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1. 发明授权

US5889899A Article comprising a Bragg reflective Mach-Zehnder filter of reduced coupled dependence 失效
标题翻译：该文章包括减少耦合依赖性的布拉格反射马赫 - 曾德滤波器
公开(公告)号：US5889899A
公开(公告)日：1999-03-30
申请号：US950899
申请日：1997-10-15
申请人： Charles Howard Henry , Christi Kay Madsen , Thomas A. Strasser
发明人： Charles Howard Henry , Christi Kay Madsen , Thomas A. Strasser
IPC分类号： G01B9/02 , G01J9/02 , G02B6/12 , H04B10/02 , H04B10/28 , G02F1/295 , G02B6/34
CPC分类号： G02B6/12007 , G02B2006/12159
摘要： 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.
摘要翻译：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。

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

US07212695B2 Variable optical delay line with a large continuous tuning range 有权
标题翻译：可变光延迟线具有较大的连续调谐范围
公开(公告)号：US07212695B2
公开(公告)日：2007-05-01
申请号：US10634403
申请日：2003-08-05
申请人： Albin Lloyd Kasper , Jane D. LeGrange , Christi Kay Madsen
发明人： Albin Lloyd Kasper , Jane D. LeGrange , Christi Kay Madsen
IPC分类号： G02B6/00 , H04B10/00
CPC分类号： G02B6/2861 , G02B6/3512 , G02B6/3558
摘要： In accordance with the invention, a variable optical delay line with a large continuous tuning range comprises an incremental variable delay line to provide delay selected from a sequence of incrementally differing delays and a continuous variable delay line to provide a continuously variable delay over a range encompassing a delay increment in the first variable delay line. In a preferred embodiment, the first variable delay line comprises an array of delay paths where each path is curved differently from the others to provide an incrementally different delay. The second variable delay line is a tunable delay path continuously tunable over the delay increment of the first.
摘要翻译：根据本发明，具有大的连续调谐范围的可变光学延迟线包括增量可变延迟线，以提供从递增不同延迟的序列中选择的延迟和连续可变延迟线，以在包围的范围内提供连续可变的延迟在第一可变延迟线中的延迟增量。在优选实施例中，第一可变延迟线包括延迟路径的阵列，其中每个路径与其他路径不同地弯曲以提供递增不同的延迟。第二可变延迟线是在第一可变延迟线的延迟增量上连续可调的可调延迟路径。

4. 发明授权

US06807321B2 Apparatus and method for measurement and adaptive control of polarization mode dispersion in optical fiber transmission systems 有权
标题翻译：光纤传输系统中偏振模色散的测量和自适应控制的装置和方法
公开(公告)号：US06807321B2
公开(公告)日：2004-10-19
申请号：US10180842
申请日：2002-08-19
申请人： Christi Kay Madsen
发明人： Christi Kay Madsen
IPC分类号： G02B600
CPC分类号： G02B6/278 , G02B6/29343 , H04B10/2569
摘要： In accordance with the invention, an optical fiber transmission system is provided with a new method and apparatus to measure PMD and then to use the measurements to control adaptive optical filters that minimize system signal degradation. The measurements provide accurate information to compensate for distortions and thereby permit higher transmission rates. The new technique can obtain phase information without optical heterodyning and without bandlimiting. In a first embodiment, an optical signal transmitter, such as a laser/modulator pair, is driven by a data signal combined with a test signal, in the form of a comb of tones with known relative magnitude and phase relationships. Tunable all pass filters recover phase and magnitude information to control an adaptive filter for precise compensation. In a second embodiment, no changes are made to the transmitted signal. The relative delay between orthogonal polarizations of a modulated signal can be obtained by using a polarization beam splitter (PBS), flipping (rotating by 90°) the polarization of one output, sweeping a narrowband optical filter (NBF) across the signal spectrum and detecting the interference between polarizations. Additional detectors can obtain the magnitude versus frequency for the orthogonal components, x and y.
摘要翻译：根据本发明，光纤传输系统被提供有测量PMD的新方法和装置，然后使用测量来控制使系统信号劣化最小化的自适应光学滤波器。这些测量提供了准确的信息来补偿失真，从而允许更高的传输速率。新技术可以获得没有光学外差和无限幅的相位信息。在第一实施例中，诸如激光/调制器对的光信号发射器以与已知相对幅度和相位关系的音调梳形式的与测试信号组合的数据信号驱动。可调谐全通滤波器恢复相位和幅度信息，以控制自适应滤波器进行精确补偿。在第二实施例中，不对发送的信号进行任何改变。调制信号的正交极化之间的相对延迟可以通过使用偏振分束器（PBS），翻转（旋转90°）一个输出的偏振，扫过信号频谱上的窄带滤光器（NBF）并检测极化之间的干扰。附加的检测器可以获得正交分量x和y的幅度对频率。

5. 发明授权

US06522795B1 Tunable etched grating for WDM optical communication systems 有权
标题翻译： WDM光通信系统可调蚀刻光栅
公开(公告)号：US06522795B1
公开(公告)日：2003-02-18
申请号：US09573988
申请日：2000-05-17
申请人： Rebecca Jordan , Christi Kay Madsen
发明人： Rebecca Jordan , Christi Kay Madsen
IPC分类号： G02B634
CPC分类号： G02F1/0115 , G02F1/0147 , G02F1/065 , G02F2201/307
摘要： In accordance with the present invention, a waveguide grating comprises a core and a first cladding material adjacent the core. The first cladding is configured, as by etching, to provide a periodic grating, and a second cladding material having a controllable refractive index overlies the first cladding material. If the index of the second cladding is different from that of the first cladding, the configuration of the first cladding provides an optical grating. If, however, the controllable index of the second cladding is adjusted to equal that of the first cladding, the grating becomes essentially transparent. This grating is particularly useful as a reconfigurable add/drop filter in a WDM optical communication system. It is also useful in grating-assisted couplers and variable optical delay lines.
摘要翻译：根据本发明，波导光栅包括与芯相邻的芯和第一包层材料。如通过蚀刻，第一包层被配置成提供周期性光栅，并且具有可控折射率的第二覆层材料覆盖在第一覆层材料上。如果第二包层的折射率不同于第一包层的折射率，则第一包层的构造提供光栅。然而，如果将第二包层的可控索引调整为与第一包层的可控折射率相等，则光栅基本上是透明的。该光栅在WDM光通信系统中作为可重配置的分插滤波器特别有用。它也可用于光栅辅助耦合器和可变光延迟线。

6. 发明授权

US06389203B1 Tunable all-pass optical filters with large free spectral ranges 有权
标题翻译：可调式全通滤光片，具有大的自由光谱范围
公开(公告)号：US06389203B1
公开(公告)日：2002-05-14
申请号：US09573086
申请日：2000-05-17
申请人： Rebecca Jordan , Christi Kay Madsen
发明人： Rebecca Jordan , Christi Kay Madsen
IPC分类号： G02B612
CPC分类号： G02F1/3136 , G02B6/12002 , G02F1/0147 , G02F1/065 , G02F2203/15
摘要： In accordance with the invention, a tunable optical all-pass filter with a substrate-supported multilayer waveguiding structure. A first layer including a waveguiding optical ring resonator, a second layer for spacing, and a third layer including a curved waveguide. The curved waveguide is optically coupled to the resonator by two spaced apart optical couplers extending through the spacing layer, and tunability is provided by a first phase-shifter to control the optical pathlength of the resonator and a second phase-shifter operative on the waveguide to control the strength of coupling between the waveguide and the resonator. In one embodiment, the waveguide and the resonator are horizontally spaced apart in the non-coupling regions to provide optical isolation. In another, the waveguide and resonator can overlap horizontally, but the spacer layer is thicker in the non-coupling regions to provide optical isolation.
摘要翻译：根据本发明，一种具有基板支撑的多层波导结构的可调光学全通滤波器。包括波导光环谐振器，第二间隔层和包括弯曲波导的第三层的第一层。弯曲波导通过延伸穿过间隔层的两个间隔开的光耦合器光学耦合到谐振器，并且可调谐性由第一移相器提供以控制谐振器的光路长度，以及在波导上操作的第二移相器控制波导与谐振器之间的耦合强度。在一个实施例中，波导和谐振器在非耦合区域中水平间隔开以提供光隔离。在另一个中，波导和谐振器可以水平重叠，但是在非耦合区域中间隔层较厚，以提供光学隔离。

7. 发明授权

US07228037B2 Integrated polarization beam splitter with quarter-wave plate for polarimeter and PMD compensation applications 有权
标题翻译：具有四分之一波长板的集成偏振分束器，用于旋光仪和PMD补偿应用
公开(公告)号：US07228037B2
公开(公告)日：2007-06-05
申请号：US10458440
申请日：2003-06-10
申请人： Christi Kay Madsen
发明人： Christi Kay Madsen
IPC分类号： G02B6/44
CPC分类号： H04B10/2569 , G01J4/00
摘要： An optical device for changing polarization comprises a waveguide having a waveguide end facet coupled to a quarter-wave plate/reflector combination to rotate the polarization of incident light to the waveguide by 90 degrees. In one embodiment, a polarization beam splitter/rotator combination (PBSR) uses a quarter-wave plate in reflection at the end facet of the waveguide. The polarization beam splitter/rotator combination and variations of that structure are applied in various useful topologies as polarization mode dispersion (PMD) compensators and polarimeters.
摘要翻译：用于改变偏振的光学装置包括具有耦合到四分之一波片/反射器组合的波导端面的波导，以将入射光的偏振旋转到波导90度。在一个实施例中，偏振分束器/旋转器组合（PBSR）在波导的端面使用四分之一波片反射。偏振分束器/旋转器组合和该结构的变化被应用在各种有用的拓扑中作为偏振模色散（PMD）补偿器和偏振计。

8. 发明授权

US06956991B2 Compact solid-state variable optical delay line with a large continuous tuning range 失效
公开(公告)号：US06956991B2
公开(公告)日：2005-10-18
申请号：US10634481
申请日：2003-08-05
申请人： Christi Kay Madsen
发明人： Christi Kay Madsen
IPC分类号： G02B6/26 , G02F1/00
CPC分类号： G02F1/00 , G02F2201/20
摘要： In accordance with the invention, a variable delay line with continuous tuning comprises an optical path providing at least one continuous delay element coupled to a series of switchable binary fixed delays. The series of switchable delays can be configured to select a delay among a plurality of incremental delays, and the continuous delay can set a continuous delay in a range encompassing the delay increment of the binary series. In a preferred embodiment, the variable delay element comprises a tunable all pass filter (APF) with delay tunable from essentially 0 to a time T and the switchable binary fixed delays form a series (0,T), (0, 2T), (0, 4T), . . . , [0, (2n+1)], where n is an integer ≧0. The switches are preferably Mach-Zehnder switches. In an alternative embodiment, the continuous delay element comprises a suitable pair of APF arms. The path and all components can be fabricated as an integrated planar waveguide (solid state) device.

9. 发明授权

US06907156B1 Reconfigurable multi-channel filters having enhanced channel bandwidth 有权
标题翻译：具有增强的信道带宽的可重新配置的多信道滤波器
公开(公告)号：US06907156B1
公开(公告)日：2005-06-14
申请号：US09573085
申请日：2000-05-17
申请人： Christi Kay Madsen
发明人： Christi Kay Madsen
IPC分类号： G02B6/12 , G02B6/125 , G02B6/42 , G02F1/225 , G02B6/28 , G02B6/26
CPC分类号： G02B6/12004 , G02B6/125 , G02B6/4246 , G02B2006/12061 , G02B2006/12097 , G02B2006/12123 , G02B2006/1215 , G02B2006/12173
摘要： In accordance with the invention, an MZI-based reconfigurable multi-channel filter is provided with enhanced channel bandwidth by adding an all-pass filter to one or both of the MZI arms. The result is a square-shaped amplitude response closely approximating the ideal.
摘要翻译：根据本发明，通过向MZI臂的一个或两个添加全通滤波器，为基于MZI的可重新配置的多信道滤波器提供增强的信道带宽。结果是方形振幅响应紧密接近理想。

10. 发明授权

US06801721B1 Polarization mode dispersion compensator for optical fiber communication systems 有权
标题翻译：光纤通信系统的偏振模色散补偿器
公开(公告)号：US06801721B1
公开(公告)日：2004-10-05
申请号：US09825691
申请日：2001-04-04
申请人： Christi Kay Madsen
发明人： Christi Kay Madsen
IPC分类号： H04B1010
CPC分类号： H04B10/2569
摘要： Optical infinite impulse response (IIR) filters are efficient polarization mode dispersion (PMD) compensators, requiring fewer stages than finite impulse response (FIR) filters. IIR filter architectures incorporating allpass filters allow the phase and magnitude compensation to be addressed separately. An IIR filter PMD compensator comprising a polarization beam splitter, allpass filters, polarization rotation devices, a 2×2 filter, and a polarization beam combiner optically coupled is described.
摘要翻译：光无限脉冲响应（IIR）滤波器是有效的偏振模色散（PMD）补偿器，比有限脉冲响应（FIR）滤波器需要更少的级。结合全通滤波器的IIR滤波器架构允许单独寻址相位和幅度补偿。描述了包括偏振分束器，全通滤波器，偏振旋转装置，2x2滤波器和光耦合的偏振光束组合器的IIR滤波器PMD补偿器。

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