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1. 发明公开

EP0817981A4 METHOD OF WRITING PHOTOSENSITIVE GRATING USING LLOYD'S MIRROR 失效
标题翻译： VERFAHREN ZUM SCHREIBEN VON PHOTOEMPFINDLICHEM GITTER UNTER VERWENDUNG EINES LLOYDSCHEN SPIEGELS
公开(公告)号：EP0817981A4
公开(公告)日：2001-01-17
申请号：EP97923399
申请日：1997-01-17
申请人： CORNING INC
发明人： COOK THOMAS A , MODAVIS ROBERT A
IPC分类号： G02B6/13 , C03B37/023 , G02B5/18 , G02B6/02 , G02B6/10 , G02B6/34 , G02F1/225 , G02B6/16
CPC分类号： G02B6/02133
摘要： 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).
摘要翻译：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。

2. 发明公开

EP1092165A4 APODIZATION OF OPTICAL FILTERS FORMED IN PHOTOSENSITIVE MEDIA 审中-公开
标题翻译：照片的敏感介质变迹由光学过滤器
公开(公告)号：EP1092165A4
公开(公告)日：2005-06-22
申请号：EP99932157
申请日：1999-06-30
申请人： CORNING INC
发明人： BHATIA VIKRAM , COOK THOMAS A , MODAVIS ROBERT A , ROBSON CHRISTOPHER D
IPC分类号： G02B6/13 , G02B5/18 , G02B6/02 , G02B6/122 , G02B6/34 , G02B27/58
CPC分类号： G02B6/02133 , G02B6/02085 , G02B6/02138 , G02B6/29347 , G02B27/58
摘要： 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.

3. 发明公开

EP0866990A4 TUNABLE OPTICAL COUPLER USING PHOTOSENSITIVE GLASS 失效
标题翻译： WITH感光性玻璃可调谐光学COUPLER
公开(公告)号：EP0866990A4
公开(公告)日：2000-11-02
申请号：EP96944334
申请日：1996-12-06
申请人： CORNING INC
发明人： COOK THOMAS A , MODAVIS ROBERT A
IPC分类号： G02B6/122 , G02B6/24 , G02B6/28 , G02B6/18 , G02B6/293
CPC分类号： G02B6/283 , G02B6/243 , G02B6/2835 , G02B6/2856
摘要： 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.

4. 发明公开

EP0865621A4 VARIABLE PERIOD AMPLITUDE GRATING MASK AND METHOD FOR USE 失效
标题翻译：面具用句VERANDERLICHER，幅度和它们的使用方法GRID
公开(公告)号：EP0865621A4
公开(公告)日：1999-05-12
申请号：EP97936316
申请日：1997-07-29
申请人： CORNING INC
发明人： COOK THOMAS A , MODAVIS ROBERT A
IPC分类号： G02B6/34 , G02B5/18 , G02B6/02 , G02B6/10 , G02F1/225
CPC分类号： G02B6/02152 , G02B6/02138 , G02B6/02142
摘要： 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.

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