公开(公告)号：EP2387167A1

公开(公告)日：2011-11-16

申请号：EP11162399.7

申请日：2011-04-14

申请人： ITT Manufacturing Enterprises, Inc.

发明人： Cunningham, James ,  Wickholm, David ,  Baber, Daniel ,  Grinch, Dean

IPC分类号： H04B10/10

CPC分类号： H04B10/112

摘要： A technique for simultaneously transmitting wide and narrow optical beacon signals includes generating a laser beam and splitting the laser beam into a first signal on a first path and a second signal on a second path via a wavelength-dependent beamsplitter. A wide beacon signal having a first beam divergence is generated from the first signal, and a narrow beacon signal having a second, lesser beam divergence is generated from the second signal. The wavelength of the laser beam determines an allocation of the laser energy between the wide and narrow beacon signals based on transmittance/reflectance characteristic of the beamsplitter at that wavelength. The wide and narrow beacon signals are simultaneously transmitted in a overlaid manner into free space to support acquisition and tracking in a free-space optical communication system. The beamsplitter can simultaneously transmit or reflect substantially all of a data signal at a different wavelength.

摘要翻译： 用于同时发送宽和窄的光信标信号的技术包括产生激光束并将激光束分裂成第一路径上的第一信号和经由波长依赖的分光器的第二路径上的第二信号。 从第一信号产生具有第一光束发散的宽信标信号，并且从第二信号产生具有第二较小光束发散的窄信标信号。 基于在该波长处的分束器的透射率/反射率特性，激光束的波长决定了宽和窄信标信号之间的激光能量的分配。 宽而窄的信标信号以重叠的方式同时传输到自由空间中，以支持在自由空间光通信系统中的采集和跟踪。 分束器可以同时发射或反射基本上所有不同波长的数据信号。

公开(公告)号：EP2385636A1

公开(公告)日：2011-11-09

申请号：EP11162398.9

申请日：2011-04-14

申请人： ITT Manufacturing Enterprises, Inc.

发明人： Cunningham, James

IPC分类号： H04B10/10

CPC分类号： H04B10/112

摘要： A technique for generating a data signal and a beacon signal for free space optical communications involves generating a data signal having a first optical wavelength and a beacon signal having a second optical wavelength. The data signal is encoded with data via modulation at a first modulation rate. The beacon signal is an inverted version of the data signal and can be further modulated at a second modulation rate that is less than the first modulation rate. The data and beacon signals are optically combined to produce a combined signal in which power attributable to the beacon signal is interleaved with and substantially non-overlapping temporally with power attributable to the data signal. The combined signal is amplified via a fiber amplifier, and the combined signal is supplied to transmitter optics for transmitting the data signal and the beacon signal into free space.

摘要翻译： 用于产生自由空间光通信的数据信号和信标信号的技术包括产生具有第一光波长的数据信号和具有第二光波长的信标信号。 以第一调制速率通过调制以数据对数据信号进行编码。 信标信号是数据信号的反向版本，并且可以以小于第一调制速率的第二调制速率进一步调制。 数据和信标信号被光学组合以产生组合信号，其中归因于信标信号的功率与时间上与归因于数据信号的功率在时间上交织和基本上不重叠。 组合的信号通过光纤放大器放大，并将组合的信号提供给发射机光学器件，用于将数据信号和信标信号传输到自由空间。

公开(公告)号：EP2398168A1

公开(公告)日：2011-12-21

申请号：EP11168685.3

申请日：2011-06-03

申请人： ITT Manufacturing Enterprises, Inc.

发明人： Wickholm, David ,  Cunningham, James

IPC分类号： H04B10/158 ,  H04B10/155

CPC分类号： H04B10/516 ,  H04B10/541 ,  H04B10/672 ,  H04B10/677

摘要： A technique for generating complementary signals for joint transmission involves generating a first signal having a first wavelength and a second signal having a second wavelength. The first signal is modulated with a first modulation to encode data, and the second signal is modulated with a second modulation, which is an inverted version of the first modulation, to encode the same data such that the first and second signals are complementary. The first and second signals are combined to produce a combined signal in which power attributable to the first signal is interleaved with and substantially non-overlapping temporally with power attributable to the second signal. The combined signal is amplified and then transmitted. The first and second signals can be optical signals at respective first and second optical wavelengths, where the first and second signals are on-off keying (OOK) modulated.

摘要翻译： 用于产生用于联合传输的互补信号的技术涉及产生具有第一波长的第一信号和具有第二波长的第二信号。 利用第一调制对第一信号进行调制以对数据进行编码，并且以第二调制（第一调制的反向版本）调制第二信号，以对相同的数据进行编码，使得第一和第二信号互补。 第一和第二信号被组合以产生组合信号，其中归因于第一信号的功率在时间上与归因于第二信号的功率在时间上交错并且基本上不重叠。 组合信号被放大然后传输。 第一和第二信号可以是在相应的第一和第二光波长处的光信号，其中第一和第二信号是开 - 关键控（OOK）调制的。