公开(公告)号：US06303182B1

公开(公告)日：2001-10-16

申请号：US09252704

申请日：1999-02-18

Applicant: Benjamin John Eggleton ,  Rebecca Jane Jackman ,  John A. Rogers ,  Thomas A. Strasser

Inventor： Benjamin John Eggleton ,  Rebecca Jane Jackman ,  John A. Rogers ,  Thomas A. Strasser

IPC: C03C2522

CPC classification number: G02B6/02204 ,  C03C25/1063 ,  C03C25/22 ,  G02B6/02 ,  G02B6/02104 ,  G02B6/02123

Abstract: In accordance with the invention, an optical fiber is provided with a metal coating of controlled variable thickness by the steps of disposing the fiber in position for receiving coating metal from a metal source, and depositing metal while moving a shadow mask between the fiber and the source to provide patterning of deposited metal. Advantageously, the mask is translated at a constant velocity perpendicular to the fiber. The method is particularly useful for the fabrication of adjustable Bragg gratings.

Abstract translation: 根据本发明，光纤通过以下步骤设置有可控的可变厚度的金属涂层：将纤维布置在适当位置以从金属源接收涂层金属，并且在光纤和 源提供沉积金属的图案化。 有利地，掩模以垂直于纤维的恒定速度平移。 该方法对于制造可调布拉格光栅特别有用。

公开(公告)号：US5208882A

公开(公告)日：1993-05-04

申请号：US791830

申请日：1991-11-14

Applicant: Thomas A. Strasser ,  Wei Y. Hsu ,  Mool C. Gupta

Inventor： Thomas A. Strasser ,  Wei Y. Hsu ,  Mool C. Gupta

IPC: G02B6/122 ,  G02B6/124 ,  G02B6/34

CPC classification number: G02B6/34 ,  G02B6/124

Abstract: A hybrid, thin-film, optical waveguide structure has a substrate with a grating coupler formed thereon. A thin-film waveguide film is formed on the substrate and has a tapered portion overlaying the grating.

公开(公告)号：US6147788A

公开(公告)日：2000-11-14

申请号：US80551

申请日：1998-05-18

Applicant: Pavel Viktorovich Mamyshev ,  Linn Frederick Mollenauer ,  Thomas A. Strasser

Inventor： Pavel Viktorovich Mamyshev ,  Linn Frederick Mollenauer ,  Thomas A. Strasser

IPC: H04B10/18 ,  H04B10/12

CPC classification number: H04B10/25077

Abstract: In soliton transmission, third order dispersion of the transmission fibers tends to cause unacceptable variation in the filter strength parameter, .eta. over the wide wavelength bands required for massive wavelength division multiplexing (WDM). The effect of dispersion is substantially eliminated by varying the mirror reflectivities R(.lambda.) of etalon filters with wavelength, such that the strength (.eta.) parameter, in soliton units, essentially remains at the optimal value across the entire WDM transmission band.

Abstract translation: 在孤子传输中，传输光纤的三阶色散倾向于在大规模波分复用（WDM）所需的宽波段上的滤波强度参数eta引起不可接受的变化。 通过改变具有波长的标准具滤光器的镜面反射率R（λ），孤立子单元中的强度（eta）参数基本上保持在整个WDM传输频带的最佳值，基本上消除了色散的影响。

公开(公告)号：US5889899A

公开(公告)日：1999-03-30

申请号：US950899

申请日：1997-10-15

Applicant: Charles Howard Henry ,  Christi Kay Madsen ,  Thomas A. Strasser

Inventor： Charles Howard Henry ,  Christi Kay Madsen ,  Thomas A. Strasser

IPC: G01B9/02 ,  G01J9/02 ,  G02B6/12 ,  H04B10/02 ,  H04B10/28 ,  G02F1/295 ,  G02B6/34

CPC classification number: G02B6/12007 ,  G02B2006/12159

Abstract: A Brag reflective Mach-Zehnder filter has arms that introduce a .pi. phase difference in transmission but not in reflection. In one embodiment a .pi. phase difference is introduced in one of the two arms between the Bragg grating and one of the couplers. In another embodiment, a phase difference of .pi./2 is introduced in one arm both before and after the grating and the location of the grating in the other arm is shifted. The transmission of the resulting filter is substantially independent of the degree of coupling at the input and the output. WDM systems employing the new filters are also disclosed.

Abstract translation: 布拉格反射马赫 - 曾德滤镜具有在透射中引入pi相位差但不反射的臂。 在一个实施例中，在布拉格光栅和其中一个耦合器之间的两个臂之一中引入了一个π相位差。 在另一个实施例中，在光栅之前和之后，在一个臂中引入π/ 2的相位差，并且另一个臂中的光栅的位置偏移。 所得到的滤波器的传输基本上与输入和输出处的耦合程度无关。 还公开了采用新型滤波器的WDM系统。

公开(公告)号：US5815518A

公开(公告)日：1998-09-29

申请号：US871023

申请日：1997-06-06

Applicant: William Alfred Reed ,  Andrew John Stentz ,  Thomas A. Strasser

Inventor： William Alfred Reed ,  Andrew John Stentz ,  Thomas A. Strasser

IPC: G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/30 ,  G02B6/34

CPC classification number: H01S3/302 ,  H01S3/0675

Abstract: The conversion efficiency of a cascaded Raman laser (CRL) can be significantly improved if it comprises one or more of the below recited design features. The CRL comprises an intracavity section between an input section and an output section. The CRL is adapted for receiving pump radiation of wavelength .lambda..sub.p, and for emitting output radiation of wavelength .lambda..sub.n >.lambda..sub.p, and each of the input section and output section comprises fiber Bragg gratings of center wavelengths .lambda..sub.1, .lambda..sub.2 . . . .lambda..sub.n, where n.gtoreq.2 and .lambda..sub.1

Abstract translation: 如果级联拉曼激光器（CRL）包括一个或多个下述设计特征，则转换效率可以显着提高。 CRL包括在输入部分和输出部分之间的腔内部分。 CRL适于接收波长λp的泵浦辐射，并且用于发射波长λ>λp的输出辐射，并且每个输入部分和输出部分包括中心波长λ1，λ2的光纤布拉格光栅。 。 。 λn，其中n> / = 2和λ1 <λ2。 。 。 λn-1。 效率增加的特征之一是光纤布拉格光栅的排序，使得在输入部分和输出部分中心波长λ1的光栅。 。 。 λn和λ1。 。 。 λ1-1分别按照中心波长依次布置，中心波长随距离腔内部分的距离增加而增加。 在优选实施例中，输出部分的中心波长λn的光纤布拉格光栅被布置在腔内部分和具有中心波长λ1的光栅之间。其它效率增加特征是输出部分中的λn光栅的选择，使得 它在λ-1光栅下游的输出部分中具有10-25％范围内的反射率，中心波长λp的光栅的布置，至少一些光纤布拉格光栅的选择使得它们的反射率已经满 在0.8-2.0nm范围内的半高宽度，选择光纤布拉格光栅使得连续光栅之间的中心波长间隔对应于11.7-14.9THz范围内的频移，选择指定的光纤折射率分布， 并使用长度在300-1200米范围内的腔内部分。

公开(公告)号：US5812711A

公开(公告)日：1998-09-22

申请号：US791083

申请日：1997-01-29

Applicant: Alastair Malcolm Glass ,  Sungho Jin ,  Paul Joseph Lemaire ,  Thomas A. Strasser

Inventor： Alastair Malcolm Glass ,  Sungho Jin ,  Paul Joseph Lemaire ,  Thomas A. Strasser

IPC: G02B26/08 ,  G02B6/02 ,  G02B6/34 ,  G02B26/00 ,  G02F1/01 ,  H04B10/02 ,  H04B10/28 ,  H04J14/00

CPC classification number: G02B6/29322 ,  G02B6/022 ,  G02B6/29395 ,  G02F1/0115 ,  G02F1/0134 ,  G02B6/2932 ,  G02B6/29383 ,  G02F2201/307

Abstract: In accordance with the invention, a tunable fiber grating comprises a fiber grating secured to a magnetostrictive body so that magnetostrictive strain will be transmitted to the grating. An electromagnet is disposed adjacent the magnetostrictive body for applying a magnetic field along the body. Control of the current applied to the electromagnet permits control of the strain transmitted to the fiber grating, and thus control of the grating spacing and reflection frequency. In a preferred embodiment the magnetostrictive body is cylinder bonded along the grating. In alternative arrangements, the magnetostrictive effect can be mechanically amplified. An add/drop multiplexer employing the tunable gratings is described.

Abstract translation: 根据本发明，可调谐光纤光栅包括固定到磁致伸缩体的光纤光栅，使得磁致伸缩应变将传输到光栅。 电磁体设置在与磁致伸缩体相邻的位置，用于沿着主体施加磁场。 控制施加到电磁体的电流允许控制传输到光纤光栅的应变，从而控制光栅间隔和反射频率。 在优选实施例中，磁致伸缩体沿着光栅圆柱体连接。 在替代布置中，可以机械地放大磁致伸缩效应。 描述了采用可调谐光栅的分插复用器。

公开(公告)号：US5718738A

公开(公告)日：1998-02-17

申请号：US740745

申请日：1996-11-04

Applicant: Glenn Eric Kohnke ,  Thomas A. Strasser

Inventor： Glenn Eric Kohnke ,  Thomas A. Strasser

IPC: G02B5/18 ,  C03B37/00 ,  G02B6/02 ,  G02B6/10

CPC classification number: G02B6/02138 ,  G02B6/02085

Abstract: In accordance with the invention, a continuously chirped fiber Bragg grating is made by fabricating a continuously chirped phase mask and using the mask to write a Bragg grating on a parallel fiber. The chirped phase mask is made by exposing a photoresist-coated mask substrate to two interfering beams: one a collimated beam and the other a beam reflected from a continuously curved mirror. After etching, the resulting phase mask can be used to write a chirped fiber grating having a continuously varying grating period without physical modification of the fiber. The resulting fiber grating has a widened bandwidth and uniform dispersive delay characteristics useful for dispersion compensation in critical telecommunications applications.

Abstract translation: 根据本发明，通过制造连续啁啾的相位掩模并使用掩模在平行光纤上写入布拉格光栅来制造连续啁啾光纤布拉格光栅。 啁啾相位掩模是通过将光致抗蚀剂涂覆的掩模基板暴露于两个干涉光束来制造的：一个是准直光束，另一个是从连续弯曲的反射镜反射的光束。 在蚀刻之后，所得到的相位掩模可用于写入具有连续变化的光栅周期的啁啾光纤光栅，而不对光纤进行物理修改。 所得到的光纤光栅具有加宽的带宽和均匀的色散延迟特性，用于关键电信应用中的色散补偿。

公开(公告)号：US5506925A

公开(公告)日：1996-04-09

申请号：US396023

申请日：1995-02-28

Applicant: Benjamin I. Greene ,  Thomas A. Strasser ,  Cynthia A. Volkert

Inventor： Benjamin I. Greene ,  Thomas A. Strasser ,  Cynthia A. Volkert

IPC: G02B6/13 ,  C03C25/62 ,  G02B6/126 ,  G02B6/10 ,  C03B37/023

CPC classification number: C03C25/62 ,  G02B6/126 ,  G02B2006/12166

Abstract: A method for reducing birefringence in a silicate waveguide structure having a waveguide core and cladding includes the step of selecting an irradiation energy that induces compaction in the cladding. The waveguide structure is then irradiated with radiation having an energy equal to the irradiation energy to induce a reduction in birefringence.

Abstract translation: 在具有波导芯和包层的硅酸盐波导结构中减少双折射的方法包括选择在包层中引起压实的照射能量的步骤。 然后用具有等于照射能量的能量的辐射照射波导结构以引起双折射率的降低。

公开(公告)号：US5258967A

公开(公告)日：1993-11-02

申请号：US840213

申请日：1992-02-24

Applicant: Thomas A. Strasser ,  Mool C. Gupta

Inventor： Thomas A. Strasser ,  Mool C. Gupta

IPC: G11B7/12 ,  G11B7/135 ,  G11B7/09

CPC classification number: G11B7/1353 ,  G11B7/124

Abstract: In the read/write head of an optical storage system, a bi-direction grating coupler is used to replace optical components normally found in the read/write head. The use of the bi-directional grating coupler reduces the bulk and weight of the read/write head. The two channels of the bi-directional grating coupler can be used to separate a radiation component that can used to provide a tracking control signal from a radiation component that can be used to provide a focus control signal. One of the channels is also used to provide the radiation component from which the data on the storage medium can be identified. The bi-directional coupler can be implemented by two grating couplers, each grating coupler having a thin film associated therewith and each grating coupler diverting a selected radiation portion into the associated thin film. The bi-directional grating coupler can be implemented using a single grating with tapered thin film surfaces, the taper separating the selected radiation components into selected portions of the thin film. The tapered thin film surface broadens the wavelength response of the associated grating. In either embodiment, a reflection diffraction grating can be inserted in the optical path to compensate for shifts in the radiation wavelength.

Abstract translation: 在光学存储系统的读/写头中，使用双向光栅耦合器来代替通常在读/写头中发现的光学元件。 双向光栅耦合器的使用降低了读/写头的体积和重量。 双向光栅耦合器的两个通道可用于分离可用于从可用于提供聚焦控制信号的辐射分量提供跟踪控制信号的辐射分量。 其中一个通道还用于提供可以识别存储介质上的数据的辐射分量。 双向耦合器可以由两个光栅耦合器实现，每个光栅耦合器具有与之相关联的薄膜，并且每个光栅耦合器将选定的辐射部分转向相关联的薄膜。 可以使用具有锥形薄膜表面的单个光栅来实现双向光栅耦合器，锥形将所选择的辐射分量分离成薄膜的选定部分。 锥形薄膜表面使相关光栅的波长响应变宽。 在任一实施例中，反射衍射光栅可插入光路中以补偿辐射波长的偏移。

公开(公告)号：US06415079B1

公开(公告)日：2002-07-02

申请号：US09519382

申请日：2000-03-03

Applicant: Geoffrey L. Burdge ,  Benjamin J. Eggleton ,  Thomas A. Strasser ,  Paul S. Westbrook ,  Robert S. Windeler

Inventor： Geoffrey L. Burdge ,  Benjamin J. Eggleton ,  Thomas A. Strasser ,  Paul S. Westbrook ,  Robert S. Windeler

IPC: G02B634

CPC classification number: G02B6/02366 ,  C03B37/0122 ,  C03B2203/10 ,  C03B2203/14 ,  G02B6/021 ,  G02B6/02371 ,  G02B6/29317 ,  G02B6/29394

Abstract: The present invention is predicated on applicants' discovery that an appropriately spaced and dimensioned internal gap cladding can substantially reduce short wavelength cladding mode loss in a fiber Bragg grating. A fiber Bragg grating is provided with a ring of closely spaced, longitudinally extending gap regions in the glass peripherally surrounding the core. The gaps are spaced apart by thin glass webs having a thickness less than a wavelength of the light being transmitted and are disposed peripherally about the core at a distance of 2-10 wavelengths from the core center. The thin webs limit the passage of the light between the gaps. The combination of webs and gaps acts as an internal thin cladding which supports fewer cladding modes than conventional glass cladding and, significantly, provides increased wavelength spacing between the Bragg resonance and the first cladding mode resonance.

Abstract translation: 本发明基于申请人的发现，适当间隔和尺寸尺寸的内部间隙包层可以显着地减少光纤布拉格光栅中的短波长包层模式损耗。 光纤布拉格光栅在玻璃周围包围核心处设置有紧密间隔开的纵向延伸的间隙区域的环。 间隙被薄玻璃纤维网间隔开，薄板玻璃纤维网的厚度小于正在透射的光的波长，并且围绕芯离心设置在与核心中心相距2-10个波长的位置。 薄腹板限制了间隙之间的光通过。 腹板和间隙的组合用作内部薄包层，其支撑比常规玻璃包层更少的包层模式，并且显着地在布拉格共振和第一包层模式共振之间提供增加的波长间隔。