公开(公告)号：EP0817981A4

公开(公告)日：2001-01-17

申请号：EP97923399

申请日：1997-01-17

Applicant: CORNING INC

Inventor： COOK THOMAS A ,  MODAVIS ROBERT A

IPC: G02B6/13 ,  C03B37/023 ,  G02B5/18 ,  G02B6/02 ,  G02B6/10 ,  G02B6/34 ,  G02F1/225 ,  G02B6/16

CPC classification number: G02B6/02133

Abstract: Apparatus for forming a refractive index grating in a waveguide (10) in accordance with the invention includes a waveguide (10) formed from a material that changes its index of refraction when exposed to a beam of optical radiation (20), a source of coherent optical radiation for forming a beam of radiation, a mirror (12) arranged to intercept a first part of a beam and to reflect the first part of the beam through an angle, and a phase delay plate (22) arranged to intercept a second part of the beam for delaying the second part of the beam propagating through the plate, in which the mirror (12) and the phase delay plate (22) are arranged so that the first part of the beam and the second delayed part of the beam form an interference pattern on the waveguide for changing the index of refraction of the waveguide, in a pattern corresponding to the interference pattern for forming an index grating in the waveguide (10).

Abstract translation: 根据本发明的用于在波导中形成折射率光栅的装置包括由暴露于光辐射束时改变其折射率的材料形成的波导，用于形成辐射束的相干光辐射源， 镜子，被布置成拦截光束的第一部分并且将光束的第一部分反射一角度;相位延迟板，被布置成拦截光束的第二部分，以延迟传播通过光盘的光束的第二部分 ，其中反射镜和相位延迟板被布置成使得波束的第一部分和波束的第二延迟部分在波导上形成干涉图案以改变波导的折射率，对应于 用于在波导中形成折射率光栅的干涉图案。

公开(公告)号：EP0883827A4

公开(公告)日：1999-04-28

申请号：EP97906505

申请日：1997-02-04

Applicant: CORNING INC

Inventor： KECK DONALD B ,  MODAVIS ROBERT A

IPC: G02B5/18 ,  G02B6/26 ,  G02B6/32 ,  G02B6/34 ,  G02B6/42 ,  G02B27/44

CPC classification number: G02B6/02085 ,  G02B6/02133

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 (12). Such a reflectivity function for a fiber Bragg grating is achieved by interfering a diffracted beam (20) 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 (10).

Abstract translation: 具有低反射率的光纤布拉格光栅以具有平坦顶部并且不具有不期望的旁瓣的托管构造的形式给出平方反射率函数。 通过将衍射光束与平面波前光束进行干涉来实现光纤布拉格光栅的这种反射率功能，以便在将光栅压印在光纤上的所得到的干涉图案上施加sinc函数。

公开(公告)号：EP1092165A4

公开(公告)日：2005-06-22

申请号：EP99932157

申请日：1999-06-30

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  COOK THOMAS A ,  MODAVIS ROBERT A ,  ROBSON CHRISTOPHER D

IPC: G02B6/13 ,  G02B5/18 ,  G02B6/02 ,  G02B6/122 ,  G02B6/34 ,  G02B27/58

CPC classification number: G02B6/02133 ,  G02B6/02085 ,  G02B6/02138 ,  G02B6/29347 ,  G02B27/58

Abstract: Filter gratings are formed in optical waveguides (50) having photosensitive cores by exposing the cores to actinic radiation in the form of interfering beams (38, 40) having peak intensities (72, 74) that are relatively displaced along an optical axis (64) of the waveguides. Each of the interfering beams has a single-lobed intensity profile and a degree of spatial coherence required to achieve a desired fringe contrast between the two relatively displaced beams. Index modulations in the photosensitive core match the illumination (interference) pattern of the radiation. The relative displacement of the interfering beams reduces side lobes of the gratings' spectral responses by leveling the average refractive index of the index modulations. A second exposure with the two beams but without the beams' interference effects further levels the average refractive index.

公开(公告)号：EP0835540A4

公开(公告)日：2000-02-02

申请号：EP97923408

申请日：1997-04-11

Applicant: CORNING INC

Inventor： KECK DONALD B ,  MILLER WILLIAM J ,  MODAVIS ROBERT A ,  NOLAN DANIEL A

IPC: G02B6/287 ,  G02B6/28 ,  G02B6/34 ,  H01S3/00 ,  G02B6/26

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滤波器具有强非周期性的传递函数，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。

公开(公告)号：EP1123520A4

公开(公告)日：2006-04-12

申请号：EP99951828

申请日：1999-10-07

Applicant: CORNING INC

Inventor： BHATIA VIKRAM ,  MODAVIS ROBERT A

IPC: G02B6/122 ,  G02B5/18 ,  G02B6/02 ,  G03F7/20 ,  G02B6/34

CPC classification number: G03F7/70191 ,  G02B6/0208 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/02142 ,  G03F7/7035 ,  G03F7/70408 ,  Y10S359/90

Abstract: Optical gratings having a range of possible Bragg wavelengths can be produced using a single phase mask by exposing the mask to a non-collimated spatially filtered beam of light. A spatial filter (30) removes high spatial frequency components from the beam, and a focusing system (36) directs the filtered beam to a phase mask (40). A rate at which the beam is focused and a spacing between the phase mask and a photo-sensitive waveguide (12) are varied to produce gratings in the waveguide having a range of possible periods.

Abstract translation: 具有可能的布拉格波长范围的光栅可以使用单相掩模通过将掩模曝光到非准直的空间滤光光束来产生。 空间滤波器从波束去除高空间频率分量，并且聚焦系统将滤波的波束引导到相位掩模。 光束被聚焦的速率和相位掩模和光敏波导之间的间距被改变以在波导中产生具有可能周期范围的光栅。

公开(公告)号：EP1212646A4

公开(公告)日：2005-08-31

申请号：EP00950492

申请日：2000-07-21

Applicant: CORNING INC

Inventor： CARBERRY JOEL P ,  CHEN GANG ,  KNOWLES PETER ,  KOHNKE GLENN E ,  MILLER WILLIAM J ,  MODAVIS ROBERT A ,  WELLER-BROPHY LAURA A

IPC: G02B6/00 ,  G02B6/38 ,  G02B6/34 ,  G02B6/16

CPC classification number: G02B6/02209 ,  G02B6/02095 ,  G02B6/02123 ,  G02B6/2558

Abstract: Packages for long period fiber gratings and other optical components (and methods for forming the packages) are described. According to an aspect of the invention, a hollow tube (14) surrounding an optical fiber (12) containing a long-period grating (21) is collapsed in two areas (22), forming a seal at each end of the tube. According to another aspect of the invention, a hollow tube with a shelf section at each end surrounds an optical fiber containing a long-period grating. The hollow tube is sealed at each end with a fused frit. According to another aspect of the invention, a hollow tube surrounding an optical fiber containing grating is sealed at each end with a glass plug.

公开(公告)号：EP0866990A4

公开(公告)日：2000-11-02

申请号：EP96944334

申请日：1996-12-06

Applicant: CORNING INC

Inventor： COOK THOMAS A ,  MODAVIS ROBERT A

IPC: G02B6/122 ,  G02B6/24 ,  G02B6/28 ,  G02B6/18 ,  G02B6/293

CPC classification number: G02B6/283 ,  G02B6/243 ,  G02B6/2835 ,  G02B6/2856

Abstract: An optical coupler (10) has two fibers (20, 30) that are adjacent each other in a coupling region (12). One of the fibers has a clad doped with a photosensitive glass, such as germania. The photosensitive glass is exposed to suitable radiation to alter the index of refraction of fiber and tune the coupler (110) to the selected coupling frequency.

公开(公告)号：EP0865621A4

公开(公告)日：1999-05-12

申请号：EP97936316

申请日：1997-07-29

Applicant: CORNING INC

Inventor： COOK THOMAS A ,  MODAVIS ROBERT A

IPC: G02B6/34 ,  G02B5/18 ,  G02B6/02 ,  G02B6/10 ,  G02F1/225

CPC classification number: G02B6/02152 ,  G02B6/02138 ,  G02B6/02142

Abstract: A variable period amplitude grating mask (10) for use in making a long period Bragg grating is realized by a helically coiled spring (14). Stretching or compressing the spring changes the periodicity of the mask (10). A photosensitive optical waveguide (100), planar or fiber, is positioned within the spring coils (16) along the major axis of the spring (14). Actinic radiation is incident on the masked waveguide, and induces an index of perturbation in the waveguide having the periodicity of the mask. Different spring coil sizes and/or orientation of the waveguide respect to the mask provide linear or nonlinear (chirped) grating periods.