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1. 发明授权

US5754720A Low loss fiber optic coupler and method 失效
标题翻译：低损耗光纤耦合器和方法
公开(公告)号：US5754720A
公开(公告)日：1998-05-19
申请号：US635038
申请日：1996-04-17
申请人： Richard A. Quinn , Christopher D. Robson , Latha I. Swaroop , David L. Weidman
发明人： Richard A. Quinn , Christopher D. Robson , Latha I. Swaroop , David L. Weidman
IPC分类号： G02B6/28 , G02B6/26 , G02B6/42
CPC分类号： G02B6/2835 , G02B6/2856
摘要： A method of making 1.times.2 or 2.times.2 overclad couplers, switches and the like such that the process is more reproducible and loss characteristics are improved. Such couplers are typically made by inserting the stripped portions of two active optical fibers into a tube, heating the tube midregion to collapse it onto the fibers and stretching the central portion of the collapsed midregion to achieve the desired coupling characteristics. The improvement involves the insertion of one or two spacer fibers into the tube bore along with the active fibers to take up empty space that had been present in tube bore and to prevent an active fiber from sagging and crossing over the other fiber when the tube is heated during the tube collapse step.
摘要翻译：制造1x2或2x2外包耦合器，开关等的方法，使得该过程更可再现并且损耗特性得到改善。这种耦合器通常通过将两个活性光纤的剥离部分插入管中来制造，加热管中区以将其折叠到纤维上并拉伸折叠的中间区域的中心部分以实现期望的耦合特性。改进之处在于将一个或两个间隔纤维与活性纤维一起插入到管孔中，以占据管孔中存在的空白空间，并且当管是管中时，防止活性纤维下垂并跨越另一纤维在管塌陷步骤期间加热。

2. 发明授权

US5305404A Fiber optic coupler 失效
标题翻译：光纤耦合器
公开(公告)号：US5305404A
公开(公告)日：1994-04-19
申请号：US75665
申请日：1993-06-11
申请人： Christopher D. Robson
发明人： Christopher D. Robson
IPC分类号： G02B6/28 , E02B6/26
CPC分类号： G02B6/2835
摘要： A fiber optic coupler is formed by providing a glass tube having a longitudinal bore and first and second funnels connecting the bore to the ends of the tube. The protective coating is stripped from the central portion of two optical fibers. The first and second fibers are threaded into the tube bore until the uncoated portions thereof are located within the bore. The protective coating of only one of the fibers extends into the first end of the bore, and the protective coating of only one of the fibers extends into the second end of the bore. The fibers extend beyond the tube ends. The bore diameter is just slightly larger than the sum of the diameter of the first fiber and the diameter of the coating of the second fiber. The resultant tight fit of the fibers in the tube promotes the retention the fibers in parallel alignment during the subsequent tube collapse step. The midregion of the tube is heated, collapsed about the fibers, and drawn to form a coupling region.
摘要翻译：通过提供具有纵向孔的玻璃管和将孔连接到管的端部的第一和第二漏斗形成光纤耦合器。保护涂层从两根光纤的中心部分剥离。第一和第二纤维被拧入管孔中，直到其未涂覆的部分位于孔内。仅一个纤维的保护涂层延伸到孔的第一端，并且仅一个纤维的保护涂层延伸到孔的第二端。纤维延伸超过管端。孔径稍大于第一纤维的直径和第二纤维的涂层的直径之和。纤维在管中的紧密配合促进了纤维在随后的管塌缩步骤期间保持平行对准。管的中间区被加热，围绕纤维折叠，并被拉伸以形成耦合区域。

3. 发明授权

US5240489A Method of making a fiber optic coupler 失效
标题翻译：制造光纤耦合器的方法
公开(公告)号：US5240489A
公开(公告)日：1993-08-31
申请号：US944193
申请日：1992-09-11
申请人： Christopher D. Robson
发明人： Christopher D. Robson
IPC分类号： G02B6/28
CPC分类号： G02B6/2835
摘要： A fiber optic coupler is formed by providing a glass tube having a longitudinal bore and first and second funnels connecting the bore to the ends of the tube. The protective coating is stripped from the central portion of two optical fibers. The first and second fibers are threaded into the tube bore until the uncoated portions thereof are located within the bore. The protective coating of only one of the fibers extends into the first end of the bore, and the protective coating or only one of the fibers extends into the second end of the bore. The fibers extend beyond the tube ends. The bore diameter is just slightly larger than the sum of the diameter of the first fiber and the diameter of the coating of the second fiber. The resultant tight fit of the fibers in the tube promotes the retention the fibers in parallel alignment during the subsequent tube collapse step. The midregion of the tube is heated, collapsed about the fibers, and drawn to form a coupling region.

4. 发明授权

US06694075B1 Apodization of optical filters with multiple exposures of photosensitive media 失效
标题翻译：具有多次光敏介质曝光的光学滤光器的变迹
公开(公告)号：US06694075B1
公开(公告)日：2004-02-17
申请号：US09340481
申请日：1999-06-30
申请人： Vikram Bhatia , Thomas A. Cook , Robert A. Modavis , Christopher D. Robson
发明人： Vikram Bhatia , Thomas A. Cook , Robert A. Modavis , Christopher D. Robson
IPC分类号： G02B634
CPC分类号： G02B6/02133 , G02B6/02085 , G02B6/02123
摘要： Filter gratings are formed in optical waveguides having photosensitive cores by exposing the cores to actinic radiation in the form of interfering beams having peak intensities that are relatively displaced along an optical axis 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.
摘要翻译：滤光器光栅形成在具有感光芯的光波导中，其通过使核心以具有峰值强度的波束形式的光化辐射的形式，沿着波导的光轴相对移位。每个干涉光束具有单裂纹强度分布和在两个相对位移的光束之间实现期望条纹对比度所需的空间相干度。感光芯中的折射率调制与辐射的照明（干涉）图案相匹配。干涉光束的相对位移通过调整折射率调制的平均折射率来减小光栅的光谱响应的旁瓣。使用两个光束但没有光束干涉效应的第二次曝光进一步降低了平均折射率。

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