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1. 发明申请

US20050018958A1 Optical system for calibration and control of an optical fiber switch 失效
公开(公告)号：US20050018958A1
公开(公告)日：2005-01-27
申请号：US10926705
申请日：2004-08-26
申请人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
发明人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
IPC分类号： G02B6/42 , G02B6/35 , G02B26/08 , H04Q3/52 , H04Q11/00 , G02B6/26
CPC分类号： H04Q11/0005 , G02B6/3546 , G02B6/3556 , G02B6/3586 , H04Q2011/0026 , H04Q2011/003 , H04Q2011/0037 , H04Q2011/0039 , H04Q2011/0049 , H04Q2011/0083
摘要： Methods of calibrating and operating optical switches as well as optical switches in which the orientations of mirrors are measured and controlled using control light beams and position sensing detectors are described. The present invention may provide high resolution control of a plurality of mirrors in an optical switch and thus allow the optical switch to cross-connect a large number of input and output ports with a low insertion loss.

2. 发明授权

US06898341B2 Optical system for calibration and control of an optical fiber switch 失效
标题翻译：用于光纤开关校准和控制的光学系统
公开(公告)号：US06898341B2
公开(公告)日：2005-05-24
申请号：US09999610
申请日：2001-10-24
申请人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Brian Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
发明人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Brian Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
IPC分类号： G02B6/42 , G02B6/35 , G02B26/08 , H04Q3/52 , H04Q11/00 , G02B6/26
CPC分类号： H04Q11/0005 , G02B6/3546 , G02B6/3556 , G02B6/3586 , H04Q2011/0026 , H04Q2011/003 , H04Q2011/0037 , H04Q2011/0039 , H04Q2011/0049 , H04Q2011/0083
摘要： Methods of calibrating and operating optical switches as well as optical switches in which the orientations of mirrors are measured and controlled using control light beams and position sensing detectors are described. The present invention may provide high resolution control of a plurality of mirrors in an optical switch and thus allow the optical switch to cross-connect a large number of input and output ports with a low insertion loss.
摘要翻译：描述了使用控制光束和位置感测检测器来测量和控制光学开关以及光学开关的校准和操作的方法。本发明可以提供光开关中的多个反射镜的高分辨率控制，从而允许光开关以低插入损耗交叉连接大量输入和输出端口。

3. 发明授权

US06980712B2 Optical system for calibration and control of an optical fiber switch 失效
公开(公告)号：US06980712B2
公开(公告)日：2005-12-27
申请号：US10926705
申请日：2004-08-26
申请人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Brian Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
发明人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Brian Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
IPC分类号： G02B6/42 , G02B6/35 , G02B26/08 , H04Q3/52 , H04Q11/00 , G02B6/26
CPC分类号： H04Q11/0005 , G02B6/3546 , G02B6/3556 , G02B6/3586 , H04Q2011/0026 , H04Q2011/003 , H04Q2011/0037 , H04Q2011/0039 , H04Q2011/0049 , H04Q2011/0083
摘要： Methods of calibrating and operating optical switches as well as optical switches in which the orientations of mirrors are measured and controlled using control light beams and position sensing detectors are described. The present invention may provide high resolution control of a plurality of mirrors in an optical switch and thus allow the optical switch to cross-connect a large number of input and output ports with a low insertion loss.

4. 发明授权

US06922500B2 Optical configuration for optical fiber switch 有权
标题翻译：光纤交换机的光学配置
公开(公告)号：US06922500B2
公开(公告)日：2005-07-26
申请号：US09999878
申请日：2001-10-24
申请人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Brian Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
发明人： Cheng-Chung Huang , Steven Saeed Nasiri , Randall Brian Sprague , Alex Harwit , Dmitry Vasily Bakin , Janusz Bryzek
IPC分类号： H04Q11/00 , G02B6/35
CPC分类号： H04Q11/0005 , H04Q2011/0026
摘要： An optical fiber switch in accordance with an embodiment of the present invention includes a first plurality of ports, a second plurality of ports, a first plurality of mirrors disposed on a first surface, and a second plurality of mirrors disposed on a second surface. Each one of the first plurality of mirrors is individually controllable to direct light output from a corresponding one of the first plurality of ports to any one of the second plurality of mirrors. Each one of the second plurality of mirrors is individually controllable to direct to a corresponding one of the second plurality of ports light incident on it from any one of the first plurality of mirrors. Advantageously, optical fiber switches in accordance with embodiments of the present invention may couple more than a thousand input ports to more than a thousand output ports with an insertion loss of less than about 3 decibels.
摘要翻译：根据本发明实施例的光纤开关包括第一多个端口，第二多个端口，设置在第一表面上的第一多个反射镜和设置在第二表面上的第二多个反射镜。所述第一多个反射镜中的每一个单独可控制以将从所述第一多个端口中的相应一个端口的光输出引导到所述第二多个反射镜中的任何一个。所述第二多个反射镜中的每一个独立地可控制以将所述第二多个端口中的相应一个端口引导到从所述第一多个反射镜中的任何一个反射镜入射到其上的光。有利地，根据本发明的实施例的光纤交换机可将多于一千个输入端口耦合到多于一千个输出端口，插入损耗小于约3分贝。

5. 发明授权

US07076146B2 Variable optical attenuator 失效
公开(公告)号：US07076146B2
公开(公告)日：2006-07-11
申请号：US10842025
申请日：2004-05-07
申请人： Zbigniew Sufleta , Janusz Bryzek , Alex Harwit , James Higgins Smith , Cheng-Chung Huang , Dmitry Vasily Bakin , Steven Saeed Nasiri
发明人： Zbigniew Sufleta , Janusz Bryzek , Alex Harwit , James Higgins Smith , Cheng-Chung Huang , Dmitry Vasily Bakin , Steven Saeed Nasiri
IPC分类号： G02B6/35
CPC分类号： G02B6/3512 , G02B6/266 , G02B6/3546 , G02B6/359 , G02B6/3594
摘要： A method of controllably attenuating a beam of light coupled into a port includes directing the beam of light against a mirror, and controlling an orientation of the mirror such that a predetermined fraction of the beam of light is coupled into the port. The predetermined fraction is less than a maximum fraction corresponding to optimal coupling of the beam of light into the port. The method may be implemented with a variable optical attenuator including a first port, a second port, a mirror located to direct light output by the first port to the second port, and a controller coupled to the mirror to align it such that the predetermined fraction of light is coupled into the second port. The method may also be implemented with an optical switch.

6. 发明授权

US06754431B2 Variable optical attenuator 有权
公开(公告)号：US06754431B2
公开(公告)日：2004-06-22
申请号：US09999838
申请日：2001-10-24
申请人： Zbigniew Sufleta , Janusz Bryzek , Alex Harwit , James Higgins Smith , Cheng-Chung Huang , Dmitry Vasily Bakin , Steven Saeed Nasiri
发明人： Zbigniew Sufleta , Janusz Bryzek , Alex Harwit , James Higgins Smith , Cheng-Chung Huang , Dmitry Vasily Bakin , Steven Saeed Nasiri
IPC分类号： G02B626
CPC分类号： G02B6/3512 , G02B6/266 , G02B6/3546 , G02B6/359 , G02B6/3594
摘要： A method of controllably attenuating a beam of light coupled into a port includes directing the beam of light against a mirror, and controlling an orientation of the mirror such that a predetermined fraction of the beam of light is coupled into the port. The predetermined fraction is less than a maximum fraction corresponding to optimal coupling of the beam of light into the port. The method may be implemented with a variable optical attenuator including a first port, a second port, a mirror located to direct light output by the first port to the second port, and a controller coupled to the mirror to align it such that the predetermined fraction of light is coupled into the second port. The method may also be implemented with an optical switch.

7. 发明授权

US06636656B2 System architecture of optical switching fabric 失效
标题翻译：光交换结构体系结构
公开(公告)号：US06636656B2
公开(公告)日：2003-10-21
申请号：US10002310
申请日：2001-10-24
申请人： Cheng-Chung Huang , Steven S. Nasiri , Alex Harwit , Dmitry Vasily Bakin , Randall Brian Sprague , Janusz Bryzek
发明人： Cheng-Chung Huang , Steven S. Nasiri , Alex Harwit , Dmitry Vasily Bakin , Randall Brian Sprague , Janusz Bryzek
IPC分类号： G02B626
CPC分类号： G02B6/3512 , G02B6/359
摘要： An optical switching fabric enables an optical signal entering the device on any one of multiple input ports to be directed to any one of multiple output ports. The present optical switching fabrics include sensing and monitoring devices that permit precise initial calibration and continuous switch connection status monitoring and control. Light entering the switching fabric on an input port is reflected by one of a first set of individually controllable mirrors to one of a second set of individually controllable mirrors and then to a corresponding output port. The switching fabrics include control lasers and position sensing devices which provide output signals corresponding to the orientations of the mirrors. In addition, a subset of the input ports and output ports can be attached to monitor light sources and detectors for recalibration and control. Further, sensors for detecting the intensity of input signals, of signals that have been reflected by a mirror in the first set and by a mirror in the second set, and of signals backscattered from the output ports may be included.
摘要翻译：光交换结构使得能够将进入多个输入端口中的任何一个的设备的光信号引导到多个输出端口中的任何一个。本发明的光交换结构包括能够精确地进行初始校准和连续切换连接状态监视和控制的感测和监视设备。在输入端口上进入交换结构的光被第一组单独可控的反射镜中的一个反射到第二组单独可控的反射镜中的一个，然后到相应的输出端口。交换结构包括控制激光器和位置感测装置，其提供对应于反射镜取向的输出信号。此外，输入端口和输出端口的子集可以附加到监视光源和检测器上以进行重新校准和控制。此外，可以包括用于检测由第一组中的反射镜和第二组中的反射镜反射的信号的输入信号的强度的传感器和从输出端口反向散射的信号。

8. 发明授权

US5825525A Electro-optic modulator with voltage tunable quantum well waveguide cladding layer 失效
标题翻译：具有电压可调量子阱波导包层的电光调制器
公开(公告)号：US5825525A
公开(公告)日：1998-10-20
申请号：US586195
申请日：1996-01-12
申请人： Alex Harwit
发明人： Alex Harwit
IPC分类号： G02F1/015 , G02F1/017 , G02F1/025 , G02F1/03
CPC分类号： B82Y20/00 , G02F1/01708 , G02F1/025 , G02F2001/0157
摘要： An electro-optic modulator (300) comprises a multiple quantum well core layer (320) in which the band gap and refractive index are adjusted to make the core layer (320) transparent to light at a selected wavelength and a voltage tunable, multiple quantum well cladding layer (330) in which an exciton absorption provides the cladding layer (330) with a first refractive index that is less than the core refractive index when a first voltage is applied and a second refractive index that approaches or exceeds the core refractive index when a second voltage is applied. The exciton absorption also provides the voltage tunable cladding layer (330) with a substantially greater absorption coefficient at the selected wavelength than that of the core layer (320). The core and voltage tunable cladding layers (320, 330) are combined with a second cladding layer (310) to form a waveguide in which light is confined to the low loss core layer (320) in the first voltage state and diverted into the highly absorbing voltage tunable cladding layer (330) in the second voltage state. In a preferred embodiment of the modulator (300), the multiple quantum well core and cladding layers (320, 330) comprise GaAs quantum wells and AlGaAs barriers. The small effective absorption coefficient of the core layer (320) and the large difference between this absorption coefficient and that of the voltage tunable cladding layer (330) in the off state provide a modulator (300) characterized by a higher contrast ratio and, simultaneously, a lower insertion loss than are available from conventional electro-absorption or electro-refraction based modulators.
摘要翻译：电光调制器（300）包括多量子阱核心层（320），其中调整带隙和折射率以使芯层（320）对于选定波长的光和电压可调谐多重量子（320）是透明的其中激子吸收为包层（330）提供第一折射率，其在施加第一电压时小于芯折射率，并且第二折射率接近或超过芯折射率当施加第二电压时。激子吸收还提供在所选择的波长下比核心层（320）的吸收系数大得多的电压可调包层（330）。核心和电压可调谐包覆层（320,330）与第二覆层（310）组合以形成波导，其中光在第一电压状态下被限制在低损耗核心层（320），并被转移到高度在第二电压状态下的吸收电压可调谐包层（330）。在调制器（300）的优选实施例中，多个量子阱核心和包层（320,330）包括GaAs量子阱和AlGaAs屏障。核心层（320）的小的有效吸收系数和在该关闭状态下该吸收系数与电压可调谐包层（330）的吸收系数之差大的差异提供了一种以较高对比度为特征的调制器（300），同时，比常规电吸收或电折射基调制器可获得的插入损耗更小。

9. 发明授权

US07116866B2 Back-reflection reduction device 有权
标题翻译：背反射降低装置
公开(公告)号：US07116866B2
公开(公告)日：2006-10-03
申请号：US10353835
申请日：2003-01-28
申请人： Alex Harwit
发明人： Alex Harwit
IPC分类号： G02B6/32
CPC分类号： G02B6/4249 , G02B6/4204 , G02B6/4207 , G02B6/4212
摘要： The present invention is directed towards a back-reflection reduction device that is disposed between a support structure containing a plurality of optical waveguides and a bulk media. The support structure containing the optical waveguides has a substantially flat end face at which the optical waveguides terminate. Where the optical waveguides intersect the end face, they are substantially perpendicular to it. The back-reflection reduction device comprises a window disposed between the bulk media and the support structure. The window has a refractive index that is substantially identical to that of the optical waveguides. The window has an inner side that is affixed to the support structure and an opposing outer side. A gap exists between the window outer side and the bulk media. The gap provides an index of refraction substantially equal to unity.
摘要翻译：本发明涉及一种设置在包含多个光波导的支撑结构和大块介质之间的背景反射减少装置。包含光波导的支撑结构具有基本平坦的端面，光波导终止于此。当光波导与端面相交时，它们基本上垂直于其。后反射减少装置包括设置在大容量介质和支撑结构之间的窗口。窗口的折射率基本上与光波导的折射率相同。窗口具有固定到支撑结构的内侧和相对的外侧。在窗外侧和大块介质之间存在间隙。间隙提供基本上等于1的折射率。

10. 发明授权

US06867921B2 Focus-position compensator 失效
标题翻译：对焦位置补偿器
公开(公告)号：US06867921B2
公开(公告)日：2005-03-15
申请号：US10825938
申请日：2004-04-16
申请人： Alex Harwit , Paul Robb , Janusz Liberkowski
发明人： Alex Harwit , Paul Robb , Janusz Liberkowski
IPC分类号： G02B3/00 , G02B27/00 , G02B27/10
CPC分类号： G02B3/0056 , G02B27/0025
摘要： The present invention is directed towards a focus-position compensator for reducing focus variations on a microlens array. The focus-position compensator comprises a plurality of tiles that are affixed to a structure disposed between the lenslets of the microlens array and the target of the collimated light from the lenslets. Each tile refractive index and tile thickness is chosen to obtain a tile focus-position correction that will apply to a region of the microlens array.
摘要翻译：本发明涉及一种用于减少微透镜阵列上的聚焦变化的对焦位置补偿器。聚焦位置补偿器包括固定到设置在微透镜阵列的小透镜和来自小透镜的准直光的目标之间的结构的多个瓦片。选择每个瓦片折射率和瓦片厚度以获得将应用于微透镜阵列的区域的瓦片焦点位置校正。

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