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21. 发明授权

US07781736B2 Terahertz frequency domain spectrometer with controllable phase shift 有权
标题翻译：太赫兹频域光谱仪具有可控相移
公开(公告)号：US07781736B2
公开(公告)日：2010-08-24
申请号：US12465219
申请日：2009-05-13
申请人： Ronald T. Logan, Jr. , Joseph R. Demers
发明人： Ronald T. Logan, Jr. , Joseph R. Demers
IPC分类号： G01N21/21 , G01N21/25 , G01J5/02
CPC分类号： G01J3/42 , G01J3/10 , G01J3/4531 , G01N21/3581
摘要： An apparatus for analyzing, identifying or imaging an target including an integrated dual laser module coupled to a pair of photoconductive switches to produce cw signals in the range of frequencies from 100 GHz to over 2 THz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral homodyne process to generate an electrical signal representative of some characteristics of the target with resolution less than 250 MHz. The photoconductive switches are activated by laser beams from the dual laser module. The lasers in the module are tuned to different frequencies and a phase shifter in the path of one beam allows the beams to have an adjustable phase difference.
摘要翻译：一种用于分析，识别或成像目标的装置，所述目标包括耦合到一对光电导开关的集成双激光模块，以产生聚焦在目标上并从所述目标传送或反射的从100GHz到超过2Hz的频率范围内的cw信号; 以及检测器，用于从从目标接收的信号中获取光谱信息，并使用多光谱零差处理来产生表示具有小于250MHz的分辨率的目标的某些特性的电信号。光导开关由来自双激光模块的激光束激活。模块中的激光器被调谐到不同的频率，并且在一个光束的路径中的移相器允许光束具有可调节的相位差。

22. 发明授权

US07291839B1 Subcentimeter radiation detection and frequency domain spectroscopy 有权
标题翻译：亚厘米辐射检测和频域光谱
公开(公告)号：US07291839B1
公开(公告)日：2007-11-06
申请号：US11121350
申请日：2005-05-03
申请人： Joseph R Demers , Ronald T. Logan, Jr.
发明人： Joseph R Demers , Ronald T. Logan, Jr.
IPC分类号： G01J5/02
CPC分类号： G01J3/42 , G01N21/3504 , G01N21/3581
摘要： A system, method and detection arrangement for investigation of a sample are described. A laser illumination arrangement generates (i) a source laser energy that is incident on a source to cause emission of subcentimeter radiation, at least a portion of which interacts with the sample to serve as a sample influenced radiation incident on a detector and (ii) a detector laser energy that is incident on the detector to produce an optical component of the detector laser energy offset with respect to a corresponding optical component of the source laser energy so that the collective energy at the detector generates an electrical output signal responsive to the sample influenced radiation. In another aspect, a detection arrangement is used with at least two continuous wave lasers for causing the detector body to respond in a way which produces a frequency down-converted signal from an incident electromagnetic radiation.
摘要翻译：描述了用于样本调查的系统，方法和检测装置。激光照明装置产生（i）入射到源上的源激光能量，以引起亚厘米辐射的发射，其中至少一部分与样品相互作用以影响入射在检测器上的辐射，以及（ii）检测器激光能量，其入射到检测器上以产生相对于源激光能量的相应光学分量的检测器激光能量偏移的光学部件，使得检测器处的集体能量响应于样品产生电输出信号影响辐射。在另一方面，检测装置与至少两个连续波激光器一起使用，用于使得检测器主体以从入射电磁辐射产生降频变换信号的方式进行响应。

23. 发明授权

US06226424B1 Integrated wavelength-select transmitter 有权
标题翻译：集成波长选择发射机
公开(公告)号：US06226424B1
公开(公告)日：2001-05-01
申请号：US09306108
申请日：1999-05-06
申请人： Gary A. Ball , Robert W. Ade , Karl Kissa , Paul Dunn , Timothy C. Munks , Ronald T. Logan, Jr. , Eitan Gertel
发明人： Gary A. Ball , Robert W. Ade , Karl Kissa , Paul Dunn , Timothy C. Munks , Ronald T. Logan, Jr. , Eitan Gertel
IPC分类号： G02B612
CPC分类号： G02B6/4201 , G02B6/4215 , G02B6/4239 , G02B6/4244 , G02B6/4266 , G02B6/4271 , G02B6/4285
摘要： An integrated optical transmitter for use in an optical system includes an optical head assembly having an optical beam generator for providing an optical beam and a lens assembly for collecting the optical beam and generating therefrom a formed optical beam. Interface optics receive the formed optical beam for coupling the beam to a modulator so as to reduce nsertion loss to the optical beam. The optical modulator receives the optical beam from the interface optics and provides a modulated optical beam in response to received modulation signals. The optical modulator is coupled to the interface optics to be in a fixed relationship therewith. The integrated optical transmitter can include a means for sampling the optical beam and controlling the temperature of and/or the current supplied to the optical beam generator for controlling the wavelength of the optical transmitter. The optical head assembly and the modulator can be compliantly mounted to a mounting surface reducing the effects of thermal stress on the performance of the optical transmitter.
摘要翻译：用于光学系统的集成光发射机包括具有用于提供光束的光束发生器和用于收集光束并由其产生形成的光束的透镜组件的光学头组件。接口光学器件接收形成的光束，用于将光束耦合到调制器，以减少对光束的插入损耗。光调制器从接口光学器件接收光束并且响应于接收的调制信号提供调制的光束。光调制器耦合到界面光学器件以与其成为固定的关系。集成光发射机可以包括用于对光束进行采样并控制提供给光束发生器的温度和/或电流以控制光发射机的波长的装置。光学头组件和调制器可以顺应地安装到安装表面，减少热应力对光发射机性能的影响。

24. 发明授权

US5710651A Remote millimeter-wave antenna fiber optic communication system using dual optical signal with millimeter-wave beat frequency 失效
标题翻译：远程毫米波天线光纤通信系统采用双光信号与毫米波拍频
公开(公告)号：US5710651A
公开(公告)日：1998-01-20
申请号：US571368
申请日：1995-12-13
申请人： Ronald T. Logan, Jr.
发明人： Ronald T. Logan, Jr.
IPC分类号： H04B10/12 , H04B10/142
CPC分类号： H04B10/25758 , H03B28/00
摘要： The transmitter or receiver of the remote antenna system of the present invention includes a fiber optic link connecting the receiver or transmitter station with a remote antenna station. The optical carrier for the fiber optic link is produced by a dual optical signal generator, preferably in the form of two narrow-linewidth lasers frequency offset by a difference frequency corresponding to the millimeter-wave or microwave signal. If the invention is employed to convey a baseband signal from the transmitter station to the antenna station, a modulator at the transmitter station modulates the dual optical signal carrier with the baseband signal. The modulated signal is carried over the optical fiber to a photodetector at the remote antenna station which detects the millimeter wave difference frequency modulated by the baseband signal. If the invention is employed to convey a received millimeter wave signal from the remote antenna station to the receiver station, then a modulator at the remote antenna station modulates the dual optical signal carrier with the received millimeter wave signal. The modulated signal is carried over the optical fiber to a photodiode at the receiver station which detects the baseband contained in the millimeter wave signal.
摘要翻译：本发明的远程天线系统的发射机或接收机包括将接收机或发射台与远程天线台连接的光纤链路。用于光纤链路的光载波由双光信号发生器产生，优选地以两个窄线宽激光器的形式，频率偏移与对应于毫米波或微波信号的差频。如果本发明用于将基带信号从发射台传送到天线台，则发射机站处的调制器用基带信号调制双光信号载波。调制信号通过光纤传送到远程天线站的光电检测器，该检测器检测由基带信号调制的毫米波差频。如果将本发明用于将接收的毫米波信号从远程天线站传送到接收站，则远程天线站处的调制器用接收的毫米波信号调制双光信号载波。调制信号通过光纤传送到检测毫米波信号中包含的基带的接收机处的光电二极管。

25. 发明授权

US5379309A High frequency source having heterodyned laser oscillators injection-locked to a mode-locked laser 失效
标题翻译：具有外差激光振荡器的高频源注入锁定到锁模激光器
公开(公告)号：US5379309A
公开(公告)日：1995-01-03
申请号：US106445
申请日：1993-08-16
申请人： Ronald T. Logan, Jr.
发明人： Ronald T. Logan, Jr.
IPC分类号： G02F2/00 , H01S5/062 , H01S5/40 , H04J14/02 , H01S3/098
CPC分类号： H03B28/00 , H01S5/4006 , G02F2/002 , H01S5/0623 , H01S5/4025 , H01S5/4087 , H04J14/02
摘要： Two independent laser oscillators are injection-locked to different optical modes of a mode-locked laser, then combined and detected to produce the heterodyne output signal in the microwave to submillimeter wave frequency band. Since the phase fluctuations of the mode-locked laser modes are highly correlated, the phase fluctuations of the heterodyne output signal are greatly reduced, providing a low phase-noise oscillator signal. Since the modes of the mode-locked laser can span hundreds of GigaHertz, the oscillator can be employed to generate microwave, millimeter wave or submillimeter wave frequencies.
摘要翻译：两个独立的激光振荡器被注入锁定到锁模激光器的不同光学模式，然后组合和检测以产生微波到亚毫米波频带的外差输出信号。由于锁模激光模式的相位波动高度相关，外差输出信号的相位波动大大降低，提供低的相位噪声振荡器信号。由于锁模激光器的模式可以跨越几百千兆赫兹，振荡器可用于产生微波，毫米波或亚毫米波频率。

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