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11. 发明申请

US20080019705A1 Methods of achieving optimal communications performance 有权
标题翻译：实现最佳通信性能的方法
公开(公告)号：US20080019705A1
公开(公告)日：2008-01-24
申请号：US11649337
申请日：2007-01-03
申请人： David Caplan , Walid Atia
发明人： David Caplan , Walid Atia
IPC分类号： H04B10/06 , G01C3/08
CPC分类号： H04B10/25137 , H04B10/505 , H04B10/5051 , H04B10/508
摘要： A system includes an optical transmitter that outputs an optical signal having a substantially Gaussian waveform and an optical receiver that is optically coupled to the optical transmitter and has an impulse response essentially matching the waveform. The impulse response and waveform preferably match in the time domain. The transmitter and receiver may be average-power-limited, using, for example, an erbium-doped fiber amplifier. To achieve a high signal-to-noise ratio, the waveform may be designed to minimize jitter, sample duration, matching parasitics, and inter-symbol interference (ISI). Such a waveform may be a return-to-zero (RZ) Gaussian or Gaussian-like waveform and may be transmitted in a variety of modulation formats. Further, the system may be used in WDM or TDM systems. A method for characterizing the time domain impulse response of an optical element used in the optical receiver is provided, where the method is optionally optimized using deconvolution and/or cross-correlation techniques.
摘要翻译：一种系统包括：光发射机，其输出具有基本高斯波形的光信号和光接收器，光接收器光学耦合到光发射机并具有基本上与波形匹配的脉冲响应。脉冲响应和波形优选在时域中匹配。发射机和接收机可以是平均功率限制的，例如使用掺铒光纤放大器。为了实现高信噪比，可以设计波形以最小化抖动，采样持续时间，匹配寄生效应和符号间干扰（ISI）。这样的波形可以是归零（RZ）高斯或类似高斯波形的波形，并且可以以各种调制格式发送。此外，该系统可以在WDM或TDM系统中使用。提供了一种用于表征在光接收机中使用的光学元件的时域脉冲响应的方法，其中该方法可选地使用去卷积和/或互相关技术优化。

12. 发明申请

US20070216988A1 Multi-channel differentially encoded phase shift keyed receivers 有权
标题翻译：多通道差分编码相移键控接收器
公开(公告)号：US20070216988A1
公开(公告)日：2007-09-20
申请号：US11715670
申请日：2007-03-08
申请人： David Caplan
发明人： David Caplan
IPC分类号： G02F2/00
CPC分类号： H04J14/02 , H04B10/677
摘要： An optical, multi-channel, Differential Phase Shift Keying (DPSK) receiver demodulates multiple Wavelength Division Multiplexed (WDM) channels using at least one interferometer. This distributes expense of the interferometer(s) over all channels of an optical signal, allowing for deployment of cost-effective, scalable, wideband, WDM DPSK systems. For example, for an 80 channel WDM link, the receiver uses a single interferometer instead of eighty interferometers and associated stabilization hardware, dramatically reducing size, weight, power, and cost. The receiver is architecturally compatible with existing interferometer technologies so previous development and qualification efforts can be leveraged. This allows for expedited technology insertion into existing optical communications networks, including terrestrial and space-based optical networks.
摘要翻译：光学多通道差分相移键控（DPSK）接收机使用至少一个干涉仪解调多个波分复用（WDM）信道。这将干涉仪的费用分配到光信号的所有信道上，从而允许部署成本效益高，可扩展的宽带WDM DPSK系统。例如，对于80通道WDM链路，接收机使用单个干涉仪而不是八十个干涉仪和相关的稳定硬件，大大减小了尺寸，重量，功率和成本。接收机在架构上与现有的干涉仪技术相兼容，因此可以利用以前的开发和资格认证工作。这允许将加速技术插入现有的光通信网络，包括地面和基于空间的光网络。

13. 发明申请

US20060274320A1 Reconfigurable polarization independent interferometers and methods of stabilization 有权
标题翻译：可重构偏振独立干涉仪和稳定方法
公开(公告)号：US20060274320A1
公开(公告)日：2006-12-07
申请号：US11318255
申请日：2005-12-23
申请人： David Caplan
发明人： David Caplan
IPC分类号： G01B9/02
CPC分类号： H04B10/69 , G02B6/2726 , G02B6/2766 , G02B6/2861 , G02B6/29302 , G02B6/29349 , G02B6/29395 , G02B6/29397 , G02F1/09 , G02F1/225 , H04B10/66 , H04B10/677
摘要： A polarization independent (PI) interferometer design that can be built from standard optical components is described. Based upon a Michelson interferometer, the PI interferometer uses a 50/50 splitter and Faraday Rotator Mirrors (FM's). The interferometer achieves good optical characteristics, such as high extinction ratio (ER) and low insertion loss (IL). Lack of polarization sensitivity reduces interferometer construction tolerances and cost, enhances performance and utility, and expands the scope of interferometric based devices. Such characteristics can be used to construct flexible, high performance, polarization insensitive, multi-rate, self-calibrating, optical DPSK receivers, power combiners, optical filters and interleavers, all-optical switches, and cascaded interferometers. Since polarization is not maintained in standard fiber optic networks, a PI-DPSK receiver allows for use of more sensitive DPSK communications over fiber, without need for costly polarization control hardware. Other applications of PI interferometers include optical CDMA, secure communications, optical coherence tomography (OCT), and temporal gratings with ultra-precise timing.
摘要翻译：描述了可以从标准光学部件构建的偏振无关（PI）干涉仪设计。基于迈克尔逊干涉仪，PI干涉仪使用50/50分光镜和法拉第旋转镜（FM）。干涉仪实现了高消光比（ER）和低插入损耗（IL）等良好的光学特性。偏振灵敏度的缺乏降低了干涉仪的结构公差和成本，提高了性能和效用，并扩展了基于干涉仪的器件的范围。这种特性可用于构建灵活，高性能，偏振不敏感，多速率，自校准，光学DPSK接收器，功率组合器，滤光器和交织器，全光开关和级联干涉仪。由于在标准光纤网络中不保持极化，因此PI-DPSK接收器允许在光纤上使用更敏感的DPSK通信，而不需要昂贵的偏振控制硬件。 PI干涉仪的其他应用包括光CDMA，安全通信，光学相干断层扫描（OCT）和具有超精确定时的时间光栅。

14. 发明申请

US20060139735A1 MULTI-CHANNEL DPSK RECEIVER 有权
标题翻译：多通道DPSK接收器
公开(公告)号：US20060139735A1
公开(公告)日：2006-06-29
申请号：US11022344
申请日：2004-12-23
申请人： David Caplan
发明人： David Caplan
IPC分类号： G02F2/00
CPC分类号： H04J14/02 , H04B10/67 , H04B10/677 , H04B10/69
摘要： An optical, multi-channel, Differential Phase Shift Keying (DPSK) receiver demodulates multiple Wavelength Division Multiplexed (WDM) channels using a single interferometer. This distributes expense of the interferometer over all channels of an optical signal, allowing for deployment of cost-effective, scalable, wideband, WDM DPSK systems. For example, for an 80 channel WDM link, the receiver uses a single interferometer instead of eighty interferometers and associated stabilization hardware, dramatically reducing size, weight, power, and cost. The receiver is architecturally compatible with existing interferometer technologies so previous development and qualification efforts can be leveraged. This allows for expedited technology insertion into existing optical communications networks, including terrestrial and space-based optical networks.
摘要翻译：光学多通道差分相移键控（DPSK）接收机使用单个干涉仪解调多个波分复用（WDM）信道。这将干涉仪的费用在光信号的所有信道上分配，允许部署具有成本效益，可扩展的宽带WDM DPSK系统。例如，对于80通道WDM链路，接收机使用单个干涉仪而不是八十个干涉仪和相关的稳定硬件，大大减小了尺寸，重量，功率和成本。接收机在架构上与现有的干涉仪技术相兼容，因此可以利用以前的开发和资格认证工作。这允许将加速技术插入现有的光通信网络，包括地面和基于空间的光网络。

15. 发明申请

US20050029207A1 Bar code reader for a compact disc rack 审中-公开
公开(公告)号：US20050029207A1
公开(公告)日：2005-02-10
申请号：US10943678
申请日：2004-09-17
申请人： David Caplan , Charles Taylor
发明人： David Caplan , Charles Taylor
IPC分类号： A47B49/00 , A47B63/06 , A47B81/06 , G11B33/04 , A47G29/00
CPC分类号： A47B81/068 , A47B49/002 , A47B63/065 , G11B33/0466 , G11B33/0483
摘要： A high capacity motorized rack holds a plurality of jewel case enclosed CDs in holders flexibly inter-connectable with each other to form a rotatable continuous loop. The loop is rotatably retained within a vertical rack housing and is driven by a motor, disposed within the housing, under user control such that the loop is rotated until a desired CD is moved to the top region of the belt. A rack may hold two or more such loops of inter-connected holders. In one embodiment a holder retains a single jewel case, and comprises two independent loops that are rotated with a single motor. A preferred embodiment employs inter-connectable holders that each retain two jewel cases in a side-by-side configuration. A lamp and/or barcode scanner may be disposed on the housing for ease of CD selection. The housing base preferably is detached during shipping to permit transporting the rack in a smaller volume container. User control can include voice commands to direct loop rotation and speed.

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