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公开(公告)号:JPH08320419A
公开(公告)日:1996-12-03
申请号:JP11433296
申请日:1996-04-12
Applicant: CORNING INC
Inventor: BERKEY GEORGE E , BHAGAVATULA VENKATA A , JONES PETER C , KECK DONALD B , LIU YANMING , MODAVIS ROBERT A , MORROW ALAN J , NEWHOUSE MARK A , NOLAN DANIEL A
IPC: G02B6/00 , C03B37/012 , C03B37/014 , C03B37/018 , C03B37/02 , C03B37/027 , G02B6/02 , G02B6/028 , G02B6/036 , G02B6/10 , G02B6/18 , G02B6/22
Abstract: PROBLEM TO BE SOLVED: To provide a single mode light waveguide fiber designed to restrict a power penalty due to four optics mixtures and a manufacturing method of that waveguide. SOLUTION: A characteristic change such as radius (diameter 83, 84) or refractive index, for example, of a waveguide fiber core gives all divergence along the length of a waveguide. An algebraic summation of multiples of the length and all divergence is controlled to a pre-selected value toward each waveguide constituting a system link. When the size and the small length part of the change of all divergence is properly selected, a system link with which a signal advances by a short distance in a waveguide part having all divergence close to zero is obtained. However, the change of all divergence gives the system link generating a distributed effect pre-selected for the signals in the wavelength range pre-selected. The distributed effect against the signals can be selected to be substantially zero. A veriety of techniques for manufacture of DM fibers is disclosed.
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公开(公告)号:WO9739368A2
公开(公告)日:1997-10-23
申请号:PCT/US9706002
申请日:1997-04-11
Applicant: CORNING INC , KECK DONALD B , MILLER WILLIAM J , MODAVIS ROBERT A , NOLAN DANIEL A
Inventor: KECK DONALD B , MILLER WILLIAM J , MODAVIS ROBERT A , NOLAN DANIEL A
CPC classification number: G02B6/29352
Abstract: A Mach-Zehnder filter is provided with a strongly aperiodic transfer function including a broad, sharply defined passband. The filter can be used in conjunction with optical amplifiers.
Abstract translation: Mach-Zehnder滤波器具有非常强的非周期性传递函数,包括一个宽而清晰的通带。 滤波器可以与光放大器配合使用。
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公开(公告)号:AU693329B2
公开(公告)日:1998-06-25
申请号:AU5046196
申请日:1996-04-03
Applicant: CORNING INC
Inventor: BERKEY GEORGE E , BHAGAVATULA VENKATA A , JONES PETER C , KECK DONALD B , LIU YANMING , MODAVIS ROBERT A , MORROW ALAN J , NEWHOUSE MARK A , NOLAN DANIEL A
IPC: G02B6/00 , C03B37/012 , C03B37/014 , C03B37/018 , C03B37/02 , C03B37/027 , G02B6/02 , G02B6/028 , G02B6/036 , G02B6/18
Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.
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公开(公告)号:CA1274983A
公开(公告)日:1990-10-09
申请号:CA512883
申请日:1986-07-02
Applicant: CORNING INC
Inventor: KECK DONALD B
IPC: G02B6/28 , C03B37/014 , C03B37/028 , G02B6/26 , C03B23/20 , C03B23/207
Abstract: A low loss fiber optic coupler is fabricated by forming a coupler preform having a plurality of spaced glass cores extending longitudinally through a matrix of glass having a refractive index lower than that of the cores. The coupler preform is heated and stretched by first pulling means to form a glass rod which is drawn by second pulling means past an intermittant source of localized heat. When the localized heat source is turned on, the second pulling means draws the rod downwardly at a rate faster than the first pulling means. Since the rod is softened by the localized heat source, a necked-down coupling region is formed. The rod is severed to form a plurality of coupler units. When an end of a unit is immersed in acid, the matrix glass dissolves, thereby leaving the unit cores and surrounding etch-resistant cladding glass protruding from the newly formed endface of the unit.
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公开(公告)号:DK0737873T3
公开(公告)日:2002-10-21
申请号:DK96105573
申请日:1996-04-09
Applicant: CORNING INC
Inventor: BERKEY GEORGE E , JONES PETER C , LIU YANMING , MODAVIS ROBERT A , NEWHOUSE MARK A , BHAGAVATULA VENKATA A , KECK DONALD B , MORROW ALAN J , NOLAN DANIEL A
IPC: C03B37/012 , G02B6/00 , C03B37/014 , C03B37/018 , C03B37/02 , C03B37/027 , G02B6/02 , G02B6/028 , G02B6/036 , G02B6/16
Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.
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公开(公告)号:DE69621974D1
公开(公告)日:2002-08-01
申请号:DE69621974
申请日:1996-04-09
Applicant: CORNING INC
Inventor: BERKEY GEORGE E , BHAGAVATULA VENKATA A , JONES PETER C , KECK DONALD B , LIU YANMING , MODAVIS ROBERT A , MORROW ALAN J , NEWHOUSE MARK A , NOLAN DANIEL A
IPC: C03B37/012 , G02B6/00 , C03B37/014 , C03B37/018 , C03B37/02 , C03B37/027 , G02B6/02 , G02B6/028 , G02B6/036 , G02B6/16
Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.
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公开(公告)号:AU2118197A
公开(公告)日:1997-09-02
申请号:AU2118197
申请日:1997-02-04
Applicant: CORNING INC
Inventor: KECK DONALD B , MODAVIS ROBERT A
Abstract: Fiber Bragg gratings of low reflectivity are given a squared reflectivity function in the form of a tophat configuration having a flat top and lacking undesirable side lobes. Such a reflectivity function for a fiber Bragg grating is achieved by interfering a diffracted beam with a plane wavefront beam so as to impose a sinc function on the resulting interference pattern that imprints the grating on an optical fiber.
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公开(公告)号:CA2216724A1
公开(公告)日:1996-12-19
申请号:CA2216724
申请日:1996-05-23
Applicant: CORNING INC
Inventor: KECK DONALD B , EVANS ALAN F
Abstract: A combination of dispersion flattened single mode optical waveguide fiber (14) a nd soliton signal pulses (18, 20) yields an optimum telecommunication system capacity. The dispersion flattenend fiber (14) serves t o relax tolerances on soliton center wavelength and intensity. In addition, the inventive combination facilitates the design and use of long ha ul systems using optical amplifiers (16).
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公开(公告)号:CA2174055A1
公开(公告)日:1996-10-14
申请号:CA2174055
申请日:1996-04-12
Applicant: CORNING INC
Inventor: BERKEY GEORGE E , BHAGAVATULA VENKATA A , JONES PETER C , KECK DONALD B , LIU YANMING , MODAVIS ROBERT A , MORROW ALAN J , NEWHOUSE MARK A , NOLAN DANIEL A
IPC: G02B6/00 , C03B37/012 , C03B37/014 , C03B37/018 , C03B37/02 , C03B37/027 , G02B6/02 , G02B6/028 , G02B6/036 , G02B6/18
Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.
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公开(公告)号:CA2313146A1
公开(公告)日:1999-07-22
申请号:CA2313146
申请日:1999-01-07
Applicant: CORNING INC
Inventor: KECK DONALD B , NOLAN DANIEL A
Abstract: An N-port optical wavelength division multiplexer (10) and demultiplexer includes two evanescent wave couplers (30, 70) connected by N optical paths (110, 112, 114, 116, 11N). Each of the optical paths includes wavelengthselecting elements (50, 52, 54, 56) that are used to select specific wavelengths of light. Light signals composed of N wavelengths of light introduced to an exterior port in one of the couplers are split substantially equally among all the optical paths within the coupler, so that each optical path exiting the coupler includes light of all the wavelengths initially introduced to the coupler. The wavelength selecting elements disposed on each optical path are situated to direct the light in a manner such that light of only the selected wavelengths interferes constructively at a given exterior coupler port and other wavelengths interfere destructively.
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