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公开(公告)号：US20210157053A1
公开(公告)日：2021-05-27
申请号：US17168468
申请日：2021-02-05
摘要： An optical fiber line of one embodiment comprises an HNLF, an SMF, and an MFD transition portion. The MFD transition portion includes end portions of both the HNLF and the SMF facing with a fusion point thereof, and is a section in which an MFD changes such that a difference between a maximum value and a minimum value is 0.3 μm or more for a 100 μm-length. A splicing loss of the HNLF and the SMF at 1,550 nm is one-fifth or less than an ideal butting loss at stationary portions thereof. A total length of the MFD transition portion is 10 mm or less. In a region between one end surface of the HNLF at the fusion point and the other end surface separated from the one end surface by 50 μm or more and 300 μm or less, the MFD increases monotonically from the other end surface to the one end surface.
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公开(公告)号：US20170153375A1
公开(公告)日：2017-06-01
申请号：US15356857
申请日：2016-11-21
摘要： Provided are an optical fiber that has a short zero-dispersion wavelength, has high nonlinearity, and can cause broadband supercontinuum light to be generated with high efficiency, and a light source device that can output broadband supercontinuum light by using the optical fiber. A light source device includes a seed light source that outputs light with a central wavelength 1000 nm or more and 1650 nm or less and an optical fiber that receives the light output from the seed light source, allows the light to propagate therethrough, causes broadband light with an expanded band to be generated in accordance with a nonlinear optical phenomenon while the light propagates therethrough, and outputs the broadband light. The optical fiber is composed of silica glass, has a zero-dispersion wavelength of 1290 nm to 1350 nm, and has an effective area of 14 μm2 or smaller at a wavelength of 1550 nm.
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公开(公告)号：US20130343717A1
公开(公告)日：2013-12-26
申请号：US13923869
申请日：2013-06-21
IPC分类号： G02B6/44
CPC分类号： G02B6/44 , C03C25/106 , C03C25/1065 , C08G18/282 , C08G18/289 , C08G18/48 , C08G18/672 , C09D175/04 , G02B6/02395 , G02B6/03627
摘要： A coated optical fiber 1 comprising a glass fiber 10 and a primary coating layer 20 on the outer circumference of the glass fiber 10, wherein a resin constituting the primary coating layer 20 contains ingredient(s) having a molecular weight of more than 1,000, which is extracted with methyl ethyl ketone, in an amount of 5% by weight or more and 21% by weight or less and has a Young's modulus of 0.2 to 1.0 MPa. The resin constituting the primary coating layer 20 of the coated optical fiber 1 has a good curability, and the coated optical fiber 1 exhibits a reduced microbending loss.
摘要翻译： 包含在玻璃纤维10的外周上的玻璃纤维10和一次被覆层20的被覆光纤1，其中构成一次被覆层20的树脂含有分子量大于1000的成分， 用甲基乙基酮提取，其量为5重量％以上且21重量％以下，杨氏模量为0.2〜1.0MPa。 构成被覆光纤1的一次被覆层20的树脂具有良好的固化性，涂布光纤1的微弯损失降低。
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公开(公告)号：US20170075060A1
公开(公告)日：2017-03-16
申请号：US15363154
申请日：2016-11-29
CPC分类号： G02B6/02019 , C03B2203/22 , C03B2203/23 , G02B6/036 , G02B6/03611 , G02B6/03627 , G02B6/03633
摘要： Provided is an optical fiber having W-shaped refractive-index distribution and in which a micro-bend loss in an actual usage waveband is reduced. The optical fiber includes a core, inner cladding that surrounds the core and has a refractive index smaller than a refractive index of the core, and outer cladding that surrounds the inner cladding and has a refractive index smaller than the refractive index of the core and larger than the refractive index of the inner cladding. When a coupling coefficient between a fundamental mode and a cladding mode is denoted by C01-CL, a coupling coefficient between the fundamental mode and a higher-order mode is denoted by C01-11, and a coupling coefficient between the higher-order mode and the cladding mode is denoted by C11-CL, Ctotal defined as Ctotal=C01-CL+C01-11C11-CL has a minimum value at a wavelength ranging between 1520 nm and 1630 nm.
摘要翻译： 提供了具有W形折射率分布并且实际使用波段中的微弯曲损耗减小的光纤。 光纤包括芯，围绕芯并且具有小于芯的折射率的折射率的内包层和围绕内包层并具有小于芯的折射率的折射率的较大的外包层 比内包层的折射率高。 当基模和包层模式之间的耦合系数由C01-CL表示时，基模和高阶模之间的耦合系数由C01-11表示，高阶模和 包层模式由C11-CL表示，Ctotal定义为Ctotal = C01-CL + C01-11C11-CL在1520nm和1630nm之间的波长范围内具有最小值。
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公开(公告)号：US20210132291A1
公开(公告)日：2021-05-06
申请号：US17145837
申请日：2021-01-11
摘要： An optical fiber according to an embodiment includes a core and a cladding. The average value n1_ave of the refractive index of the core, the minimum value nc_min of the refractive index of the cladding, and the refractive index n0 of pure silica glass satisfy relationships of n1_ave>nc_min and nc_min
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公开(公告)号：US20170131468A1
公开(公告)日：2017-05-11
申请号：US15414857
申请日：2017-01-25
CPC分类号： G02B6/03627 , C03B2203/22 , C03B2203/23 , C03B2203/24 , G02B6/02019 , G02B6/03611 , G02B6/0365
摘要： The present embodiment relates to an optical fiber having a W-type refractive index d profile or a trench-type refractive index profile and having reduced microbending loss in a wavelength band to be actually used. The optical fiber includes a center core, an inner cladding surrounding the center core, and an outer cladding surrounding the inner cladding. The inner cladding has a refractive index lower than a refractive index of at least the center core and the outer cladding has a refractive index lower than the refractive index of the center core and higher than the refractive index of the inner cladding. Wavelength dependency of microbending loss has a local maximal value and a shortest wavelength λth where the microbending loss becomes 10% of the local maximal value is longer than 1560 nm.
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公开(公告)号：US20170031088A1
公开(公告)日：2017-02-02
申请号：US15279065
申请日：2016-10-14
CPC分类号： G02B6/02019 , G02B6/02266 , G02B6/0281 , G02B6/03627 , G02B6/4404 , G02B6/4409
摘要： An optical fiber cable has a sectional area of Ac [mm2] and housing a number N of optical fibers. A transmission loss αdB [dB/km], a mode field diameter W [μm], an effective area Aeff [μm2], an effective length Leff [km], and a wavelength dispersion D [ps/nm/km] of each of the optical fibers at a wavelength of 1550 nm satisfy a predetermined, equation and the transmission loss of the optical fiber at the wavelength of 1550 nm is 0.19 dB/km or less, and the effective area of the optical fiber is in a range from 125 to 155 μm2.
摘要翻译： 光纤电缆的截面积为Ac [mm2]，并容纳N根光纤。 传输损耗αdB[dB / km]，模场直径W [μm]，有效面积Aeff [μm2]，有效长度Leff [km]和波长色散D [ps / nm / km] 波长1550nm的光纤满足规定的方程式，1550nm波长的光纤的传输损耗为0.19dB / km以下，光纤的有效面积为125nm 至155μm2。
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公开(公告)号：US20150316713A1
公开(公告)日：2015-11-05
申请号：US14337420
申请日：2014-07-22
发明人： Yoshinori YAMAMOTO , Masaaki HIRANO
CPC分类号： G02B6/0228 , G02B6/02042 , G02B6/02276 , G02B6/03633 , H04B10/2525
摘要： An optical fiber includes a core and a cladding that surrounds the core. The optical fiber has a group index of 1.465 or less at a wavelength of 1550 nm and an absolute value of chromatic dispersion of 4 ps/nm/km or less at a wavelength of 1550 nm. A relative refractive index difference between the core and pure silica ranges from −0.1% to 0.1%. The core includes a first core disposed at the center of the optical fiber and a second core surrounding the first core. A relative refractive index difference between the first core and the cladding ranges from 0.6% to 0.9%. A relative refractive index difference between the second core and the cladding ranges from 0.02% to 0.12%. The ratio of the diameter of the second core to the diameter of the first core ranges from 2.0 to 6.0.
摘要翻译： 光纤包括围绕芯的芯和包层。 该光纤在1550nm的波长处的组指数为1.465以下，在1550nm的波长下的色散的绝对值为4ps / nm / km以下。 芯和纯二氧化硅之间的相对折射率差为-0.1％至0.1％。 芯包括设置在光纤中心的第一芯和围绕第一芯的第二芯。 第一芯和包层之间的相对折射率差为0.6％至0.9％。 第二芯和包层之间的相对折射率差为0.02％至0.12％。 第二芯的直径与第一芯的直径的比率为2.0至6.0。
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公开(公告)号：US20190162895A1
公开(公告)日：2019-05-30
申请号：US16194574
申请日：2018-11-19
发明人： Yoshinori YAMAMOTO
IPC分类号： G02B6/02
摘要： An optical fiber made of silica glass includes a core having a maximum refractive index n1, a depressed portion surrounding the core and having an average refractive index n2, and cladding surrounding the depressed portion and having an average refractive index n3. In the optical fiber, n1>n3>n2. The optical fiber has a local maximum value of chromatic dispersion within a wavelength range of 1530 nm to 1610 nm, and the local maximum value is −2 ps/nm/km or greater and below 0 ps/nm/km. (86 words)
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公开(公告)号：US20180329137A1
公开(公告)日：2018-11-15
申请号：US15973851
申请日：2018-05-08
发明人： Yoshinori YAMAMOTO
CPC分类号： G02B6/02014 , G02B6/0281 , G02B6/03627
摘要： An optical fiber includes a core having a maximum refractive index n1, and cladding provided around the core and having a refractive index n0 that is lower than the maximum refractive index n1. A radial refractive-index profile of the core is expressed with an exponent a that is 1.5 to 10. A relative refractive-index difference Δ1 at a center of the core that is expressed as Δ1=100×(n12−n02)/(2n12) is 0.3% to 0.5%. A diameter 2a of the core is 9 μm to 14 μm. A zero-dispersion wavelength is 1300 nm to 1324 nm. A cable cutoff wavelength λcc is 1260 nm or shorter. A bending loss at a wavelength of 1550 nm in a case where the optical fiber is wound by ten turns with a bend diameter of 30 mm is 0.25 dB or smaller.
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