公开(公告)号：US20140368809A1

公开(公告)日：2014-12-18

申请号：US14251869

申请日：2014-04-14

Applicant: CORNING INCORPORATED

Inventor： Xin Chen ,  Jason Edward Hurley ,  Ming-Jun Li ,  Richard Stephen Vodhanel

IPC: G01M11/00

CPC classification number: G01M11/338 ,  G01M11/335

Abstract: A differential mode delay (DMD) measurement system for an optical fiber is provided. The system includes an optical test fiber with a plurality of modes; a single mode light source that provides a continuous light wave signal to a modulator; and a pulse generator that provides an electrical pulse train signal to the modulator and a triggering signal to a receiver. The modulator is configured to generate a modulated optical test signal through the optical fiber based at least in part on the received light wave and pulse train signals, and the receiver is configured to receive the test signal transmitted through the fiber and evaluate the test signal based at least in part on the triggering signal. The system can be employed to create DMD waveform and centroid charts to obtain minEMBc bandwidth information for a fiber within a wavelength range.

Abstract translation: 提供了一种用于光纤的差模延迟（DMD）测量系统。 该系统包括具有多种模式的光学测试光纤; 单模光源，向调制器提供连续的光波信号; 以及脉冲发生器，其向调制器提供电脉冲串信号和向接收器提供触发信号。 调制器被配置为至少部分地基于接收的光波和脉冲串信号通过光纤产生调制的光学测试信号，并且接收器被配置为接收通过光纤传输的测试信号并且基于 至少部分地基于触发信号。 该系统可用于创建DMD波形和质心图，以获得波长范围内的光纤的minEMBc带宽信息。

公开(公告)号：US20250004193A1

公开(公告)日：2025-01-02

申请号：US18738204

申请日：2024-06-10

Applicant: CORNING INCORPORATED

Inventor： Hao Chen ,  Xin Chen ,  Ming-Jun Li ,  Qi Wu

IPC: G02B6/028

Abstract: A modal-conditioning, single-mode fiber generally includes a core portion and a cladding portion. The core portion includes a core and an inner cladding. The core comprises an outer radius r1 and a maximum relative refractive index Δ1max. The inner cladding comprises an outer radius r2 and a relative refractive index Δ2. The cladding portion surrounds the core portion and includes a low-index trench surrounding the inner cladding. The low-index trench includes an outer radius r3 and a minimum relative refractive index Δ3min. The radius r2 of the inner cladding may be greater than 12 μm and Δ1max>Δ2>Δ3min. The fiber comprises a mode field diameter MFD greater than or equal to 12 μm and less than or equal to 16 μm at a wavelength of 1310 nm and a 30 mm diameter bend loss of less than or equal to 0.5 dB/turn at 1310 nm.

公开(公告)号：US20230305221A1

公开(公告)日：2023-09-28

申请号：US17903319

申请日：2022-09-06

Applicant: CORNING INCORPORATED

Inventor： Scott Robertson Bickham ,  Xin Chen ,  Kangmei Li ,  Ming-Jun Li

IPC: G02B6/02 ,  G02B6/028 ,  G02B6/036

CPC classification number: G02B6/02004 ,  G02B6/0281 ,  G02B6/0365

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 970 nm and 1070 nm. The mode-field diameter is in the range from 9.3 microns to 10.9 microns at 1550 nm. The optical fibers have an overfilled bandwidth OFL BW of 1 GHz.km to 3 GHz.km at the at least one wavelength in the second wavelength range. 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：US20220376786A1

公开(公告)日：2022-11-24

申请号：US17725924

申请日：2022-04-21

Applicant: CORNING INCORPORATED

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

IPC: H04B10/079 ,  H04B10/54 ,  H04B10/2581

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：US10295734B2

公开(公告)日：2019-05-21

申请号：US15588047

申请日：2017-05-05

Applicant: Corning Incorporated

Inventor： Dana Craig Bookbinder ,  Xin Chen ,  John Douglas Coleman ,  Ming-Jun Li

IPC: G02B6/28 ,  G02B6/028 ,  G02B6/02 ,  G02B6/38 ,  G02B6/44 ,  H04B10/40 ,  G02B6/036

Abstract: Disclosed is an optical fiber which includes a core including silica with a core diameter and having at least two dopants, a maximum relative refractive index delta of at least 0.7% and an alpha value in the range of 1.9-2.2. The core has a refractive index profile configured to transmit light in a multimode propagation at a first wavelength λ1 in the range of 800-1100 nm and to propagate light in a LP01 mode at a second wavelength λ2. The second wavelength λ2 is greater than 1200 nm. The optical fiber is structured to have a LP01 mode field diameter in the range of 8.5-12.5 μm at 1310 nm.

公开(公告)号：US20190049659A1

公开(公告)日：2019-02-14

申请号：US16160262

申请日：2018-10-15

Applicant: CORNING INCORPORATED

Inventor： Xin Chen ,  Ming-Jun Li

IPC: G02B6/02 ,  G02B6/26 ,  G02B6/036 ,  G02B6/028 ,  H04B10/60 ,  H04B10/2581 ,  H04B10/50

CPC classification number: G02B6/02047 ,  G02B6/0288 ,  G02B6/0365 ,  G02B6/268 ,  H04B10/2581 ,  H04B10/50 ,  H04B10/60

Abstract: Some embodiments of the disclosure relate to an optical transmission system that operates at a wavelength in the range from 950 nm to 1600 nm and that employs a single-mode optical transmitter and an optical receiver optically coupled to respective ends of a multimode fiber designed for 850 nm multimode operation. The optical transmission system also employs at least one single mode fiber situated within the optical pathway between the optical transmitter and the receiver and coupled to the multimode fiber.

公开(公告)号：US20170146428A1

公开(公告)日：2017-05-25

申请号：US15298385

申请日：2016-10-20

Applicant: Corning Incorporated

Inventor： Scott Robertson Bickham ,  Dana Craig Bookbinder ,  Xin Chen ,  Steven Craig Garner, JR. ,  Ming-Jun Li ,  Dale Robert Powers

IPC: G01M11/00 ,  G01J7/00 ,  G02B6/02 ,  H04B10/27

CPC classification number: G01M11/30 ,  G01J7/00 ,  G02B6/02214 ,  H04B10/2581 ,  H04B10/27

Abstract: Methods of selecting, from a set of like optical fibers, a subset of optical fibers that can meet both short-wavelength and target-wavelength bandwidth requirements are disclosed. The method includes obtaining short-wavelength bandwidth data from DMD measurements, and determining a peak wavelength for each optical fiber. A target-wavelength bandwidth is then calculated using the determined peak wavelengths. The calculated target bandwidth is then compared to the short-wavelength and target-wavelength bandwidth requirements to identify which of the optical fibers satisfy these requirements.

公开(公告)号：US20170068046A1

公开(公告)日：2017-03-09

申请号：US15119992

申请日：2015-02-18

Applicant: Corning Incorporated

Inventor： Scott Robertson Bickham ,  Xin Chen ,  Ming-Jun Li

IPC: G02B6/028 ,  H04B10/2581 ,  H04B10/61 ,  G02B6/036 ,  H04B10/50

CPC classification number: G02B6/0288 ,  C03B2203/26 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/0365 ,  H04B10/2581 ,  H04B10/503 ,  H04B10/6161

Abstract: According to some embodiments, a multimode optical fiber comprises a graded index glass core with refractive index Δ1, a maximum refractive index delta Δ1MAX, and a core radius between 10 and 40 microns; and cladding region surrounding the core comprising refractive index Δ4, wherein the fiber exhibits an overfilled bandwidth exhibits an overfilled bandwidth of at least 3 GHz-km at a wavelength of 850 nm and an overfilled bandwidth of at least 1.2 GHz-km at one or more wavelengths between 980 and 1060 nm.

Abstract translation: 根据一些实施例，多模光纤包括具有折射率Δ1，最大折射率ΔΔ1MAX和10至40微米的芯半径的渐变折射率玻璃芯; 以及包围折射率Δ4的包围芯的包层区域，其中所述光纤表现出过满的带宽在850nm的波长处表现出至少3GHz-km的过满的带宽，并且在一个或多个具有至少1.2GHz-km的过满的带宽 波长在980和1060 nm之间。

公开(公告)号：US20150331181A1

公开(公告)日：2015-11-19

申请号：US14703225

申请日：2015-05-04

Applicant: Corning Incorporated

Inventor： Xin Chen ,  Ming-Jun Li

IPC: G02B6/028 ,  G02B6/02

Abstract: A multimode optical fiber comprising: a core with a diameter D40 and a refractive index profile configured to optimally transmit light at a wavelength λ1=850 nm and to propagate LP01 mode at another wavelength λo, where λo>950 nm, the multimode fiber has a LP01 mode field diameter LP01MFDMMλ0 and 8.5 μm

Abstract translation: 一种多模光纤，包括：具有直径D40的芯和折射率分布，其折射率分布被配置为最佳地透射波长λ1= 850nm的光，并且在λo> 950nm的另一波长λo处传播LP01模，多模光纤具有 LP01模场直径LP01MFDMMλ0和8.5μm

公开(公告)号：US20150086161A1

公开(公告)日：2015-03-26

申请号：US14488558

申请日：2014-09-17

Applicant: CORNING INCORPORATED

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

IPC: G02B6/42 ,  G02B6/028

CPC classification number: G02B6/0288 ,  G02B6/02247 ,  G02B6/268

Abstract: An optical fiber link that utilizes concatenated primary and compensating multimode optical fibers is disclosed. The primary optical fiber has a first relative refractive index profile with a first alpha value α40 of about 2.1 that provides for a minimum amount of intermodal dispersion of guided modes at a peak wavelength λP40 in the range from 840 nm to 860 nm, and has a first bandwidth BW40 of 2 GHz·km or greater. The compensating optical fiber has a second relative refractive index profile with a second alpha value α60, and wherein −0.9≦(α60−α40)≦−0.1, and a peak wavelength λP60 greater than 880 nm. The optical fiber link has improved bandwidth and data rates for first and second optical signals within first and second wavelength ranges, respectively.

Abstract translation: 公开了一种利用连接的初级和补偿多模光纤的光纤链路。 主光纤具有第一相对折射率分布，其第一α值α40为约2.1，其提供在840nm至860nm范围内的峰值波长λP40处的导模的最小量的多式联运色散，并且具有 2GHz·km以上的第一带宽BW40。 补偿光纤具有第二相对折射率分布，其具有第二α值α60，并且其中-0.9≤n1E（α60-α40）＆lt; 1E-0.1，峰值波长λP60大于880nm。 光纤链路分别改善了在第一和第二波长范围内的第一和第二光信号的带宽和数据速率。