专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明申请

US20100054490A1 Audio Noise Cancellation System 审中-公开
标题翻译：音频噪声消除系统
公开(公告)号：US20100054490A1
公开(公告)日：2010-03-04
申请号：US12201853
申请日：2008-08-29
申请人： Aref Chowdhury
发明人： Aref Chowdhury
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/106 , G10K2210/128 , G10K2210/3221
摘要： System including signal processor in communication with sound detector and with sound-emitting device. Sound detector and sound-emitting device are in audio communication with occupant compartment. Signal processor is configured for receiving input signal from sound detector being indicative of background audio noise in occupant compartment, and for causing sound-emitting device to emit output sound that partially cancels background audio noise in manner responsive to received input signal. Another system, including array of sound detectors and array of sound-emitting devices. Method includes providing signal processor in communication with sound detector and sound-emitting device, where sound detector and sound-emitting device are in communication with occupant compartment. Further in method, signal processor is caused to receive input signal from sound detector being indicative of background audio noise in occupant compartment. Additionally in method, signal processor is induced to cause sound-emitting device to emit output sound that partially cancels background audio noise in manner responsive to received input signal.
摘要翻译：系统包括与声音检测器和声发射设备通信的信号处理器。声音探测器和发声装置与乘员隔间进行音频通信。信号处理器被配置为从声音检测器接收指示乘员舱内的背景音频噪声的输入信号，并且用于使声发射设备以响应于接收的输入信号的方式发出部分地抵消背景音频噪声的输出声音。另一个系统，包括声音检测器阵列和声发射设备阵列。方法包括提供与声音检测器和发声装置通信的信号处理器，其中声音检测器和发声装置与乘员隔间通信。另外，在方法中，使得信号处理器从声音检测器接收指示乘员舱内的背景音频噪声的输入信号。另外，在方法中，感应信号处理器使声发射装置以响应于接收到的输入信号的方式发出部分地抵消背景音频噪声的输出声音。

42. 发明申请

US20100053763A1 Chirped Metamaterials 有权
标题翻译：啁啾超材料
公开(公告)号：US20100053763A1
公开(公告)日：2010-03-04
申请号：US12229866
申请日：2008-08-27
申请人： Aref Chowdhury , Philip Moss Platzman
发明人： Aref Chowdhury , Philip Moss Platzman
IPC分类号： G02B1/00
CPC分类号： B82Y20/00 , G02B1/002 , G02B6/1225 , G02B2006/12147 , G02F1/353 , G02F2202/30 , H01Q15/0026 , H01Q15/0086
摘要： An apparatus includes a medium that is a metamaterial over a frequency range. The medium includes a stack of layers or slabs. A mechanical, electrical, or magnetic property of the layers or slabs of the stack varies monotonically between neighboring ones of the layers or slabs.
摘要翻译：一种装置包括在频率范围上是超材料的介质。介质包括一叠层或板。堆叠的层或板的机械，电或或磁性质在相邻的层或板之间单调地变化。

43. 发明申请

US20090173886A1 Cloaking device detection system 有权
标题翻译：隐蔽装置检测系统
公开(公告)号：US20090173886A1
公开(公告)日：2009-07-09
申请号：US12006529
申请日：2008-01-03
申请人： Aref Chowdhury
发明人： Aref Chowdhury
IPC分类号： G01J1/42
CPC分类号： G01S13/04 , G01S7/41
摘要： System including electromagnetic radiation source and electromagnetic radiation detector. Electromagnetic radiation source is configured to excite, with electromagnetic radiation having first source frequency, object configured for suppressing responsive emission of electromagnetic radiation having first source frequency. Electromagnetic radiation detector is configured to receive responsive emission of electromagnetic radiation from object. System is configured to detect presence of object. Method includes exciting, with electromagnetic radiation having first source frequency, object configured for suppressing responsive emission of electromagnetic radiation having first source frequency. Method includes receiving responsive emission of electromagnetic radiation from object and utilizing responsive emission to detect presence of object.
摘要翻译：系统包括电磁辐射源和电磁辐射探测器。电磁辐射源被配置为通过具有第一源频率的电磁辐射来激发被配置用于抑制具有第一源频率的电磁辐射的响应发射的物体。电磁辐射检测器被配置为接收来自物体的电磁辐射的响应发射。系统被配置为检测对象的存在。方法包括激励，具有第一源频率的电磁辐射，被配置用于抑制具有第一源频率的电磁辐射的响应发射的物体。方法包括从物体接收电磁辐射的响应发射并利用响应发射来检测物体的存在。

44. 发明授权

US07454144B2 Low total excursion dispersion maps 失效
标题翻译：低总偏移色散图
公开(公告)号：US07454144B2
公开(公告)日：2008-11-18
申请号：US11844940
申请日：2007-08-24
申请人： Aref Chowdhury , Rene′-Jean Essiambre , Lisa Kathleen Wickham
发明人： Aref Chowdhury , Rene′-Jean Essiambre , Lisa Kathleen Wickham
IPC分类号： H04B10/00
CPC分类号： H04B10/25253
摘要： A process optically transports digital data over an all-optical long-haul communication path. The process includes transporting digital optical data signals at a selected bit rate and a selected wavelength over a sequence of transmission spans. The sequence includes 70 percent or more of the spans of the long-haul all-optical communication path. Each span of the sequence has a primary local maximum optical power point for the wavelength on a transmission fiber and nearest to an input of the span. The transporting causes a cumulative dispersion of each signal to evolve such that residual dispersions per span are positive over some of the spans and are negative over other of the spans. At the primary local maximum power points, magnitudes of cumulative dispersions of the signals in pico seconds per nanometer remain at less than 32,000 times the inverse of the bit rate in giga bits per second.
摘要翻译：一种过程通过全光学长途通信路径光学传输数字数据。该过程包括以选定的比特率传送数字光学数据信号，并在一系列传输跨度上传输选定的波长。该序列包括长距离全光通信路径的70％或更多的跨度。序列的每个跨度具有用于传输光纤上的波长并且最接近跨度的输入的主要局部最大光功率点。运输导致每个信号的累积色散发展使得每跨度的每个跨度的残余分散是正的，并且在其它跨度上是负的。在主要局部最大功率点，信号的累积分散幅度以微微秒/纳米为单位，保持在小于每秒百兆比特比特率的倒数的32,000倍。

45. 发明授权

US07433117B2 Polarization-diverse optical amplification 有权
标题翻译：极化多样的光学放大
公开(公告)号：US07433117B2
公开(公告)日：2008-10-07
申请号：US11412018
申请日：2006-04-26
申请人： Aref Chowdhury , Christopher Richard Doerr , Gregory Raybon
发明人： Aref Chowdhury , Christopher Richard Doerr , Gregory Raybon
IPC分类号： H01S3/00 , G02B6/00
CPC分类号： H01S5/5009 , H01S3/06712 , H01S3/10007 , H01S3/10023 , H01S3/1301 , H01S3/2308
摘要： A polarization-diverse optical amplifier includes a polarization-sensitive optically active medium and a polarization splitter. The polarization splitter is configured to receive input light, to direct a first polarization component of the received input light to a first optical path segment, and to direct a second polarization component of the received input light to a separate second optical path segment. The active medium has first and second optical ports. The first optical port is at an end of the first optical path segment. The second port is at an end of the second optical path segment. The active medium outputs amplified light from one of the ports in response to receiving the input light at the other of the ports. In a preferred embodiment, the active medium has an internal optical axis, and the polarizations of the first and second components are oriented relative to that axis so that amplification is enhanced. The two optical path segments may include polarization-maintaining optical waveguides.
摘要翻译：偏振分集光放大器包括偏振光敏光学介质和偏振分光器。偏振分离器被配置为接收输入光，以将接收的输入光的第一偏振分量引导到第一光路段，并将接收的输入光的第二偏振分量引导到单独的第二光路段。活动介质具有第一和第二光学端口。第一光口位于第一光路段的一端。第二端口处于第二光路段的一端。响应于在另一个端口处接收输入光，有源介质从一个端口输出放大的光。在优选实施例中，活性介质具有内部光轴，并且第一和第二组分的极化相对于该轴取向，从而增强了放大。两个光路段可以包括偏振保持光波导。

46. 发明申请

US20070253055A1 Polarization-diverse optical amplification 有权
标题翻译：极化多样的光学放大
公开(公告)号：US20070253055A1
公开(公告)日：2007-11-01
申请号：US11412018
申请日：2006-04-26
申请人： Aref Chowdhury , Christopher Doerr , Gregory Raybon
发明人： Aref Chowdhury , Christopher Doerr , Gregory Raybon
IPC分类号： H01S3/00
CPC分类号： H01S5/5009 , H01S3/06712 , H01S3/10007 , H01S3/10023 , H01S3/1301 , H01S3/2308
摘要： A polarization-diverse optical amplifier includes a polarization-sensitive optically active medium and a polarization splitter. The polarization splitter is configured to receive input light, to direct a first polarization component of the received input light to a first optical path segment, and to direct a second polarization component of the received input light to a separate second optical path segment. The active medium has first and second optical ports. The first optical port is at an end of the first optical path segment. The second port is at an end of the second optical path segment. The active medium outputs amplified light from one of the ports in response to receiving the input light at the other of the ports. In a preferred embodiment, the active medium has an internal optical axis, and the polarizations of the first and second components are oriented relative to that axis so that amplification is enhanced. The two optical path segments may include polarization-maintaining optical waveguides.
摘要翻译：偏振分集光放大器包括偏振光敏光学介质和偏振分光器。偏振分离器被配置为接收输入光，以将接收的输入光的第一偏振分量引导到第一光路段，并将接收的输入光的第二偏振分量引导到单独的第二光路段。活动介质具有第一和第二光学端口。第一光口位于第一光路段的一端。第二端口处于第二光路段的一端。响应于在另一个端口处接收输入光，有源介质从一个端口输出放大的光。在优选实施例中，活性介质具有内部光轴，并且第一和第二组分的极化相对于该轴取向，从而增强了放大。两个光路段可以包括偏振保持光波导。

47. 发明申请

US20060210993A1 DNA structures on ferroelectrics and semiconductors 有权
公开(公告)号：US20060210993A1
公开(公告)日：2006-09-21
申请号：US11064907
申请日：2005-02-23
申请人： Aref Chowdhury , Hock Ng , Bernard Yurke
发明人： Aref Chowdhury , Hock Ng , Bernard Yurke
IPC分类号： C12Q1/68 , C12M1/34
CPC分类号： G02B6/124 , B82Y10/00 , B82Y15/00 , B82Y20/00 , G01N33/553 , G01N33/588
摘要： An apparatus includes a substrate and a plurality of DNA oligomers in contact with a top surface of the substrate. The substrate is a polar ferroelectric or a polar compound semiconductor.

48. 发明授权

US07079714B2 Electro-optic devices having flattened frequency response with reduced drive voltage 有权
标题翻译：具有降低的驱动电压的具有平坦的频率响应的电光器件
公开(公告)号：US07079714B2
公开(公告)日：2006-07-18
申请号：US10631649
申请日：2003-07-31
申请人： Aref Chowdhury , Douglas M. Gill , Mark Lee
发明人： Aref Chowdhury , Douglas M. Gill , Mark Lee
IPC分类号： G02F1/035
CPC分类号： G02F1/2255 , G02F2201/12
摘要： The present invention is an improved electro-optical device comprising a substrate-supported layer of electro-optical material disposed between upper and lower electrodes. Conventional practice has been to make the electrodes thick to minimize electrical loss. Applicants, in contrast, have discovered that the performance of the device can be improved by making the electrodes thin—typically about 2 microns or less and preferably about 0.5 micron or less. While the thin electrodes take a relatively large loss penalty at low frequencies, at higher frequencies the thin electrodes provide a relatively low loss, thus producing a flattened frequency response as compared with thick electrode devices. The device can maintain a wide operating bandwidth at frequencies of interest for optical transmission while reducing the required drive voltage.
摘要翻译：本发明是一种改进的电光装置，其包括设置在上电极和下电极之间的电光材料的基片支撑层。传统的做法是使电极变厚以最小化电损耗。相比之下，申请人已经发现，可以通过使电极变薄 - 通常约2微米或更小，优选约0.5微米或更小来提高器件的性能。虽然薄电极在低频下具有相对较大的损耗损失，但是在较高频率下，薄电极提供相对较低的损耗，从而与厚电极器件相比产生平坦化的频率响应。该设备可以在减少所需的驱动电压的同时，在光学传输的频率下维持宽的工作带宽。

49. 发明申请

US20060045541A1 Asymmetric long-haul transmission paths with optical phase conjugation 有权
公开(公告)号：US20060045541A1
公开(公告)日：2006-03-02
申请号：US10932980
申请日：2004-09-02
申请人： Aref Chowdhury , Rene-Jean Essiambre , Gregory Raybon
发明人： Aref Chowdhury , Rene-Jean Essiambre , Gregory Raybon
IPC分类号： H04B10/04
CPC分类号： H04B10/2531
摘要： An apparatus includes a non-solitonic all-optical communication path having serially connected first and second segments. The first segment end-couples to a lumped optical transmitter. The second segment end-couples to a lumped optical receiver. Each segment has a series of spans of transmission optical fibers. The all-optical communication path has an optical phase conjugator that optically end-couples the first segment to the second segment. The optical phase conjugator is positioned away from the path's midpoint.

50. 发明申请

US20050269593A1 Group III-nitride layers with patterned surfaces 有权
标题翻译：具有图案化表面的III族氮化物层
公开(公告)号：US20050269593A1
公开(公告)日：2005-12-08
申请号：US11180350
申请日：2005-07-13
申请人： Aref Chowdhury , Hock Ng , Richart Slusher
发明人： Aref Chowdhury , Hock Ng , Richart Slusher
IPC分类号： H01L21/205 , B81B1/00 , G02B6/122 , H01J1/30 , H01J1/304 , H01J9/02 , H01L21/306 , H01L29/24
CPC分类号： B82Y20/00 , B81B1/00 , G02B6/1225 , G02B2006/12035 , H01J1/304 , H01J3/022 , H01J9/025 , H01L21/0254 , H01L21/02639 , H01L21/30612
摘要： A fabrication method produces a mechanically patterned layer of group III-nitride. The method includes providing a crystalline substrate and forming a first layer of a first group III-nitride on a planar surface of the substrate. The first layer has a single polarity and also has a pattern of holes or trenches that expose a portion of the substrate. The method includes then, epitaxially growing a second layer of a second group III-nitride over the first layer and the exposed portion of substrate. The first and second group III-nitrides have different alloy compositions. The method also includes subjecting the second layer to an aqueous solution of base to mechanically pattern the second layer.
摘要翻译：制造方法产生III族氮化物的机械图案化层。该方法包括提供晶体衬底并在衬底的平坦表面上形成第一III族氮化物的第一层。第一层具有单一极性，并且还具有露出基板的一部分的孔或沟槽的图案。该方法包括在第一层和衬底的暴露部分上外延生长第二III族氮化物层的第二层。第一和第二III族氮化物具有不同的合金组成。该方法还包括使第二层经受基底水溶液以机械地图形化第二层。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式