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1. 发明授权

US06118909A Athermal optical devices 失效
标题翻译：光热器件
公开(公告)号：US06118909A
公开(公告)日：2000-09-12
申请号：US22338
申请日：1998-02-11
申请人： Jerry Chia-yung Chen , Corrado Dragone , Yuan P. Li
发明人： Jerry Chia-yung Chen , Corrado Dragone , Yuan P. Li
IPC分类号： G02B6/13 , G02B6/10 , G02B6/12 , G02B6/34 , G02B6/26
CPC分类号： G02B6/12011 , G02B6/10 , G02B6/12028
摘要： Optical devices, such as wavelength routers, having a plurality of waveguides of differing lengths, with improved independence to temperature fluctuations. Improved temperature independence is achieved by varying the cross-section of the device waveguides. Cross-section variation can be implemented in one or more of the following ways: selectively applying a temperature-compensating material (e.g., a polymer) over portions of the waveguides, and/or varying the dimensions and/or compositions of the materials used in the waveguides, either along each waveguide or between waveguides or both. By carefully designing the devices, the temperature effects resulting from the different lengths of the different waveguides can be compensated to produce a relatively temperature-independent device. The index of refraction of the temperature-compensating material changes with temperature in the same direction as the indices of refraction of the rest of the waveguide materials, and the effective length of the portion of a waveguide covered by the temperature-compensating material is inversely proportional to the effective length of the waveguide.
摘要翻译：具有多个不同长度的波导的诸如波长路由器的光学装置具有改进的对温度波动的独立性。通过改变器件波导的横截面来实现改善的温度独立性。横截面变化可以以以下一种或多种方式实现：在波导的部分上选择性地施加温度补偿材料（例如，聚合物），和/或改变所使用的材料的尺寸和/或组成波导，沿着每个波导，或在波导之间或两者。通过仔细设计这些器件，可以补偿由不同波长的不同长度产生的温度效应以产生相对温度无关的器件。温度补偿材料的折射率随着温度与其余波导材料的折射率相同的方向变化，并且由温度补偿材料覆盖的波导部分的有效长度成反比到波导的有效长度。

2. 发明授权

US6035080A Reconfigurable add-drop multiplexer for optical communications systems 失效
标题翻译：用于光通信系统的可重配置分插复用器
公开(公告)号：US6035080A
公开(公告)日：2000-03-07
申请号：US879929
申请日：1997-06-20
申请人： Charles Howard Henry , Gadi Lenz , Yuan P. Li , Christi Kay Madsen , Herman Melvin Presby , Ronald Edward Scotti
发明人： Charles Howard Henry , Gadi Lenz , Yuan P. Li , Christi Kay Madsen , Herman Melvin Presby , Ronald Edward Scotti
IPC分类号： G02B6/34 , H04J14/02 , H04Q11/00
CPC分类号： G02B6/12007 , H04J14/0206 , H04J14/0212 , H04Q11/0005 , G02B6/29319 , G02B6/29353 , G02B6/29355 , G02B6/29383 , G02B6/3508 , G02B6/3596 , H04J14/0204 , H04J14/0205 , H04Q2011/0022 , H04Q2011/0035
摘要： In accordance with the invention, an optical multiplexer includes at least one reconfigurable add-drop unit that can add-drop one channel out of a large set by switching the light path through one of a set of fixed add-drop filters. Reconfiguration is done by switching from the add-drop filter path to a bypass path, changing to a different add-drop filter and then switching back. The phase delay of the bypass path is adjusted to maintain nearly maximum transmission during switching. The selection among add-drop filters is done by sliding an integrated optic chip with the set of add-drop filters between input and output waveguides. The reconfigurable add-drop multiplexer unit is latchable, passive between reconfigurations, and has low intrinsic insertion loss. Plural units in series can add/drop plural channels.
摘要翻译：根据本发明，光复用器包括至少一个可重新配置的分插单元，其可以通过将一组通道中的一个固定分插滤波器切换成一个通道，从而将一个通道从大组中分出。重新配置是通过从分插过滤器路径切换到旁路路径，切换到不同的添加 - 删除过滤器，然后切换完成的。调整旁路路径的相位延迟，以保持切换期间接近最大的传输。通过在输入和输出波导之间使用一组加法滤波器滑动集成光学芯片来完成插入式滤波器之间的选择。可重新配置的分插复用器单元可重新配置之间是可锁定的，无源的，并具有低内在插入损耗。串联的多个单元可以添加/删除多个通道。

3. 发明授权

US5999290A Optical add/drop multiplexer having complementary stages 失效
标题翻译：具有互补级的光分插复用器
公开(公告)号：US5999290A
公开(公告)日：1999-12-07
申请号：US958496
申请日：1997-10-27
申请人： Yuan P. Li
发明人： Yuan P. Li
IPC分类号： G02B6/12 , G02B6/293 , G02B6/34 , H04J14/02
CPC分类号： G02B6/12016 , G02B6/12019
摘要： An add/drop multiplexer (ADM) 100 includes an optical demultiplexer 200 and an optical multiplexer 300 that are connected in series. The optical multiplexer and the optical demultiplexer each include a number of corresponding passbands, which means that the central wavelengths of the multiplexer's passbands are approximately equal to the central wavelengths of the demultiplexer's passbands. The performance of the ADM is improved by making the edges of corresponding passbands complementary to each other. In one illustrative design, the transmission of the demultiplexer decreases at its passband edges as the wavelength moves away from its central wavelength, whereas the transmission of the multiplexer increases as the wavelength moves away from its central wavelength. The resultant cascaded passband of the pair is wider than the passband of the demultiplexer alone, thereby increasing the number of ADMs in a chain for the same performance. Not surprisingly, the advantages of the present invention are most evident in a wavelength-division-multiplexed system having many geographically separated locations 71-74 interconnected by an optical transmission path, and where selected channels of information need to be inserted or removed from the optical transmission path.
摘要翻译：分插复用器（ADM）100包括串联连接的光解复用器200和光复用器300。光复用器和光解复用器各自包括多个对应的通带，这意味着多路复用器通带的中心波长近似等于解复用器通带的中心波长。通过使相应通带的边缘相互补充来提高ADM的性能。在一个说明性设计中，当波长远离其中心波长时，解复用器的传输在其通带边缘处减小，而多路复用器的传输随着波长远离其中心波长而增加。该对的所得级联通带比单独的多路分解器的通带宽，从而增加了相同性能的链中的ADM的数量。毫不奇怪，本发明的优点在具有通过光传输路径互连的许多地理上分离的位置71-74的波分复用系统中是最明显的，并且其中所选择的信道信道需要从光学器件插入或移除传输路径。

4. 发明授权

US5978539A Optical device having a temperature independent spectral response using nonplanar geometric distortion of a substrate 失效
标题翻译：具有使用基板的非平面几何变形的温度独立光谱响应的光学装置
公开(公告)号：US5978539A
公开(公告)日：1999-11-02
申请号：US943747
申请日：1997-10-03
申请人： Scott T. Davies , Daren Li , Yuan P. Li , Chellappan Narayanan , Kevin G. Sullivan , Jianluo Zhang
发明人： Scott T. Davies , Daren Li , Yuan P. Li , Chellappan Narayanan , Kevin G. Sullivan , Jianluo Zhang
IPC分类号： G02B6/12 , G02B6/122 , G02B6/34 , G02B6/10
CPC分类号： G02B6/1203 , G02B6/12 , G02B6/12007 , G02B6/122
摘要： An optical interconnection device has a passive control mechanism for substantially eliminating thermal effects on optical properties of the apparatus Specifically, the interconnection apparatus includes a control material coupled to an optical circuit substrate, wherein the control material has a thermal expansion coefficient that is different than a substrate thermal expansion coefficient. In response to an increase or decrease an ambient temperature, the control material thermally expands or contracts at a different rate than the substrate to create a non-planar substrate distortion transmitted to the core portion, thereby creating a temperature independent optical path length within the optical core portion.
摘要翻译：光互连装置具有用于基本上消除对该装置的光学特性的热影响的被动控制机构。具体地，该互连装置包括耦合到光电路基板的控制材料，其中控制材料的热膨胀系数不同于基板热膨胀系数。响应于增加或减少环境温度，控制材料以与衬底不同的速率热膨胀或收缩，以产生传输到芯部的非平面衬底失真，从而在光学器件内产生温度无关的光程长度核心部分。

5. 发明授权

US5852505A Dense waveguide division multiplexers implemented using a first stage fourier filter 失效
标题翻译：使用第一级傅里叶滤波器实现的密集波导分路复用器
公开(公告)号：US5852505A
公开(公告)日：1998-12-22
申请号：US759325
申请日：1996-12-02
申请人： Yuan P. Li
发明人： Yuan P. Li
IPC分类号： G02B6/12 , G02B6/28 , G02B6/34 , H04J14/02 , H04B10/20
CPC分类号： G02B6/2938 , G02B6/12007 , G02B6/29355 , H04J14/02 , G02B6/2861
摘要： A comb splitting system demultiplexes and/or multiplexes a plurality of optical signal channels at various wavelengths. The comb splitting system has at least two interconnected successive stages of wavelength division multiplexers (WDMs). The first stage comprises a Fourier filter that communicates bands of channels to respective WDMs of the second stage via suitable optical paths. Each of the bands has a plurality of the individual channels that are separated by at least one other of the channels. Each second stage WDM, which is allocated to a particular band, is interconnected to respective optical paths for carrying one or more individual channels. Furthermore, in accordance with a significant feature of the present invention, the passband width and periodicity (i.e., free spectral range) associated with the first stage Fourier filter are smaller than the passband width and periodicity associated with the second stage WDMs. Consequently, the second stage WDMs can be less expensive and physically smaller than the first stage WDM. Moreover, later stages can tolerate larger fabrication errors, do not require birefringence compensation, and can tolerate full environmental temperature variations without feedback control in the central office. In accordance with another feature of the present invention, a double filtering scheme can be utilized to reduce crosstalk between channels.
摘要翻译：梳状分离系统以多种不同波长对多个光信号通道进行解复用和/或复用。梳状分离系统具有至少两个互连的连续级的波分复用器（WDM）。第一级包括傅立叶滤波器，其经由合适的光路将信道频带传送到第二级的相应WDM。每个频带具有由至少另一个信道分离的多个单独信道。分配给特定频带的每个第二级WDM被互连到用于承载一个或多个单独信道的相应光路。此外，根据本发明的重要特征，与第一级傅立叶滤波器相关联的通带宽度和周期（即自由频谱范围）小于与第二级WDM相关联的通带宽度和周期性。因此，第二级WDM可以比第一级WDM更便宜并且物理上更小。此外，后期阶段可以容忍较大的制造误差，不需要双折射补偿，并且可以容忍在中心局无反馈控制的全部环境温度变化。根据本发明的另一特征，可以利用双重滤波方案来减少信道之间的串扰。

6. 发明授权

US5745619A Low-loss optical power splitter for high-definition waveguides 失效
标题翻译：用于高分辨率波导的低损耗光功率分配器
公开(公告)号：US5745619A
公开(公告)日：1998-04-28
申请号：US660245
申请日：1996-06-07
申请人： Yuan P. Li , Yan Wang
发明人： Yuan P. Li , Yan Wang
IPC分类号： G02B6/126 , G02B6/12 , G02B6/122 , G02B6/125 , G02B6/26
CPC分类号： G02B6/125 , G02B2006/1215
摘要： This invention relates to a novel design for a low-loss optical power splitter, in particular Y-branch types resulting from chemical vapor deposition (CVD) fabricated silica waveguides. More specifically, the present invention utilizes mode matching of the fundamental modes between the input and the output waveguides of a splitter to optimize the splitters operational performance. The optical power splitter of the present invention comprising an input waveguide region having a predetermined width (W) and capable of transmitting optical energy having a fundamental mode E.sub.1.sup.0. Additionally, the splitter includes at least two output waveguide regions positioned to receive at least a portion the optical energy from the input waveguide region wherein the output waveguide regions each have predetermined widths (w) and are capable of transmitting optical energy having a fundamental mode E.sub.2.sup.0 ; and wherein each pair of output waveguide regions are separated by a gap of a predetermined width (d) therebetween. Lastly, the operational performance of the splitter is enhanced in accordance with the present invention as a result of purposely selecting certain physical properties of the splitter design such that the fundamental modes E.sub.1.sup.0 and E.sub.2.sup.0 are substantially equal at the beginning of the output waveguide regions. Mode matching of the fundamental modes between the single input and the dual output waveguides of a splitting Y junction was central to achieving the improved performance.
摘要翻译：本发明涉及一种用于低损耗光功率分配器的新颖设计，特别是由化学气相沉积（CVD）制造的二氧化硅波导产生的Y分支型。更具体地，本发明利用分离器的输入和输出波导之间的基本模式的模式匹配来优化分离器的操作性能。本发明的光功率分配器包括具有预定宽度（W）的输入波导区域并且能够发射具有基本模式E10的光能。另外，分离器包括至少两个输出波导区域，定位成从输入波导区域接收光能的至少一部分，其中输出波导区域各自具有预定宽度（w），并且能够传输具有基本模式E20的光能 ; 并且其中每对输出波导区域之间以预定宽度（d）的间隙分开。最后，根据本发明，通过有意地选择分离器设计的某些物理特性，使得基本模式E10和E20在输出波导区域的开始处基本相等，从而增强了分路器的操作性能。分离Y结的单输入和双输出波导之间的基本模式的模式匹配是实现改进性能的核心。

7. 发明授权

US5745618A Optical device having low insertion loss 失效
标题翻译：具有低插入损耗的光器件
公开(公告)号：US5745618A
公开(公告)日：1998-04-28
申请号：US794711
申请日：1997-02-04
申请人： Yuan P. Li
发明人： Yuan P. Li
IPC分类号： G02B6/122 , G02B6/12 , G02B6/125 , G02B6/28 , G02B6/34 , G02B6/26
CPC分类号： G02B6/12011 , G02B6/125 , G02B2006/1215 , G02B2006/12154
摘要： An optical device 201, having one or more input waveguides 25 coupled to one side of a slab waveguide 20 and an array of output waveguides 26 coupled to an other side of the slab waveguide, is improved by including a transition region 22 immediately adjacent to the slab that operates to reduce insertion loss between the waveguide array 26 and the slab waveguide. The transition region includes a number of silica paths (a.sub.I . . . a.sub.n) that intersect the waveguide array. The silica paths have widths W(a.sub.n) that progressively decrease as they become further away from the slab waveguide. The silica paths are parallel to each other and perpendicular to the waveguide array. Disclosed embodiments include an M.times.N star coupler, a Dense Waveguide Division Multiplexer, and a 1.times.N power splitter. In each of these embodiments, insertion loss is substantially reduced over similar devices not employing such a transition region.
摘要翻译：具有耦合到平板波导20的一侧的一个或多个输入波导25和耦合到平板波导的另一侧的输出波导阵列26的光学装置201通过将过渡区域22紧挨着板，其操作以减少波导阵列26和平板波导之间的插入损耗。过渡区域包括与波导阵列相交的多个二氧化硅路径（aI。an）。二氧化硅路径的宽度W（a）随着它们进一步远离平板波导而逐渐减小。二氧化硅路径彼此平行并垂直于波导阵列。公开的实施例包括MxN星形耦合器，密集波导分频多路复用器和1xN功率分配器。在这些实施例的每一个中，相对于不采用这种过渡区域的类似器件，插入损耗大大降低。

8. 发明授权

US5719976A Optimized waveguide structure 失效
标题翻译：优化波导结构
公开(公告)号：US5719976A
公开(公告)日：1998-02-17
申请号：US547767
申请日：1995-10-24
申请人： Charles Howard Henry , Edward John Laskowski , Yuan P. Li , Henry Howard Yaffe
发明人： Charles Howard Henry , Edward John Laskowski , Yuan P. Li , Henry Howard Yaffe
IPC分类号： G02B6/30 , G02B6/12 , G02B6/122 , G02B6/126 , G02B6/34 , G02B6/26
CPC分类号： G02B6/12009 , G02B6/12004 , G02B6/122 , G02B6/1228 , G02B2006/12119 , G02B2006/12169
摘要： An optimized waveguide structure enables the functional integration of various passive optic components on a single substrate. The optimized waveguide structure is characterized by a thicker core layer than used for square core waveguides and a core width that changes according to different functional regions of the optic circuit within which it is incorporated. The height (H) of the waveguide core is determined by the thickness of the core layer defined during the fabrication process and is ideally uniform across the circuit. The width (W) of the core, however, is changed between functional regions by the photo-lithographic mask and the chemical etching during the fabrication process. By way of example, an optimized waveguide structure for a P-doped silica planar waveguide with a .DELTA. approximately 0.6% for wavelength .lambda.=1.2-1.7 .mu.m, has a single uniform height of H=6.7 .mu.m and a width that changes between W=4 .mu.m in a coupler region, W=5.5 .mu.m in a bend region, W=9 .mu.m in a fiber coupling region, and W=10 .mu.m in a phase grating region of a Dragone router. Adiabatic tapers are used as transition regions between regions of different core widths.
摘要翻译：优化的波导结构使得能够在单个基板上的各种无源光学元件的功能集成。优化的波导结构的特征在于比用于方芯波导的核心层更厚，并且根据其所结合的光电路的不同功能区域而变化的芯宽度。波导芯的高度（H）由在制造过程中限定的芯层的厚度确定，并且在整个电路上理想地是均匀的。然而，通过光刻掩模和制造过程中的化学蚀刻在功能区域之间改变芯的宽度（W）。作为示例，用于波长λ=1.2-1.7μm的DELTA约0.6％的P掺杂二氧化硅平面波导的优化波导结构具有H =6.7μm的单一均匀高度，并且宽度在在耦合器区域中W =4μm，在弯曲区域中W =5.5μm，在光纤耦合区域中W =9μm，在Dragone路由器的相位光栅区域中W =10μm。绝热锥度用作不同芯宽的区域之间的过渡区域。

9. 发明授权

US5706377A Wavelength routing device having wide and flat passbands 失效
标题翻译：具有宽且平坦通带的波长路由设备
公开(公告)号：US5706377A
公开(公告)日：1998-01-06
申请号：US682453
申请日：1996-07-17
申请人： Yuan P. Li
发明人： Yuan P. Li
IPC分类号： G02B6/12 , G02B6/125 , G02B6/34 , G02B6/26
CPC分类号： G02B6/12016 , G02B6/125 , G02B2006/1215 , G02B2006/12154 , G02B2006/12195
摘要： A wavelength routing device 500 includes a pair of dielectric slabs 10, 20 that are interconnected by an optical grating 30. The first dielectric slab 10 includes input ports for receiving optical signals that are routed to output ports of the second dielectric slab 20 according to their wavelengths. Y-branch splitters 70-1 are connected to the first dielectric slab. Splitters 70-1 each include a pair of adjacent waveguides, having widths (w.sub.1), that are separated from each other by a center-to-center distance (c.sub.1). Y-branch splitter 70-2 is connected to the second dielectric slab. Splitter 70-2 includes a pair of adjacent waveguides, having widths (w.sub.2), that are separated from each other by a center-to-center distance (c.sub.2). Preferably, 4w.sub.2 >w.sub.1 >1.5w.sub.2, and 4c.sub.2 >c.sub.1 >1.5c.sub.2. Associated with this routing device is a figure-of-merit (B.sub.1 /B.sub.2) that exceeds 0.5, which represents a substantial improvement over prior art designs. Such devices 500 are particularly useful in applications where they need to be cascaded.
摘要翻译：波长路由设备500包括通过光栅30互连的一对电介质板10,20.第一电介质板10包括用于接收光信号的输入端口，该信号根据它们被传送到第二电介质板20的输出端口波长。 Y分支分路器70-1连接到第一电介质板。分路器70-1各自包括一对相邻的波导，其具有宽度（w1），彼此以中心到中心的距离（c1）分开。 Y分支分路器70-2连接到第二电介质板。分路器70-2包括具有宽度（w2）的一对相邻的波导，它们彼此以中心到中心的距离（c2）分开。优选地，4w2> w1> 1.5w2，4c2> c1> 1.5c2。与该路由设备相关联的是超过0.5的品质因数（B1 / B2），这相当于现有技术设计的显着改进。这样的设备500在需要级联的应用中特别有用。

10. 发明授权

US06917760B2 Wide passband optical interleaver 失效
标题翻译：宽通带光交错器
公开(公告)号：US06917760B2
公开(公告)日：2005-07-12
申请号：US10039242
申请日：2001-12-31
申请人： Yuan P. Li , Yan Wang , Robert John Shine, Jr. , Kevin Sullivan
发明人： Yuan P. Li , Yan Wang , Robert John Shine, Jr. , Kevin Sullivan
IPC分类号： G02B6/34 , H04J14/02 , H04B10/00
CPC分类号： H04J14/02 , G02B6/29361 , G02B6/29386
摘要： A method and apparatus is provided for reformatting or interleaving a WDM signal that includes a plurality of optical channels having a first bandwidth and a first channel spacing. The method begins by receiving the WDM signal and dividing it into first and second subsets of optical channels each having a second channel spacing. Next, the first subset of optical channels are divided into third and fourth subsets of optical channels each having a third channel spacing. In addition, the second subset of optical channels is divided into fifth and sixth subsets of optical channels each having a fourth channel spacing. The third and fifth subsets of optical channels are combined to generate a first output WDM signal, while the fourth and sixth subsets of optical channels are combined to generate a second output WDM signal.
摘要翻译：提供了一种用于重新格式化或交织包括具有第一带宽和第一信道间隔的多个光信道的WDM信号的方法和装置。该方法通过接收WDM信号并将其划分为每个具有第二信道间隔的光信道的第一和第二子集开始。接下来，光信道的第一子集被分成具有第三信道间隔的光信道的第三和第四子集。另外，光信道的第二子集被分成具有第四信道间隔的光信道的第五和第六子集。光信道的第三和第五子集被组合以产生第一输出WDM信号，而光信道的第四和第六子集被组合以产生第二输出WDM信号。

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