公开(公告)号：US20050031259A1

公开(公告)日：2005-02-10

申请号：US10896779

申请日：2004-07-22

Applicant: Jinxi Shen ,  Robert McLeod ,  Douglas Crafts ,  Barthelemy Fondeur ,  Yong Ding ,  Pang-Chen Sun

Inventor： Jinxi Shen ,  Robert McLeod ,  Douglas Crafts ,  Barthelemy Fondeur ,  Yong Ding ,  Pang-Chen Sun

IPC: G02B6/26

CPC classification number: H04B10/0795 ,  G02B6/12019

Abstract: An apparatus for monitoring an input optical signal at a plurality of distinct optical frequencies is disclosed wherein a demultiplexing arrayed waveguide grating (AWG) having a plurality of M>1 Vernier input ports is disposed between an optical switch and a photodiode array coupled to the output ports of the AWG. In operation, the optical switch sequentially provides the input optical signal into each of the Vernier ports, and signals detected by photodiodes are stored in a memory unit. The apparatus is capable of monitoring the input optical signal with a frequency step which is M times smaller than a frequency spacing between the AWG transmission bands, and obtain M frequency-resolved readings from each photodiode.

Abstract translation: 公开了一种用于监控多个不同光频率的输入光信号的装置，其中具有多个M> 1游标输入端口的解复用阵列波导光栅（AWG）被布置在光开关和耦合到输出端的光电二极管阵列之间 特设工作组的港口。 在操作中，光开关顺序地将输入光信号提供给每个游标端口，并且由光电二极管检测的信号被存储在存储器单元中。 该装置能够以比AWG传输频带之间的频率间隔小M倍的频率步长来监测输入光信号，并且从每个光电二极管获得M个频率分辨的读数。

公开(公告)号：US06790263B1

公开(公告)日：2004-09-14

申请号：US09661902

申请日：2000-09-14

Applicant: Yong Ding ,  Benjamin Bikson ,  Joyce Katz Nelson

Inventor： Yong Ding ,  Benjamin Bikson ,  Joyce Katz Nelson

IPC: B01D7164

CPC classification number: C08G73/10 ,  B01D53/228 ,  B01D69/12 ,  B01D71/64 ,  B01D71/82

Abstract: Soluble polyamic acid salt (PAAS) precursors comprised of tertiary and quaternary amines, ammonium cations, sulfonium cations, or phosphonium cations, are prepared and fabricated into membranes that are subsequently imidized and converted into rigid-rod polyimide articles, such as membranes with desirable gas separation properties. A method of enhancing solubility of PAAS polymers in alcohols is also disclosed.

Abstract translation: 制备由叔胺和季胺，铵阳离子，锍阳离子或鏻阳离子组成的可溶性聚酰胺酸盐（PAAS）前体，并将其制成膜，随后将其酰亚胺化并转化为刚性聚酰亚胺制品，例如具有所需气体的膜 分离性能。 还公开了增加PAAS聚合物在醇中的溶解度的方法。

公开(公告)号：US06723152B2

公开(公告)日：2004-04-20

申请号：US10187124

申请日：2002-07-01

Applicant: Benjamin Bikson ,  Yong Ding ,  Johann Katz Leroux ,  Joyce Katz Nelson

Inventor： Benjamin Bikson ,  Yong Ding ,  Johann Katz Leroux ,  Joyce Katz Nelson

IPC: B01D5322

CPC classification number: B01D53/228 ,  B01D71/32 ,  B01D71/44 ,  B01D71/76

Abstract: A preferred gas separation membrane made from a blend of a copolymer of 2,2-bis(trifluoromethyl)-4,5-difluoro-1,3-dioxole (BDD) and tetrafluoroethylene (TFE) with a 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxide based polymer is disclosed, the membrane exhibiting an advantageous combination of gas separation and permeation properties for a number of gas separation applications. In particular, the membrane formed from the blend of these polymers exhibits unexpectedly high gas separation factors for separation of volatile organic hydrocarbon vapors (VOC) from air, compared to the component polymers that form the blends. Fabrication of composite membranes formed from perfluoropolymer blends is further disclosed.

Abstract translation: 优选的气体分离膜由2,2-双（三氟甲基）-4,5-二氟-1,3-二氧杂环戊烯（BDD）和四氟乙烯（TFE）的共聚物与2,2,4-三氟 公开了5-三氟甲氧基-1,3-二氧化物基聚合物，所述膜对于多种气体分离应用显示出气体分离和渗透性质的有利组合。 特别地，与形成共混物的组分聚合物相比，由这些聚合物的共混物形成的膜显示出用于将挥发性有机烃蒸气（VOC）与空气分离的意想不到的高气体分离因子。 进一步公开了由全氟聚合物共混物形成的复合膜的制造。