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38 条记录 (耗时 0.026 秒)

    Method and apparatus for providing dispersion compensation
    2.
    发明授权
    Method and apparatus for providing dispersion compensation 有权
    提供色散补偿的方法和装置

    公开(公告)号：US06724956B2

    公开(公告)日：2004-04-20

    申请号：US10116314

    申请日：2002-04-03

    申请人： Bent Edvold ,  Lene V. Jorgensen ,  Lars Gruner-Nielsen ,  William A. Reed

    发明人： Bent Edvold ,  Lene V. Jorgensen ,  Lars Gruner-Nielsen ,  William A. Reed

    IPC分类号： G02B628

    CPC分类号： G02B6/29376 ,  H04B10/25253

    摘要： A dispersion compensation module (DCM) for compensating dispersion of an optical fiber transmission link is provided. The optical fiber transmission link comprises a transmission fiber and the DCM. The DCM comprises at least first and second dispersion compensating fibers, DCF1 and DCF2, respectively. DCF1 and DCF2 each have a dispersion, D1 and D2, respectively, a dispersion slope, S1 and S2, respectively, and a relative dispersion slope, RDS1 and RDS2, respectively. The transmission fiber also has a dispersion, DTransFiber, a dispersion slope, STransFiber, and a relative dispersion slope, RDSTransFiber. DCF1 and DCF2 are selected based on their respective relative dispersion slopes, RDS1 and RDS2, respectively. DCF1 and DCF2 have particular, lengths, L1 and L2, respectively. The DCFs are combined with each other and with the transmission fiber and RDS1 and RDS2 are such that the combination of the transmission fiber with the combined DCFs results in overall dispersion compensation of the optical fiber transmission link.

    摘要翻译： 提供了用于补偿光纤传输链路的色散的色散补偿模块（DCM）。 光纤传输链路包括传输光纤和DCM。 DCM至少分别包括第一和第二色散补偿光纤DCF1和DCF2。 分别具有色散斜率S1和S2以及相对色散斜率RDS1和RDS2。 传输光纤还具有色散，DTransFiber，色散斜率，STransFiber和相对色散斜率RDSTransFiber。 分别基于它们各自的相对色散斜率RDS1和RDS2来选择DCF1和DCF2。 DCF1和DCF2分别具有特定的长度L1和L2。 DCF彼此组合，并且传输光纤和RDS1和RDS2使得传输光纤与组合的DCF的组合导致光纤传输链路的总体色散补偿。

    Method of fabricating graded-index optical fiber lenses
    3.
    发明授权
    Method of fabricating graded-index optical fiber lenses 有权
    制造渐变折射率光纤透镜的方法

    公开(公告)号：US07013678B2

    公开(公告)日：2006-03-21

    申请号：US10247101

    申请日：2002-09-19

    申请人： David J. DiGiovanni ,  William A. Reed ,  Andrew D. Yablon ,  Man F. Yan

    发明人： David J. DiGiovanni ,  William A. Reed ,  Andrew D. Yablon ,  Man F. Yan

    IPC分类号： C03B37/018

    CPC分类号： G02B6/0281 ,  C03B37/01228 ,  C03B2201/31 ,  C03B2203/14 ,  C03B2203/26 ,  C03B2203/42 ,  G02B6/32

    摘要： A GRIN fiber lens is fabricated by the steps of providing a graded index glass preform, thinning the graded index preform to remove a sufficient thickness of the graded glass to establish a desired Δn, and drawing a graded index optical fiber from the thinned graded index preform. Thinning, in this context, refers to removal of graded index glass from the outside of the graded index preform so as to reduce its outer diameter. The thinning thus changes Δn which is the refractive index difference between the center of the preform and its outer surface. The graded index preform can be provided by MCVD deposition followed by removal of the starting tube glass, by OVD deposition, by VAD, or by ion exchange fabrication. The thinned graded index preform is advantageously annealed before drawing in order to minimize ripple. And, in a variation of the process, an overcladding can be applied over the thinned graded preform before draw for further adjustment or control of the Δn.

    摘要翻译： 通过以下步骤制造GRIN纤维透镜：提供渐变折射率玻璃预成型件，使渐变折射率预成型件变薄以去除足够厚度的渐变玻璃以建立所需的Deltan，并从减薄的渐变折射率预成型件 。 在本文中，变薄是指从分级折射率预成型件的外部去除渐变的折射率玻璃，从而减小其外径。 变薄因此改变Deltan，Deltan是预成型件的中心与其外表面之间的折射率差。 分级折射率预成型件可以通过MCVD沉积提供，然后通过OVD沉积，VAD或通过离子交换制造去除起始管玻璃。 减薄的渐变折射率预成型件在拉伸之前有利地被退火，以使纹波最小化。 而且，在该过程的变化中，可以在拉伸之前在薄化的梯度预成型件上施加外包以进一步调节或控制Deltan。

    Method for retorting particulate solids having recoverable volatile constituents in a rotating horizontal chamber
    5.
    发明授权
    Method for retorting particulate solids having recoverable volatile constituents in a rotating horizontal chamber 失效
    在旋转水平室中蒸馏具有可回收的挥发性成分的颗粒固体的方法

    公开(公告)号：US4477331A

    公开(公告)日：1984-10-16

    申请号：US495423

    申请日：1983-05-17

    申请人： Leland M. Reed ,  William A. Reed ,  Walter C. Saeman

    发明人： Leland M. Reed ,  William A. Reed ,  Walter C. Saeman

    IPC分类号： C10B53/06 ,  C10G1/02 ,  F23G5/20 ,  F23G5/46 ,  C10G1/00

    CPC分类号： F23B1/32 ,  C10G1/02 ,  F23G5/20 ,  F23G5/46 ,  F23G2209/12 ,  F23G2209/24

    摘要： A method and apparatus is disclosed for retorting particulate solid materials, particularly hydrocarbon-containing materials such as oil shale, oil sands, tar sands, coal shale, coal tailings, and the like, for the recovery of a volatile constituent such as oil or gas. A rotary retorting apparatus is employed which consists of a cylindrical drum, or other similar regularly shaped chamber, with a substantially horizontal axis of rotation and having multiple compartments for retorting and combustion and, optionally, spent solids cooling. The apparatus further includes solids transport chutes for forward and backward circulation of solids, arranged for the intercompartmental transfer of solids with the capability of additions at one or more points in each compartment. Employing the method and apparatus, particulate solids feedstock is heated by recycled spent solids material to remove the volatile constituent of the feedstock in the retort section. Another feature of the invention employs direct solids-to-gas contact established by lifting and cascading reacting solids through hot gas streams such that throughput, high thermal efficiency, low energy input, among other advantages, are obtained in producing high yields of volatile product. In particular, high oil yields and gas yields are obtained when processing oil shale, but with low sulfur oxides, nitrogen oxides in the flue gases and reduced hydrogen sulfide in the retort gases.

    摘要翻译： 公开了用于蒸馏颗粒状固体材料，特别是含烃材料如油页岩，油砂，焦油砂，煤页岩，煤尾矿等的方法和装置，用于回收挥发性成分如油或气体 。 旋转式蒸煮设备由圆柱形滚筒或其它类似的规则形状的腔室组成，具有基本上水平的旋转轴线，并且具有用于蒸馏和燃烧的多个隔间，以及任选的废固体冷却。 该设备还包括用于固体的正向和反向循环的固体输送滑槽，其被布置用于在每个隔间中的一个或多个点处具有添加能力的固体的间隔间转移。 使用该方法和装置，通过再循环的废固体材料来加热颗粒状固体原料，以除去蒸馏段中原料的挥发性成分。 本发明的另一个特征是通过将固体通过热气流提升和级联来建立的直接的固体 - 气体接触，从而在产生高产率的挥发性产物方面获得了高产量，高热效率，低能量输入等优点。 特别地，当处理油页岩时，获得高油产量和产气量，但是在硫酸气体中，硫氧化物，烟道气中的氮氧化物和还原的硫化氢中都有这些产率。