公开(公告)号：BR112012005478A2

公开(公告)日：2016-04-19

申请号：BR112012005478

申请日：2010-09-02

Applicant: CORNING INC

Inventor： BOOKBINDER DANA C ,  LI MING-JUN ,  TANDON PUSHKAR

IPC: G02B6/036

公开(公告)号：CA2920157A1

公开(公告)日：2014-02-13

申请号：CA2920157

申请日：2013-08-01

Applicant: CORNING INC

Inventor： HOOVER BRETT JASON ,  LI MING-JUN ,  LI SHENPING

IPC: G01J5/08 ,  G01D5/353 ,  G01K11/32 ,  G02B6/02

Abstract: A two-core optical fiber is provided for use in Brillouin distributed fiber sensor applications and systems. The two-core fiber includes a first and second core. Each core is configured to exhibit a Brillouin frequency shift greater than 30 Mhz relative to the other core. Further, each core possesses temperature and strain coefficients that differ from the other core. The cores can be configured to produce Brillouin frequency shift levels of at least 30 Mhz relative to one another. These differences in shift levels may be effected by adjustment of the material compositions, doping concentrations and/or refractive index profiles of each of the cores. These optical fibers may also be used in BOTDR- and BOTDA based sensor systems and arrangements.

公开(公告)号：DE602008000977D1

公开(公告)日：2010-05-20

申请号：DE602008000977

申请日：2008-02-26

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  LI MING-JUN ,  LI SHENPING ,  NOLAN DANIEL A

IPC: G02F1/35

Abstract: An optical-fiber-based light source that generates light via third-harmonic (TH) generation is disclosed. The light source includes a pump light source that provides pump light having a fundamental mode of wavelength lambda P . The light source also includes an optical fiber optically coupled to the pump light source. The optical fiber's core refractive index profile has (i) a central region with a refractive index value Delta 1 , (ii) a first annular region immediately surrounding the central region and having a refractive index value Delta 2 , and (iii) a second annular region immediately surrounding the first annular region and having a refractive index value Delta 3 . The optical fiber satisfies the conditions Delta 2 1 and Delta 2 3 , and max{Delta 1 ,Delta 3 }-Delta 2 >1.2%. The pump light produces TH-generated light having a higher-order mode of wavelength lambda TH =(1/3)lambda P and that is outputted at the optical fiber output end. The pump light fundamental mode overlaps the TH-generated-light higher order mode over the length of the optical fiber to provide a conversion efficiency of 1% or greater.

公开(公告)号：AT345512T

公开(公告)日：2006-12-15

申请号：AT99306112

申请日：1999-08-02

Applicant: CORNING INC

Inventor： LI MING-JUN ,  STONE JEFFERY SCOTT

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

公开(公告)号：AU2004307401A1

公开(公告)日：2005-05-12

申请号：AU2004307401

申请日：2004-10-07

Applicant: CORNING INC

Inventor： ZENTENO LUIS A ,  NOLAN DANIEL A ,  WALTON DONNELL T ,  LI MING-JUN ,  BERKEY GEORGE E

IPC: H01S3/067 ,  C03B37/012 ,  C03B37/027 ,  G02B6/02 ,  G02B6/028 ,  G02B6/10 ,  H01S3/063

Abstract: A method for generating a linear single-polarization output beam comprises providing an optically active linearly birefringent and linearly dichroic fiber for propagating light and having a single polarization wavelength range and a gain bandwidth; optically pumping the optically active linearly birefringent and linearly dichroic fiber for obtaining fluorescence within the gain bandwidth; and aligning the single-polarization wavelength range to overlap a desired spectral region of the gain profile.

公开(公告)号：BR9912650A

公开(公告)日：2001-05-02

申请号：BR9912650

申请日：1999-07-22

Applicant: CORNING INC

Inventor： LI MING-JUN ,  STONE JEFFERY SCOTT

IPC: G02B6/036 ,  G02B6/02

Abstract: Disclosed is a single mode optical waveguide fiber having a segmented core. The relative indexes, the refractive index profiles and the radii of the segments are chosen to provide waveguide fiber properties advantageously used in severe environments, such as, undersea cables. The segmented core waveguide fiber has a negative total dispersion over the operating window of about 1530 nm to 1570 nm, which serves to eliminate soliton formation. The key properties of dispersion zero, cut off wavelength, attenuation, and bend resistance fall within desired ranges. The waveguide also features a low polarization mode dispersion.

公开(公告)号：ID27802A

公开(公告)日：2001-04-26

申请号：ID20001120

申请日：1998-10-15

Applicant: CORNING INC

Inventor： LI MING-JUN ,  MA DAIPING ,  SMITH DAVID K ,  LIU YANMING

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/22 ,  G02B6/16

Abstract: Disclosed is a single made optical waveguide fiber having a segmented core design. In particular, the core comprises three segments, each having characteristic dimensions and refractive index profile. By proper choice of index profile in each segment, a waveguide fiber is made which has a mode field diameter of about 9.5, low, positive total dispersion over the operating window 1530 nm to 1565 nm as well as effective area greater than 60 mum 2 .

公开(公告)号：CA2371087A1

公开(公告)日：2000-11-02

申请号：CA2371087

申请日：2000-03-23

Applicant: CORNING INC

Inventor： LI MING-JUN

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/22 ,  G02B6/16

Abstract: Disclosed is a single mode optical waveguide fiber having a relatively large effective area and good bend resistance. The waveguide fiber is characterize d by a segmented core having a central segment (30) and at least one annular segment (32, 34, 36) surrounding the central segment. At least one segment h as a negative relative refractive index where the reference refractive index is taken as the index of the cladding. The total dispersion of the fiber is positive for wavelengths above about 1500 nm, dispersion slope is typically less than about 0.08 ps/nm2-km, and induced attenuation under pin array bend testing is typically less than 5 dB/km.

公开(公告)号：CA2367275A1

公开(公告)日：2000-09-21

申请号：CA2367275

申请日：2000-03-07

Applicant: CORNING INC

Inventor： LI MING-JUN

IPC: G02B6/032 ,  G02B6/036 ,  G02B6/20 ,  G02B6/22

Abstract: Disclosed is a single mode optical waveguide fiber having a segmented core i n which the central segment is a void (16). The shape and radial extent of the core segments are selected to provide a low dispersion slope together with large effective area and good bend resistance. Embodiments of the refractive index profiles in accord with the invention are shown having two or three annular segments (2, 6, 8) surrounding the central void. The presence of the void provides the benefits of a negative relative index located centrally in the core region without the process difficulties associated with the use of dopants that decrease the refractive index of the waveguide fiber.

公开(公告)号：CA2337013A1

公开(公告)日：2000-01-27

申请号：CA2337013

申请日：1999-06-21

Applicant: CORNING INC

Inventor： CHU POLLY W ,  CAIN MICHAEL B ,  LI MING-JUN ,  GROCHOCINSKI JAMES M

IPC: G02B6/036 ,  G02B6/22

Abstract: A single mode optical waveguide fiber having a refractive index profile comprising not less than four segments (16, 18, 20, 22) provides waveguide properties well suited to undersea or other long haul telecommunications systems. The novel refractive index profile is characterized by a core segme nt having a negative relative index, in which, the reference index is that of silica. Another feature of the invention is a cladding layer which contains refractive index increasing dopant at least in the cladding portion adjacent the outermost core segment.