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1. 发明申请

WO2019089148A1 LINEAR FM CHIRP WAVEFORM FOR A LADAR TRANSCEIVER 审中-公开
公开(公告)号：WO2019089148A1
公开(公告)日：2019-05-09
申请号：PCT/US2018/051906
申请日：2018-09-20
申请人： RAYTHEON COMPANY
发明人： HALMOS, Maurice, J.
IPC分类号： G01S17/10 , G01S7/484
CPC分类号： G01S7/4911 , G01S7/4815 , G01S7/484 , G01S17/102 , G01S17/32 , H04B10/40 , H04B2210/516
摘要： Methods and systems for generating a high bandwidth linear FM chirp for a laser detection and ranging (LADAR) transceiver is described herein. The LADAR transceiver includes an array of laser sources 302 configured to generate a series of pulses with each pulse offset in frequency by a respective frequency offset from a previous pulse and a subsequent pulse in the series of pulses. A ladder signal 304 is generated from the series of pulses and modulated with a modulation signal 314 having a modulation bandwidth corresponding to the frequency offset between each pulse to generate the linear chirp signal 324. The linear chirp signal 324 has a chirp bandwidth corresponding to the number of laser sources in the array 302 and a modulation bandwidth of the modulation signal. The ladder signal 304 includes a plurality of steps, S1, S2, S3, S4, S5. Each of steps S1, S2, S3, S4, S5 corresponds to a pulse in the series of pulses generated by array 302. Each of steps, S1, S2, S3, S4, S5 are separated by a frequency offset X1, X2, X3, X4. The modulation bandwidth is approximately equal to the frequency offsets X1, X2, X3, X4 between each of steps S1, S2, S3, S4, S5. The modulation signal 314 may be provided as a sawtooth linear FM chirp. The modulation signal 314 is synchronized with ladder signal 304 such that the result of the modulation produces linear chirp signal 324 (e.g., contiguous single linear chirp ramp). Thus, a linear chirp signal 324 having a high bandwidth can be generated using a modulation bandwidth that is reduced or less than the chirp bandwidth of linear chirp signal 324. For example, in one embodiment, linear chirp signal 324 can be generated having a chirp bandwidth of 20 GHz using an array having 10 laser sources and a modulation signal having a modulation bandwidth of 2 GHz.

2. 发明申请

WO2005084268A3 FM SOURCE AND SPECTRAL RESHAPING ELEMENT 审中-公开
标题翻译： FM源和光谱恢复元件
公开(公告)号：WO2005084268A3
公开(公告)日：2007-02-01
申请号：PCT/US2005006412
申请日：2005-02-28
申请人： AZNA LLC
发明人： MAHGEREFTEH DANIEL , MATSUI YASUHIRO , ZHENG XUEYAN , JOHNSON BART , WALKER DUNCAN , TAYEBATI PARVIZ
IPC分类号： G02B6/12 , H04B10/2513 , H04B10/50
CPC分类号： H04B10/25137 , H04B10/504 , H04B10/505 , H04B10/5161 , H04B2210/516
摘要： A fiber optic communication system comprising: an optical signal source adapted to receive a base binary signal and produce a first frequency modulated signal, and an optical spectrum reshaper or an amplitude modulator adapted to reshape the first signal into a second amplitude and frequency modulated; characterized in that: the frequency characteristics of said first signal, and the optical characteristics of said optical spectrum reshaper, being such that the frequency characteristics of said second signal are configured so as to increase the tolerance of the second signal to dispersion in a transmission fiber. In another form of the present invention, there is provided a method for transmitting a base signal, comprising: using the base signal to produce a frequency modulated signal; and providing an amplitude modulator for receiving the frequency modulated signal and for generating an amplitude and frequency modulated signal.
摘要翻译：一种光纤通信系统，包括：适于接收基本二进制信号并产生第一频率调制信号的光信号源，以及适于将第一信号重新形成第二幅度和频率调制的光谱整形器或幅度调制器; 其特征在于：所述第一信号的频率特性和所述光谱整形器的光学特性使得所述第二信号的频率特性被配置为增加第二信号对传输光纤中色散的容差。在本发明的另一形式中，提供了一种用于发送基本信号的方法，包括：使用所述基本信号产生调频信号; 以及提供一个幅度调制器，用于接收频率调制信号并产生幅度和频率调制信号。

3. 发明申请

WO2016051410A1 ALL-OPTICAL SILICON-PHOTONIC CONSTELLATION CONVERSION OF AMPLITUDE-PHASE MODULATION FORMATS 审中-公开
标题翻译：全光子相位调制格式的全光子光子智能转换
公开(公告)号：WO2016051410A1
公开(公告)日：2016-04-07
申请号：PCT/IL2015/050984
申请日：2015-10-01
申请人： B.G. NEGEV TECHNOLOGIES AND APPLICATIONS LTD., AT BEN-GURION UNIVERSITY , BAR-ILAN UNIVERSITY
发明人： SADOT, Dan , ZALEVSKY, Zeev , YEMINY, Tomer
IPC分类号： H04B10/00
CPC分类号： H04B10/615 , H04B10/291 , H04B10/5161 , H04B10/54 , H04B10/541 , H04B10/548 , H04B10/5561 , H04B10/612 , H04B2210/516 , H04L25/03165
摘要： A method for performing optical constellation conversion, according to which each received symbol from a constellation of input symbols is optically split into M components and each component is multiplied by a first predetermined different complex weighing factor, to achieve M firstly weighted components with different amplitudes. Then a nonlinear processor optically performs a nonlinear transform on each M firstly weighted components, so as to obtain M outputs which are linearly independent, Finally, a linear processor optically performs a linear transform to obtain a new converted constellation by optically multiplying, in the complex plane, each of the M outputs by a second predetermined different complex weighing factor, to achieve M secondly weighted components and then summing the M secondly weighted components.
摘要翻译：一种用于执行光学星座图转换的方法，根据该方法，从输入符号的星座中的每个接收到的符号被光学分割成M个分量，并且每个分量乘以第一预定的不同复加权因子，以实现具有不同幅度的M个第一加权分量。然后，非线性处理器对每个M个第一加权分量进行光学执行非线性变换，以获得线性独立的M个输出。最后，线性处理器光学地执行线性变换以通过光学乘法来获得新的转换星座平面，每个M个输出通过第二预定的不同的复加权因子，以实现M个二次加权的分量，然后对M个第二加权分量求和。

4. 发明申请

WO2005084268A2 OPTICAL SYSTEM COMPRISING AN FM SOURCE AND A SPECTRAL RESHAPING ELEMENT 审中-公开
标题翻译：包含FM源和光谱重构元件的光学系统
公开(公告)号：WO2005084268A2
公开(公告)日：2005-09-15
申请号：PCT/US2005/006412
申请日：2005-02-28
申请人： AZNA LLC
发明人： MAHGEREFTEH, Daniel , MATSUI, Yasuhiro , ZHENG, Xueyan , JOHNSON, Bart , WALKER, Duncan , TAYEBATI, Parviz
IPC分类号： G02B6/12 , H04B10/2513 , H04B10/50
CPC分类号： H04B10/25137 , H04B10/504 , H04B10/505 , H04B10/5161 , H04B2210/516
摘要： In one form of the present invention, there is provided a fiber optic communication system comprising: an optical signal source adapted to receive a base binary signal and produce a first signal, said first signal being frequency modulated; and an optical spectrum reshaper adapted to reshape the first signal into a second signal, said second signal being amplitude modulated and frequency modulated; characterized in that: the frequency characteristics of said first signal, and the optical characteristics of said optical spectrum reshaper, being such that the frequency characteristics of said second signal are configured so as to increase the tolerance of the second signal to dispersion in a transmission fiber. In another form of the present invention, there is provided an optical transmitter comprising: a frequency modulated source for generating a first frequency modulated signal, and an amplitude modulator for receiving the first frequency modulated signal and for generating a second amplitude and frequency modulated signal.
摘要翻译：在本发明的一种形式中，提供了一种光纤通信系统，包括：光信号源，适于接收基本二进制信号并产生第一信号，所述第一信号被频率调制; 以及适于将第一信号重新形成第二信号的光谱整形器，所述第二信号被幅度调制和频率调制; 其特征在于：所述第一信号的频率特性和所述光谱整形器的光学特性使得所述第二信号的频率特性被配置为增加第二信号对传输光纤中色散的容差。在本发明的另一形式中，提供了一种光发射机，包括：用于产生第一调频信号的调频源和用于接收第一调频信号并用于产生第二幅频调制信号的振幅调制器。

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