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公开(公告)号：HU0002812A2
公开(公告)日：2001-01-29
申请号：HU0002812
申请日：1997-06-27
Applicant: CORNING INC
Inventor： MURPHY JAMES P , SMITH DAVID K
Abstract: Improved optical waveguide fiber (1) comprised of a central core (10) region surrounded by inner clad region (12). The second annular region (14) is doped with tantalum. The core (10) is doped with germanium. The first annular region (20) located between two adjacent regions of relatively high indexes of refraction. The index of refraction of both adjoining regions (10, 20) is greater than the central region (20).
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公开(公告)号：CA2343362A1
公开(公告)日：2000-04-06
申请号：CA2343362
申请日：1999-08-31
Applicant: CORNING INC
Inventor： MA DAIPING , SMITH DAVID K
Abstract: Disclosed is a single mode optical waveguide having a segmented core of at least two segments. The relative refractive index, the index profile and the radial dimensions of the core segments are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1570 nm. Embodiments of the invention having two, three and four segments are described. To eliminate non-linear effects, such as FWM and SPM, which occur in a high performance, high rate systems, the effective area of the waveguide is made to be greater than about 60 .mu.m2, more preferably greate r than 65 .mu.m2, and most preferably greater than 70 .mu.m2. The total dispersion is preferably positive and equal to at least 2 ps/nm-km at 1530 n m. This total dispersion together with a total dispersion slope less than about 0.1 ps/nm2-km insures a minimum FWM effect over the wavelength window.
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公开(公告)号：BR9802045A
公开(公告)日：1999-10-19
申请号：BR9802045
申请日：1998-06-22
Applicant: CORNING INC
Inventor： SMITH DAVID K
Abstract: Disclosed is a single mode optical waveguide fiber designed for use in high performance telecommunication systems. The novel segmented core profile design improves bending performance to provide enhanced resistance to adverse environments. Total dispersion over an extended wavelength window is maintained low by placing the zero dispersion wavelength above the upper limit of the operating window. In addition, cut off wavelength is increased to just below the operating window. Ease of manufacture is retained as is very low waveguide attenuation.
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公开(公告)号：CA2305232A1
公开(公告)日：1999-05-27
申请号：CA2305232
申请日：1998-10-15
Applicant: CORNING INC
Inventor： LIU YANMING , MA DAIPING , LI MING-JUN , SMITH DAVID K
Abstract: Disclosed is a single mode optical waveguide fiber having a segmented core design. In particular, the core comprises three segments (2, 6, 8), 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 .mu.m2. The profile is further defined by the inner and outer profile volume and the ratio of outer to inner volume. Thus, inner volume is in the range 2.28 to 3.26 % .mu.m2, the outer profile volume is in the range 3.70 to 13.75 % .mu.m2, and the ratio of outer to inner volume is in the range 1.5 to 4.3.
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公开(公告)号：CA2109389A1
公开(公告)日：1994-07-01
申请号：CA2109389
申请日：1993-10-27
Applicant: CORNING INC
Inventor： ANTOS ANTHONY J , SMITH DAVID K
Abstract: An optical waveguide fiber with improved bend loss performance while maintaining cutoff wavelength, .lambda.c, and zero dispersion wavelength, .lambda.o, in practical operating ranges. The fiber includes an inner core region with a refractive index delta higher than the rest of the core and a reduced diffusion tail at the core/cladding interface. Optionally, a ring at the outer portion of the core is provided to compensate for increased .lambda.o which results from the higher inner core refractive index delta. This ring also contributes to the reduced diffusion tail at the core/cladding interface.
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Patent Agency Ranking
公开(公告)号：CA2084217A1
公开(公告)日：1993-08-05
申请号：CA2084217
申请日：1992-12-01
Applicant: CORNING INC
Inventor： ANTOS ANTHONY J , BLANKENSHIP MICHAEL G , HALL DOUGLAS W , MURPHY EDWARD F , SMITH DAVID K
Abstract: Disclosed is a family of dispersion compensating optical fibers that are adapted for use with conventional single-mode transmission fibers that are optimized for zero dispersion operation at a wavelength in the range from 1290 nm to 1330 nm to form a transmission link suitable for low dispersion operation in the 1520-1565 nm wavelength window. The dispersion compensating fibers are capable of providing a dispersion more negative than -20 ps/nm-km and attenuation less than 1 dB/km at wavelengths in the 1520-1565 nm region. Certain of the dispersion compensating fibers also exhibit a dispersion versus wavelength relationship having a negative slope in the 1520-1565 nm region, to compensate for the dispersion versus wavelength slope of the trandsmission fiber. The dispersion compensating fiber can be advantageously combined with a fiber amplifier to form a compensator that is adapted to overcome attenuation introduced into the system by the dispersion compensating fiber. In one embodiment, the dispersion compensating fiber is also a distributed fiber amplifier.
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公开(公告)号：ZA200202452B
公开(公告)日：2002-12-24
申请号：ZA200202452
申请日：2002-03-27
Applicant: CORNING INC
Inventor： HERRING JAMES B , SMITH DAVID K
Abstract: Disclosed is a segmented core optical waveguide fiber having low total dispersion slope and negative total dispersion over an extended wavelength window. A wavelength window of particular interest is that in the range of about 1500 nm to 1600 nm. The waveguide fibers in accordance with the invention also have cabled cut off wavelength below about 1480 nm and attenuation at 1550 nm of less than 0.22 dB/km. Mode field diameter is maintained essentially at the nominal value for dispersion shifted waveguide fiber, i.e., 7.7 mum to 8.7 mum. Embodiments having a center segment and a first and a second annular segment are discussed in detail.
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公开(公告)号：AU742132B2
公开(公告)日：2001-12-20
申请号：AU7195998
申请日：1998-06-19
Applicant: CORNING INC
Inventor： SMITH DAVID K
Abstract: Disclosed is a single mode optical waveguide fiber designed for use in high performance telecommunication systems. The novel segmented core profile design improves bending performance to provide enhanced resistance to adverse environments. Total dispersion over an extended wavelength window is maintained low by placing the zero dispersion wavelength above the upper limit of the operating window. In addition, cut off wavelength is increased to just below the operating window. Ease of manufacture is retained as is very low waveguide attenuation.
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公开(公告)号：AU1346301A
公开(公告)日：2001-06-04
申请号：AU1346301
申请日：2000-10-26
Applicant: CORNING INC
Inventor： HERRING JAMES B , SMITH DAVID K
Abstract: Disclosed is a segmented core optical waveguide fiber having low total dispersion slope and negative total dispersion over an extended wavelength window. A wavelength window of particular interest is that in the range of about 1500 nm to 1600 nm. The waveguide fibers in accordance with the invention also have cabled cut off wavelength below about 1480 nm and attenuation at 1550 nm of less than 0.22 dB/km. Mode field diameter is maintained essentially at the nominal value for dispersion shifted waveguide fiber, i.e., 7.7 mum to 8.7 mum. Embodiments having a center segment and a first and a second annular segment are discussed in detail.
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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
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 .
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