man F. Yan
摘要： Disclosed herein is a method comprising injecting light of a first wavelength λ1 into a wavelength division multiplexer; injecting light of a second wavelength λ2 into the wavelength division multiplexer; combining the light of the first wavelength λ1 and the light of the second wavelength λ2 in the wavelength division multiplexer to produce light of a third wavelength λ3; and reflecting the light of the third wavelength λ3 in a dual-Brillouin peak optical fiber that is in communication with the wavelength divisional multiplexer; wherein the dual-Brillouin peak optical fiber has at least two Brillouin peaks, such that an amplitude A1 of at least one of said Brillouin peaks is within 50% to 150% of an amplitude A2 of another Brillouin peak 0.5A2≤A1≤1.5A2; wherein the dual-Brillouin peak optical fiber generates a Brillouin dynamic grating that reflects an improved back-reflected Brillouin signal of the combined light.
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3.发明申请公开(公告)号：US20180252596A1
公开(公告)日：2018-09-06
申请号：US15909379
申请日：2018-03-01
申请人： OFS Fitel, LLC
发明人： David D. Braganza , Jie Li , Xiaoguang Sun
CPC分类号： G01K11/32 , G01K2011/324 , G02B6/0281 , G02B6/4208 , G02B6/4298
摘要： Disclosed herein is a method for measuring temperature via distributed temperature sensing comprising transmitting light through a fiber optic cable; detecting backscattered light in the fiber optic cable, wherein the backscattered light comprises an anti-Stokes band and a Stokes band; calculating a ratio between an intensity of the anti-Stokes band and an intensity of the Stokes band; and using the calculated ratio to determine a temperature being sensed in the fiber optic cable; wherein the fiber optic cable comprises, from the center to the periphery; a central core having a refractive index that decreases progressively from a center of the central core to an edge of the core, wherein the refractive index follows an alpha profile; wherein a bandwidth-length product of the multimode optical fiber has a value greater than 2000 MHz-km at 1550 nm.
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公开(公告)号：US20180088360A1
公开(公告)日：2018-03-29
申请号：US15467668
申请日：2017-03-23
申请人： OFS Fitel, LLC
发明人： Xiaoguang Sun
IPC分类号： G02F1/01
CPC分类号： G02F1/0134 , G02B6/02323 , G02B6/0238 , G02B6/024 , G02B6/4478 , G02F2203/07
摘要： Embodiments are directed to an optical fiber cable assembly. The optical fiber cable assembly is a polarization maintaining optical fiber assembly. The assembly includes an optical core located within a cladding. Also within the cladding is a stress rod. The stress rod can be centered within the cladding, with the optical fiber eccentrically located within the cladding. There can also be a second optical fiber eccentrically located within the cladding. The optical fiber can be centered within the cladding, with the stress rod eccentrically located within the cladding.
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公开(公告)号：US09921354B2
公开(公告)日：2018-03-20
申请号：US15712276
申请日：2017-09-22
申请人： OFS Fitel, LLC
发明人： Xiaoguang Sun
CPC分类号： G02B6/0008 , C03C25/10 , G02B6/0006 , G02B6/262 , G02B6/264 , G02B6/32
摘要： Disclosed herein is an optical fiber assembly comprising a launching fiber having a receiving end and a transmitting end; an illuminating fiber having a receiving end and a transmitting end; where the receiving end of the launching fiber is operative to receive light from a light source and the transmitting end of the launching fiber is operative to transmit light to the receiving end of the illuminating fiber; where the launching fiber contacts the illuminating fiber in a manner so as to be offset from a center of a cross-sectional area of the illuminating fiber; and where the launching fiber has a diameter that is ⅛ to ½ of a diameter of the illuminating fiber; and a lens that is operative to contact the transmitting end of the illuminating fiber.
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6.发明申请公开(公告)号：US20150219819A1
公开(公告)日：2015-08-06
申请号：US14511294
申请日：2014-10-10
申请人： OFS Fitel, LLC
发明人： Xiaoguang Sun
CPC分类号： G02B6/0008 , C03C25/10 , G02B6/0006 , G02B6/262 , G02B6/264 , G02B6/32
摘要： Disclosed herein is an optical fiber assembly comprising a launching fiber having a receiving end and a transmitting end; an illuminating fiber having a receiving end and a transmitting end; where the receiving end of the launching fiber is operative to receive light from a light source and the transmitting end of the launching fiber is operative to transmit light to the receiving end of the illuminating fiber; where the launching fiber contacts the illuminating fiber in a manner so as to be offset from a center of a cross-sectional area of the illuminating fiber; and where the launching fiber has a diameter that is ⅛to ½of a diameter of the illuminating fiber; and a lens that is operative to contact the transmitting end of the illuminating fiber.
摘要翻译： 本文公开了一种光纤组件，其包括具有接收端和发射端的发射光纤; 具有接收端和发送端的照明光纤; 其中发射光纤的接收端可操作以接收来自光源的光，并且发射光纤的发射端可操作以将光传输到照明光纤的接收端; 其中所述发射光纤以照明光纤的横截面区域的中心偏移的方式接触所述照明光纤; 并且其中发射纤维的直径为照明光纤的直径的½至1/2; 以及可操作地接触照明光纤的发射端的透镜。
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公开(公告)号：US20180087976A1
公开(公告)日：2018-03-29
申请号：US15460286
申请日：2017-03-16
申请人： OFS Fitel, LLC
发明人： Xiaoguang Sun
CPC分类号： G01K11/32 , G01K2011/324 , G02B6/264 , G02B6/2938
摘要： Embodiments are directed to a distributed temperature sensing system. The system includes a first fiber optic cable and a second fiber optic cable. A first coupler is coupled to the first fiber optic cable. A second coupler is coupled to the second fiber optic cable. An optical isolator coupled between the first coupler and the second coupler to remove a Stokes signal in order to increase the range of the distributed temperature sensing system.
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公开(公告)号：US20180011236A1
公开(公告)日：2018-01-11
申请号：US15712276
申请日：2017-09-22
申请人： OFS Fitel, LLC
发明人： Xiaoguang Sun
CPC分类号： G02B6/0008 , C03C25/10 , G02B6/0006 , G02B6/262 , G02B6/264 , G02B6/32
摘要： Disclosed herein is an optical fiber assembly comprising a launching fiber having a receiving end and a transmitting end; an illuminating fiber having a receiving end and a transmitting end; where the receiving end of the launching fiber is operative to receive light from a light source and the transmitting end of the launching fiber is operative to transmit light to the receiving end of the illuminating fiber; where the launching fiber contacts the illuminating fiber in a manner so as to be offset from a center of a cross-sectional area of the illuminating fiber; and where the launching fiber has a diameter that is ⅛ to ½ of a diameter of the illuminating fiber; and a lens that is operative to contact the transmitting end of the illuminating fiber.
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公开(公告)号：US11473982B2
公开(公告)日：2022-10-18
申请号：US15909379
申请日：2018-03-01
申请人： OFS FITEL, LLC
发明人： David D Braganza , Jie Li , Xiaoguang Sun
IPC分类号： G01K11/32 , G02B6/028 , G02B6/42 , G01K11/324
摘要： Disclosed herein is a method for measuring temperature via distributed temperature sensing comprising transmitting light through a fiber optic cable; detecting backscattered light in the fiber optic cable, wherein the backscattered light comprises an anti-Stokes band and a Stokes band; calculating a ratio between an intensity of the anti-Stokes band and an intensity of the Stokes band; and using the calculated ratio to determine a temperature being sensed in the fiber optic cable; wherein the fiber optic cable comprises, from the center to the periphery; a central core having a refractive index that decreases progressively from a center of the central core to an edge of the core, wherein the refractive index follows an alpha profile; wherein a bandwidth-length product of the multimode optical fiber has a value greater than 2000 MHz-km at 1550 nm.
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公开(公告)号：US11336073B2
公开(公告)日：2022-05-17
申请号：US16699278
申请日：2019-11-29
申请人： OFS FITEL, LLC
发明人： Kyle R Bedard , Jie Li , Xiaoguang Sun , Man F Yan
摘要： Disclosed herein is a method comprising injecting light of a first wavelength λ1 into a wavelength division multiplexer; injecting light of a second wavelength λ2 into the wavelength division multiplexer; combining the light of the first wavelength λ1 and the light of the second wavelength λ2 in the wavelength division multiplexer to produce light of a third wavelength λ3; and reflecting the light of the third wavelength λ3 in a dual-Brillouin peak optical fiber that is in communication with the wavelength divisional multiplexer; wherein the dual-Brillouin peak optical fiber has at least two Brillouin peaks, such that an amplitude A1 of at least one of said Brillouin peaks is within 50% to 150% of an amplitude A2 of another Brillouin peak 0.5A2≤A1≤1.5A2; wherein the dual-Brillouin peak optical fiber generates a Brillouin dynamic grating that reflects an improved back-reflected Brillouin signal of the combined light.
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