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公开(公告)号：US20200264059A1
公开(公告)日：2020-08-20
申请号：US16844795
申请日：2020-04-09
申请人： OFS FITEL, LLC
发明人： Robert S Dyer , Jie Li , John E Pacini , Brian Violette
摘要： Disclosed herein is an optical cable comprising a support; flexible protective tubes helically wound around the support, each flexible protective tube comprising an optical fiber comprising an optical core; a cladding disposed on the core; and a primary coating external to the cladding; and a deformable material surrounding the optical fiber; an outer jacket surrounding the flexible protective tubes; wherein each optical fiber is about 0.5% to about 1.5% longer than its respective flexible protective tube; wherein an allowable strain on the optical cable with substantially zero stress on the optical fibers is determined by equations (1) and (2) below: ɛ = π 2 ( D + d 2 ) 2 + p 2 _ π 2 ( D - d 2 ) 2 + p 2 _ π 2 dD _ - 10 dD _ ; ( 1 ) ɛ × 100 = Percent elongation or contraction ; ( 2 ) where d is the amount of optical fiber clearance for free movement within the flexible protective tube, D is an average helical diameter of the helically wound flexible protective tubes, and p is an average helical pitch of the helically wound flexible protective tubes.
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公开(公告)号：US10983018B2
公开(公告)日：2021-04-20
申请号：US16844795
申请日：2020-04-09
申请人： OFS FITEL, LLC
发明人： Robert S Dyer , Jie Li , John E Pacini , Brian Violette
摘要： Disclosed herein is an optical cable comprising a support; flexible protective tubes helically wound around the support, each flexible protective tube comprising an optical fiber comprising an optical core; a cladding disposed on the core; and a primary coating external to the cladding; and a deformable material surrounding the optical fiber; an outer jacket surrounding the flexible protective tubes; wherein each optical fiber is about 0.5% to about 1.5% longer than its respective flexible protective tube; wherein an allowable strain on the optical cable with substantially zero stress on the optical fibers is determined by equations (1) and (2) below: ɛ = π 2 ( D + d 2 ) 2 + p 2 _ π 2 ( D - d 2 ) 2 + p 2 _ π 2 dD _ - 10 dD _ ; ( 1 ) ɛ × 100 = Percent elongation or contraction ; ( 2 ) where d is the amount of optical fiber clearance for free movement within the flexible protective tube, D is an average helical diameter of the helically wound flexible protective tubes, and p is an average helical pitch of the helically wound flexible protective tubes.
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3.发明授权公开(公告)号：US10648876B2
公开(公告)日：2020-05-12
申请号：US16040950
申请日：2018-07-20
申请人： OFS Fitel, LLC
发明人： Robert S Dyer , Jie Li , John E Pacini , Brian Violette
摘要： Disclosed herein is an optical cable comprising a plurality of cable sensors helically wound around a support; and an outer jacket that is disposed on the plurality of cable sensors and surrounds the plurality of cable sensors; where each cable sensor comprises an optical fiber; where the optical fiber comprises an optical core upon which is disposed a cladding; a primary coating; a deformable material surrounding the optical fiber; and an outer tube surrounding the deformable material; where the optical fiber is of equal length to the outer tube; and where an allowable strain on the optical cable with zero stress on the optical fiber is determined by equations (1) and (2) below: ɛ = π 2 ( D + d 2 ) 2 + p 2 p - π 2 ( D - d 2 ) 2 + p 2 p = π 2 dD p 2 = 10 dD p 2 ( 1 ) ɛ × 100 = Percent elongation or contraction ; ( 2 ) where d is the amount of optical fiber clearance for free movement within the loose tube, D is an average pitch diameter of the plurality of cable sensors and p is an average pitch length of a helical turn of the plurality of cable sensors wound around the central strength member.
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公开(公告)号：US10401573B2
公开(公告)日：2019-09-03
申请号：US15935643
申请日：2018-03-26
申请人： OFS Fitel, LLC
摘要： Embodiments are directed to a method and device for coupling an optical fiber sensing element to an apparatus under test. A channel is affixed to the apparatus under test. The channel is partially filled with a coupling material. The fiber optic sensing element is placed on the coupling material. Coupling material is placed in the channel to uniformly surround the fiber optic sensing element and tightly couple the fiber optic sensing element to the apparatus under test.
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5.发明申请公开(公告)号：US20190033145A1
公开(公告)日：2019-01-31
申请号：US16040950
申请日：2018-07-20
申请人： OFS Fitel, LLC
发明人： Robert S Dyer , Jie Li , John E Pacini , Brian Violette
摘要： Disclosed herein is an optical cable comprising a plurality of cable sensors helically wound around a support; and an outer jacket that is disposed on the plurality of cable sensors and surrounds the plurality of cable sensors; where each cable sensor comprises an optical fiber; where the optical fiber comprises an optical core upon which is disposed a cladding; a primary coating; a deformable material surrounding the optical fiber; and an outer tube surrounding the deformable material; where the optical fiber is of equal length to the outer tube; and where an allowable strain on the optical cable with zero stress on the optical fiber is determined by equations (1) and (2) below: ɛ = π 2 ( D + d 2 ) 2 + p 2 p - π 2 ( D - d 2 ) 2 + p 2 p = π 2 dD p 2 = 10 dD p 2 ( 1 ) ɛ × 100 = Percent elongation or contraction ; ( 2 ) where d is the amount of optical fiber clearance for free movement within the loose tube, D is an average pitch diameter of the plurality of cable sensors and p is an average pitch length of a helical turn of the plurality of cable sensors wound around the central strength member.
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公开(公告)号：US20240103214A1
公开(公告)日：2024-03-28
申请号：US18275247
申请日：2022-02-02
申请人： OFS Fitel, LLC
发明人： Robert S Dyer , Adam Hokansson , Matthew Popelka , Brian Savran , Paul S Westbrook , Vixay R Soundara , Andrei A Stolov
IPC分类号： G02B6/02 , C03B37/10 , C03C13/04 , C03C25/106
CPC分类号： G02B6/02104 , C03B37/10 , C03C13/04 , C03C25/106 , G02B6/02123 , C03C2213/00 , G02B2006/02161
摘要： Described herein are systems, methods, and articles of manufacture for a coated fiber modified by actinic radiation to increase back-scattering, which experiences very little back-scattering decay at a temperature and time of exposure that is sufficient to noticeably degrade the coating and/or noticeably degrade the optical fiber due to outgassing of hydrogen from the coating. In one embodiment, an optical fiber comprises a fiber length, a coating having a treated coating weight, wherein the treated coating weight is at least 25% less of an original coating weight prior to an annealing treatment, and an optical back-scatter along the fiber length greater than a Rayleigh back-scattering over the fiber length, wherein the optical back-scatter does not decrease along the fiber length by more than 3 dB after exposure to annealing treatment. A further embodiment relates to a method comprising receiving an optical fiber at an inlet of at least one heat source, the optical fiber including a coating having an original coating weight and an optical back-scatter along a fiber length and applying an annealing treatment to the optical fiber by the least one heat source at a predetermined temperature Ta during a predetermined time ta, wherein the original coating weight is reduced by at least 25% to a treated coating weight during the annealing treatment, wherein the optical back-scatter does not decrease along the fiber length by more than 3 dB after the annealing treatment.
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公开(公告)号：US10401563B2
公开(公告)日：2019-09-03
申请号：US16129159
申请日：2018-09-12
申请人： OFS Fitel, LLC
发明人： Kyle Bedard , Robert S Dyer , Jie Li , Xiaoguang Sun
IPC分类号： G02B6/036 , G01K11/32 , G01B11/16 , C03B37/012 , C03B37/025 , C03C13/04
摘要： Disclosed herein is an optical fiber comprising a plurality of dopant concentration profiles in a core of the optical fiber; where the first dopant concentration and the second dopant concentration are each varied in a stepwise manner and wherein a ratio of the first dopant concentration to the second dopant concentration is operative to result in an interaction of a fundamental optical mode at a given wavelength with a plurality of acoustic modes thereby increasing a ratio of Brillouin Scattering intensity ratio of secondary, tertiary or quarternary peak relative to a Brillouin Scattering intensity of a primary peak to be greater than 0.4 in a Brillouin Scattering spectrum.
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公开(公告)号：US20190187367A1
公开(公告)日：2019-06-20
申请号：US16129159
申请日：2018-09-12
申请人： OFS Fitel, LLC
发明人： Kyle Bedard , Robert S Dyer , Jie Li , Xiaoguang Sun
IPC分类号： G02B6/036 , G01K11/32 , G01B11/16 , C03C13/04 , C03B37/012 , C03B37/025
CPC分类号： G02B6/036 , C03B37/01262 , C03B37/025 , C03C13/045 , C03C2213/00 , G01B11/16 , G01K11/32 , G01K2011/322 , G01L1/242
摘要： Disclosed herein is an optical fiber comprising a plurality of dopant concentration profiles in a core of the optical fiber; where the first dopant concentration and the second dopant concentration are each varied in a stepwise manner and wherein a ratio of the first dopant concentration to the second dopant concentration is operative to result in an interaction of a fundamental optical mode at a given wavelength with a plurality of acoustic modes thereby increasing a ratio of Brillouin Scattering intensity ratio of secondary, tertiary or quarternary peak relative to a Brillouin Scattering intensity of a primary peak to be greater than 0.4 in a Brillouin Scattering spectrum.
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