公开(公告)号：US07411726B2

公开(公告)日：2008-08-12

申请号：US11715670

申请日：2007-03-08

申请人： David O. Caplan

发明人： David O. Caplan

IPC分类号： G02F2/00 ,  H04B10/06 ,  H04B10/00 ,  G02F1/00 ,  H01S3/00 ,  H04J14/00 ,  H04J14/02

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，从而显着减小尺寸，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。

公开(公告)号：US07233430B2

公开(公告)日：2007-06-19

申请号：US11022344

申请日：2004-12-23

申请人： David O. Caplan

发明人： David O. Caplan

IPC分类号： G02F2/00 ,  H04B10/06 ,  G02F1/00 ,  H01S3/00 ,  H04B10/00 ,  H04J14/00 ,  H04J14/02

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。

公开(公告)号：US09264147B2

公开(公告)日：2016-02-16

申请号：US13071460

申请日：2011-03-24

申请人： David O. Caplan ,  Neal W. Spellmeyer ,  Bryan S. Robinson ,  Scott A. Hamilton ,  Don M. Boroson ,  Hemonth G. Rao ,  Marc C. Norvig

发明人： David O. Caplan ,  Neal W. Spellmeyer ,  Bryan S. Robinson ,  Scott A. Hamilton ,  Don M. Boroson ,  Hemonth G. Rao ,  Marc C. Norvig

IPC分类号： H04B10/00 ,  H04B10/67 ,  H04B10/556 ,  H04L27/20 ,  H04L27/22 ,  H04L27/26

CPC分类号： E21B49/00 ,  E21B47/0002 ,  G01V1/40 ,  H04B10/5561 ,  H04B10/677 ,  H04L27/2075 ,  H04L27/2096 ,  H04L27/223 ,  H04L27/2601

摘要： A burst-mode phase shift keying (PSK) communications system according to an embodiment of the present invention enables practical, power-efficient, multi-rate communications between an optical transmitter and receiver. Embodiments may operate on differential PSK (DPSK) signals. An embodiment of the system utilizes a single interferometer in the receiver with a relative path delay that is matched to the DPSK symbol rate of the link. DPSK symbols are transmitted in bursts, and the data rate may be varied by changing the ratio of the burst-on time to the burst-off time. This approach offers a number of advantages over conventional DPSK implementations, including near-optimum photon efficiency over a wide range of data rates, simplified multi-rate transceiver implementation, and relaxed transmit laser line-width requirements at low data rates.

摘要翻译： 根据本发明的实施例的突发模式相移键控（PSK）通信系统使得光发射机和接收机之间的实际的，功率高效的多速率通信成为可能。 实施例可以在差分PSK（DPSK）信号上操作。 该系统的一个实施例利用与该链路的DPSK符号率匹配的相对路径延迟的接收机中的单个干涉仪。 DPSK符号以突发方式发送，并且可以通过改变突发打开时间与突发关闭时间的比率来改变数据速率。 与传统的DPSK实现相比，这种方法提供了许多优点，包括在宽范围的数据速率下的近最佳光子效率，简化的多速率收发器实现，以及在低数据速率下宽松的发射激光线宽要求。

公开(公告)号：US08503889B2

公开(公告)日：2013-08-06

申请号：US12532560

申请日：2008-03-24

申请人： David O. Caplan ,  Mark L. Stevens

发明人： David O. Caplan ,  Mark L. Stevens

IPC分类号： H04B10/06 ,  H04B10/12 ,  H04J14/02

CPC分类号： H04B10/677

摘要： A filter-based method of demodulating differentially encoded phase shift keyed (DPSK) optical signals, such as commonly used binary-DPSK (DBDPSK) and quadrature DPSK (DQPSK) signals, that can achieve optimal receiver sensitivity is described. This approach, which combines filtering and differential phase comparison, can reduce the complexity and cost of DPSK receivers by obviating delay-line interferometer-based demodulation. This can improve receiver stability and reduce size, weight, and power, while maintaining the ability to achieve optimal communications performance.

摘要翻译： 描述了一种基于滤波器的解调差分编码的相移键控（DPSK）光信号，例如可以实现最佳接收机灵敏度的常用二进制DPSK（DBDPSK）和正交DPSK（DQPSK）信号。 这种组合滤波和差分相位比较的方法可以通过消除基于延迟线干涉仪的解调来降低DPSK接收机的复杂性和成本。 这可以提高接收机的稳定性并减小尺寸，重量和功率，同时保持实现最佳通信性能的能力。

公开(公告)号：US20120063788A1

公开(公告)日：2012-03-15

申请号：US13302664

申请日：2011-11-22

申请人： David O. Caplan

发明人： David O. Caplan

IPC分类号： H04B10/04

CPC分类号： H04B10/504 ,  H04B10/564

摘要： The present invention addresses the problem of transmitting optical signals with high extinction ratios using low-power drive signals. At present, low-power optical transmitters typically operate with modulation extinction ratios of, at best, about 10 dB. Embodiments of the present invention may achieve extinction ratios exceeding 20 dB using low-power drive signals of under 20 mW at data rates on the order of Gbits/sec. In addition, the modulation may be achieved with both low-power and low-fidelity drive waveforms, enabling conventional and often noisy high-speed, low-power electronics to generate high-extinction, high-fidelity optical waveforms.

摘要翻译： 本发明解决了使用低功率驱动信号传输具有高消光比的光信号的问题。 目前，低功率光发射机通常以最大约10dB的调制消光比工作。 本发明的实施例可以使用低于20mW的低功率驱动信号，以Gbits / sec量级的数据速率实现超过20dB的消光比。 此外，可以通过低功耗和低保真驱动波形来实现调制，从而使传统的和经常嘈杂的高速，低功率电子产生高消光，高保真的光波形。

公开(公告)号：US07414728B2

公开(公告)日：2008-08-19

申请号：US11318255

申请日：2005-12-23

申请人： David O. Caplan

发明人： David O. 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。

公开(公告)号：US06831779B2

公开(公告)日：2004-12-14

申请号：US09845053

申请日：2001-04-27

申请人： David O. Caplan

发明人： David O. Caplan

IPC分类号： H01S300

CPC分类号： H01S3/06754 ,  H01S3/06712 ,  H01S3/094011 ,  H01S3/09408 ,  H01S3/094096 ,  H01S3/10023 ,  H01S3/1608 ,  H01S3/2333 ,  H01S2301/04

摘要： A high-gain, saturated output, double-pass, fault-tolerant optical amplifier has an extended range of stability, output power, and efficiency and fall back modes of operation. The optical amplifier is typically configured in a two-stage polarization maintaining configuration, employing erbium-doped fibers as the gain media in both of the stages. At least one optical element in a loss-insensitive region of the amplifier can have a loss substantially higher than optical elements in the gain paths outside of the loss-insensitive region without substantially reducing the overall output power and efficiency of the amplifier. These elements can influence the amplified signal waveform, spectrum, signal-to-noise ratio, or subsequent performance in an optical network, as well as amplifier characteristics, such as output power, stability, efficiency, and reliability. The optical amplifier is suitable for both free-space and fiber optic network applications.

摘要翻译： 高增益，饱和输出，双通道，容错光放大器具有扩展的稳定性，输出功率和效率范围以及后退操作模式。 通常将光放大器配置为两级偏振保持配置，在这两个阶段中采用掺铒光纤作为增益介质。 在放大器的损耗不敏感区域中的至少一个光学元件可以具有显着高于损耗不敏感区域之外的增益路径中的光学元件的损耗，而不会显着降低放大器的整体输出功率和效率。 这些元件可以影响光网络中放大的信号波形，频谱，信噪比或随后的性能，以及放大器特性，如输出功率，稳定性，效率和可靠性。 光放大器适用于自由空间和光纤网络应用。

公开(公告)号：US06694104B1

公开(公告)日：2004-02-17

申请号：US09261628

申请日：1999-03-03

申请人： David O. Caplan ,  Mark L. Stevens ,  Don M. Boroson

发明人： David O. Caplan ,  Mark L. Stevens ,  Don M. Boroson

IPC分类号： H04B1004

CPC分类号： H04L1/0002 ,  H04B10/505

摘要： A variable-bit-rate communication system is described. The communication system includes a variable-bit-rate transmitter that generates digital data at a first or a second bit rate and a variable-bit-rate receiver that receives the digital data. The digital data comprises a sequence of signaling waveforms having a first or a second duty cycle, respectively, wherein each signaling waveform has the same shape.

摘要翻译： 描述了可变比特率通信系统。 通信系统包括以第一或第二比特率生成数字数据的可变比特率发射机和接收数字数据的可变比特率接收机。 数字数据包括分别具有第一或第二占空比的信令波形序列，其中每个信令波形具有相同的形状。