公开(公告)号：US08958675B2

公开(公告)日：2015-02-17

申请号：US13833769

申请日：2013-03-15

Applicant: Corning Incorporated

Inventor： Scott Robertson Bickham ,  Xin Chen ,  Ming-Jun Li ,  Dale Robert Powers ,  Richard Stephen Vodhanel

IPC: G02B6/02 ,  H04B10/2513 ,  G02B6/028 ,  H04B10/2507 ,  H04B10/2581 ,  G02B6/26 ,  H04B10/079 ,  G02B6/036

CPC classification number: H04B10/2513 ,  G02B6/02261 ,  G02B6/0288 ,  G02B6/03627 ,  G02B6/268 ,  H04B10/07951 ,  H04B10/2507 ,  H04B10/2581

Abstract: Multimode optical fiber systems with adjustable chromatic modal dispersion compensation are disclosed, wherein the system includes a VCSEL light source and primary and secondary optically coupled multimode optical fibers. Because the VCSEL light source has a wavelength spectrum that radially varies, its use with the primary multimode optical fiber creates chromatic modal dispersion that reduces bandwidth. The compensating multimode optical fiber is designed to have a difference in alpha parameter relative to the primary multimode optical fiber of −0.1≦Δα≦−0.9. This serves to create a modal delay opposite to the chromatic modal dispersion. The compensation is achieved by using a select length of the compensating multimode optical fiber optically coupled to an output end of the primary multimode optical fiber. The compensating multimode optical fiber can be configured to be bend insensitive.

Abstract translation: 公开了具有可调色散色散补偿的多模光纤系统，其中该系统包括VC​​SEL光源和一次和二次光耦合多模光纤。 由于VCSEL光源具有径向变化的波长光谱，因此其与主多模光纤的使用产生减少带宽的色模色散。 补偿多模光纤被设计为相对于-0.1＆nlE;＆Dgr;α＆nlE; -0.9的主多模光纤具有不同的α参数。 这用于产生与色模色散相反的模态延迟。 通过使用光耦合到主多模光纤的输出端的补偿多模光纤的选择长度来实现补偿。 补偿多模光纤可以被配置为弯曲不敏感。

公开(公告)号：US20140119701A1

公开(公告)日：2014-05-01

申请号：US14060938

申请日：2013-10-23

Applicant: Corning Incorporated

Inventor： Xin Chen ,  Ming Jun Li ,  Dale Robert Powers

IPC: G02B6/028

CPC classification number: G02B6/0288 ,  G02B6/0281 ,  G02B6/0365

Abstract: A multimode optical fiber includes: (i) a graded index glass core having a radius R1 in the range of 20 microns to 50 microns, a maximum relative refractive index Δ1MAX in the range between 0.5% and 3%; a graded index having a profile with (a) by an alpha (α) parameter wherein 1.9≦α≦2.2, and (b) a deviation from the alpha profile in at least one region of the core, such that the difference in the refractive index delta of the core from that determined by the core alpha value, at the radius R1 is less than 0.001, and (ii) a cladding surrounding and in contact with the core, wherein the fiber has an bandwidth greater than 5000 MHz-km at a wavelength λ where λ≧800 nm.

Abstract translation: 多模光纤包括：（i）半径R1在20微米至50微米范围内的渐变折射率玻璃芯，最大相对折射率＆Dgr; 1MAX在0.5％和3％之间的范围内; 具有（a）通过α（α）参数的轮廓的分级索引，其中1.9和nlE;α和nlE; 2.2，和（b）与核心的至少一个区域中的α分布的偏差，使得 核心的折射率Δδ与由核心α值在半径R1处确定的折射率差值小于0.001，和（ii）围绕并与芯体接触的包层，其中光纤具有大于5000MHz-km的带宽 在λ≥800nm的波长λ处。

公开(公告)号：US12267106B2

公开(公告)日：2025-04-01

申请号：US17725924

申请日：2022-04-21

Applicant: CORNING INCORPORATED

Inventor： Xin Chen ,  Kangmei Li ,  Ming-Jun Li

IPC: H04B10/07 ,  H04B10/079 ,  H04B10/2581 ,  H04B10/54 ,  H04B10/077 ,  H04B10/25

Abstract: A method including transmitting an intensity-modulated light through a mode conditioner to generate a mode-conditioned intensity-modulated light in one or a plurality of launch conditions and transmitting the mode-conditioned intensity-modulated light through a multimode optical fiber under test (FUT) to excite a plurality of modes of the FUT. The method further includes converting the mode-conditioned intensity-modulated light transmitted through the FUT into an electrical signal, measuring, based on the electrical signal, a complex transfer function CTF(f) of the FUT, and obtaining an output pulse based on the measured complex transfer function CTF(f) from one or a plurality of launch conditions and an assumed input pulse using the equation: Pout (t)=−1(CTF(f)*(Pin(t))). Wherein, Pout (t) is the output pulse, −1(CTF(f)*(Pin(t))) is the inverse Fourier transform of the function CTF(f)*(Pin (t)), and (Pin(t)) is the Fourier transform of the assumed input pulse. Additionally, the method includes calculating modal bandwidth of the FUT based on Pout(t).

公开(公告)号：US20250007609A1

公开(公告)日：2025-01-02

申请号：US18754492

申请日：2024-06-26

Applicant: CORNING INCORPORATED

Inventor： Kevin Wallace Bennett ,  Xin Chen ,  Rostislav Radiyevich Khrapko ,  Daniel Aloysius Nolan

IPC: H04B10/2581 ,  G02B6/036 ,  H04J14/04

Abstract: Mode Division Multiplexing (MDM) systems using step-index multimode fibers (MMF) are disclosed herein, where the step-index MMF includes at least one glass core and at least one cladding surrounding the core, wherein the step-index MMF comprises a spin profile that was imparted into the step-index MMF during draw by a spinning apparatus according to a spin function, wherein the spin function comprises at least one of sinusoidal function, a Amplitude Modulation (AM) function, a Frequency Modulation (FM) function, or a combination thereof.

公开(公告)号：US20220137289A1

公开(公告)日：2022-05-05

申请号：US17514060

申请日：2021-10-29

Applicant: CORNING INCORPORATED

Inventor： Xin Chen ,  Hao Dong ,  Kangmei Li ,  Ming-Jun Li ,  Pushkar Tandon ,  Scott Robertson Bickham

IPC: G02B6/028 ,  G02B6/02

Abstract: A optical fiber comprising a central core region having an outer radius r1 of 3 μm to 7 μm, and a maximum refractive index Δ1 of 0.25% to 0.5% and an alpha (a) profile of 1 to 20; a cladding region comprising (i) a first inner cladding region surrounding the core, having a refractive index Δ2 of −0.25% to 0.05% and a radius r2 of 6 μm to 15 μm, (ii) a second inner cladding region, surrounding the first inner cladding region, having a refractive index Δ3 of −0.1% to 0.2% and a radius r3 of 7 μm to 15 μm, and (iii) an outer cladding region, surrounding the second inner cladding region, having a refractive index Δ4 between −0.05% to 0.1%; wherein the optical fiber exhibits a cable cutoff of less than 1260 nm, a mode field diameter at 1310 nm of greater than 8.2 microns.

公开(公告)号：US20210026063A1

公开(公告)日：2021-01-28

申请号：US16930811

申请日：2020-07-16

Applicant: CORNING INCORPORATED

Inventor： Xin Chen ,  Kangmei Li ,  Ming-Jun Li

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/028 ,  H04B10/25 ,  H04B10/50 ,  H04B10/66

Abstract: The optical fibers disclosed have single mode and few mode optical transmission for VCSEL-based optical fiber transmission systems. The optical fibers have a cable cutoff wavelength λd C of equal to or below 1260 nm thereby defining single mode operation at wavelengths greater than 1260 nm and few-mode operation at wavelengths in a wavelength range from 800 nm and 1100 nm. The mode-field diameter is in the range from 8.0 microns to 10.1 microns at 1310 nm. The optical fibers have an overfilled bandwidth OFL BW of at least 1GHz·km at at least one wavelength in the wavelength range. The optical fibers have a single-step or two-step core and can have a trench refractive index profile. VCSEL based optical transmission systems and methods are disclosed that utilize both single core and multicore versions of the optical fiber.

公开(公告)号：US20200257040A1

公开(公告)日：2020-08-13

申请号：US16747179

申请日：2020-01-20

Applicant: CORNING INCORPORATED

Inventor： Xin Chen ,  Ming-Jun Li

IPC: G02B6/028 ,  G02B6/42 ,  G02B6/036

Abstract: The optical fibers disclosed have single mode and few mode optical transmission for VCSEL-based optical fiber transmission systems. The optical fibers have a cable cutoff wavelength λC of equal to or below 1260 nm thereby defining single mode operation at a wavelength in a first wavelength range greater than 1260 nm and few-mode operation at a wavelength in a second wavelength range from 840 nm and 1060 nm. The mode-field diameter is in the range from 8.6 microns to 11 microns at 1550 nm or in the range from 8.0 microns to 10.1 microns at 1310 nm. The optical fibers have an overfilled bandwidth OFL BW of at least 1 GHz·km at the at least one wavelength in the second wavelength range. The optical fibers have a gradient-index core and can have a trench refractive index profile. VCSEL based optical transmission systems and methods are disclosed that utilize both single core and multicore versions of the optical fiber.

公开(公告)号：US10131566B2

公开(公告)日：2018-11-20

申请号：US14253994

申请日：2014-04-16

Applicant: Corning Incorporated

Inventor： Jennifersue A. Bowker ,  Xin Chen ,  Jason Edward Hurley ,  Elios Klemo ,  Igor Rafaelyevich Mejouev ,  Daniel Aloysius Nolan ,  Dale Robert Powers

IPC: C03B37/00 ,  C03B37/025 ,  G01M11/00 ,  G02B6/028

Abstract: Methods for modifying multi-mode optical fiber manufacturing processes are disclosed. In one embodiment, a method for modifying a process for manufacturing multi-mode optical fiber includes measuring at least one characteristic of a multi-mode optical fiber. The at least one characteristic is a modal bandwidth or a differential mode delay at one or more wavelengths. The method further includes determining a measured peak wavelength of the multi-mode optical fiber based on the measured characteristic, determining a difference between the target peak wavelength and the measured peak wavelength, and modifying the process for manufacturing multi-mode optical fiber based on the difference between the target peak wavelength and the measured peak wavelength.

公开(公告)号：US20170047997A1

公开(公告)日：2017-02-16

申请号：US14825704

申请日：2015-08-13

Applicant: Corning Incorporated

Inventor： Xin Chen ,  Ming-Jun Li

IPC: H04B10/2581 ,  G02B6/14 ,  G02B6/44 ,  H04B10/50 ,  H04B10/40 ,  H04B10/516 ,  H04B10/572 ,  G02B6/028 ,  G02B6/38

CPC classification number: H04B10/2581 ,  G02B6/0288 ,  G02B6/14 ,  G02B6/268 ,  G02B6/3846 ,  G02B6/421 ,  G02B6/4471 ,  H04B10/40 ,  H04B10/503 ,  H04B10/516 ,  H04B10/572

Abstract: A multimode optical transmission system and method that employs a higher-order-mode (HOM)-filter fiber. The system includes a transmitter has a light source that generates modulated light and that has a spatially non-uniform light emission. The system also has an optical receiver with a photodetector that receives and detects the modulated light. A multimode optical fiber link that includes a multimode optical fiber optically connects the light source and the photodetector. At least one HOM-filter fiber is optically connected to the multimode optical fiber. The HOM-filter fiber is configured to gives rise to an optical loss of 1 dB or less while increasing the modal bandwidth of the system by at least 10% as compared to using only the multimode optical fiber.

Abstract translation: 一种采用高阶模（HOM）滤波光纤的多模光传输系统和方法。 该系统包括具有产生调制光并具有空间不均匀光发射的光源的发射器​​。 该系统还具有光接收器，其具有接收和检测调制光的光电检测器。 包括多模光纤的多模光纤链路将光源和光电检测器光学连接。 至少一个HOM滤光器光纤与多模光纤光学连接。 与仅使用多模光纤相比，HOM滤波器光纤被配置为产生1dB或更小的光损耗，同时将系统的模式带宽增加至少10％。

公开(公告)号：US09377377B2

公开(公告)日：2016-06-28

申请号：US14248852

申请日：2014-04-09

Applicant: Corning Incorporated

Inventor： Xin Chen ,  Jason Edward Hurley ,  Daniel Aloysius Nolan ,  Richard Stephen Vodhanel

IPC: G01M11/00 ,  H04B10/2581 ,  H04B10/073

CPC classification number: G01M11/333 ,  G01M11/335 ,  H04B10/0731 ,  H04B10/2581

Abstract: Methods and apparatus for measuring the modal bandwidth of a multimode optical fiber as a function of wavelength are disclosed. The methods include emitting polarized light from a single-mode fiber, frequency-modulating the single-mode polarized light, and then conditioning the frequency-modulated polarized light to excite multiple modes of the multimode optical fiber. The multimode light transmitted by the multimode optical fiber is detected and analyzed by a network analyzer to determine a bandwidth for at least three different wavelengths. A controller performs a fit to the measured bandwidths using a fitting equation to determine the modal bandwidth as a function of wavelength.

Abstract translation: 公开了用于测量作为波长的函数的多模光纤的模式带宽的方法和装置。 这些方法包括从单模光纤发射偏振光，对单模偏振光进行频率调制，然后对频率调制的偏振光进行调理以激发多模光纤的多种模式。 由多模光纤传输的多模光被网络分析仪检测和分析，以确定至少三种不同波长的带宽。 控制器使用拟合方程来对测量的带宽进行拟合，以确定作为波长的函数的模态带宽。