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1. 发明授权

US06414473B1 Electro-optic/magneto-optic measurement of electromagnetic radiation using chirped optical pulse 有权
标题翻译：使用啁啾光脉冲对电磁辐射进行电光/磁光测量
公开(公告)号：US06414473B1
公开(公告)日：2002-07-02
申请号：US09617242
申请日：2000-07-14
申请人： Xi-Cheng Zhang , Zhiping Jiang
发明人： Xi-Cheng Zhang , Zhiping Jiang
IPC分类号： G01R3100
CPC分类号： G01R29/0885
摘要： Characterization of free-space electromagnetic energy pulses (15) using a chirped optical probe beam is provided. An electro-optic or magneto-optic crystal (14) is positioned such that the free-space radiation and chirped optical probe signal co-propagate, preferably in a co-linear common direction, through the crystal where a temporal waveform of the free-space radiation is linearly encoded onto a wavelength spectrum of the chirped optical probe signal. The temporal waveform of the free-space radiation is then reconstructed using, for example, a dynamic subtraction of the spectral distribution of the chirped optical probe signal without modulation from the spectral distribution of the chirped optical probe signal with modulation by the free-space radiation.
摘要翻译：提供了使用啁啾光学探针光束的自由空间电磁能脉冲（15）的表征。定位电光或磁光晶体（14），使得自由空间辐射和啁啾光学探针信号优选地以共线共同方向共同传播通过晶体，其中自由空间辐射和啁啾光学晶体空间辐射被线性编码在啁啾光学探针信号的波长谱上。然后使用例如通过自由空间辐射调制的啁啾光学探针信号的频谱分布的啁啾光学探针信号的频谱分布的动态减法来重建自由空间辐射的时间波形。

2. 发明授权

US06573700B2 Method of characterizing free-space radiation using a chirped optical pulse 有权
公开(公告)号：US06573700B2
公开(公告)日：2003-06-03
申请号：US10164454
申请日：2002-06-06
申请人： Xi-Cheng Zhang , Zhiping Jiang
发明人： Xi-Cheng Zhang , Zhiping Jiang
IPC分类号： G01R3100
CPC分类号： G01R29/0885
摘要： Characterization of free-space electromagnetic energy pulses (15) using a chirped optical probe beam is provided. An electro-optic or magneto-optic crystal (14) is positioned such that the free-space radiation and chirped optical probe signal co-propagate, preferably in a co-linear common direction, through the crystal where a temporal waveform of the free-space radiation is linearly encoded onto a wavelength spectrum of the chirped optical probe signal. The temporal waveform of the free-space radiation is then reconstructed using, for example, a dynamic subtraction of the spectral distribution of the chirped optical probe signal without modulation from the spectral distribution of the chirped optical probe signal with modulation by the free-space radiation.

3. 发明授权

US06844552B2 Terahertz transceivers and methods for emission and detection of terahertz pulses using such transceivers 有权
标题翻译：太赫兹收发器和使用这种收发器发射和检测太赫兹脉冲的方法
公开(公告)号：US06844552B2
公开(公告)日：2005-01-18
申请号：US09826458
申请日：2001-04-05
申请人： Xi-Cheng Zhang , Masahiko Tani , Zhiping Jiang , Qin Chen
发明人： Xi-Cheng Zhang , Masahiko Tani , Zhiping Jiang , Qin Chen
IPC分类号： G01N21/17 , G01J11/00 , G01N21/35 , G01J5/02
CPC分类号： G01N21/3581 , G01J11/00
摘要： A system for emitting and detecting terahertz frequency electromagnetic pulses. The system comprises a single transceiver device, which may be an electro-optic crystal or photoconductive antenna, for both emitting and detecting the pulses. A related method comprises using a single transceiver device to both emit and detect electromagnetic terahertz frequency pulses. The transceiver device is excited by a pump pulse to emit a terahertz output pulse, which is modulated with a chopper. An object reflects the terahertz pulse and the reflected pulse is detected in the transceiver using a probe pulse. A lock-in amplifier set to the same frequency of the chopper is used to reduce noise in the signal detected by the transceiver. An image of the object may be created using the intensity or the timing of the peak amplitude of the terahertz pulses reflected from the object.
摘要翻译：用于发射和检测太赫兹频率电磁脉冲的系统。该系统包括单个收发器装置，其可以是电光晶体或光电导天线，用于发射和检测脉冲。相关方法包括使用单个收发器装置来发射和检测电磁太赫兹频率脉冲。收发器设备被泵浦脉冲激发以发射用斩波器调制的太赫兹输出脉冲。一个对象反映了太赫兹脉冲，并且使用探针脉冲在收发器中检测到反射的脉冲。设置为与斩波器相同频率的锁定放大器用于降低由收发器检测到的信号中的噪声。可以使用从对象反射的太赫兹脉冲的峰值振幅的强度或定时来创建对象的图像。

4. 发明授权

US06690001B2 THz pulse measurement with an optical streak camera 有权
标题翻译：使用光学条纹相机进行THz脉冲测量
公开(公告)号：US06690001B2
公开(公告)日：2004-02-10
申请号：US09826457
申请日：2001-04-05
申请人： Zhiping Jiang , Xi-Cheng Zhang
发明人： Zhiping Jiang , Xi-Cheng Zhang
IPC分类号： H01J4014
CPC分类号： G04F13/026
摘要： A method and apparatus for measuring electromagnetic pulses as a function of time. Radiation measurement, including measurement of single-shot, free-space terahertz femtosecond pulses, is realized using an electro-optical modulator in combination with an optical streak camera. This method and apparatus allow measurement of electromagnetic pulses previously unmeasurable due to the time resolution restrictions dictated by the time-frequency correlation.
摘要翻译：一种用于测量电磁脉冲作为时间的函数的方法和装置。使用电光调制器与光学条纹相机组合，实现了单次，自由空间太赫兹飞秒脉冲的测量。该方法和装置允许测量由于时间 - 频率相关所规定的时间分辨率限制的先前不可测量的电磁脉冲。

5. 发明授权

US06556306B2 Differential time domain spectroscopy method for measuring thin film dielectric properties 有权
公开(公告)号：US06556306B2
公开(公告)日：2003-04-29
申请号：US09754183
申请日：2001-01-04
申请人： Zhiping Jiang , Ming Li , Xi-Cheng Zhang
发明人： Zhiping Jiang , Ming Li , Xi-Cheng Zhang
IPC分类号： G01B902
CPC分类号： G01N21/41 , G01N21/3563 , G01N21/3586
摘要： A non-contact, free-space method for determining the index of refraction of a thin film at a desired angular frequency. The method includes generating an input desired-frequency pulse and an optically detectable probe pulse. The thin film is moved in and out of the path of the input pulse, creating an output pulse that alternates between a transmitted signal, created when the film intercepts the input pulse path, and a reference signal, created when the sample is outside the input pulse path. The output pulse modulates the probe pulse, which is then detected with a photo detector, and the difference between the transmitted signal and the reference signal is calculated. The above steps are repeated over a plurality of delay times between the input pulse and the probe pulse until a complete field waveform of the differential signal is characterized. The index of refraction is calculated as a function of a ratio between the differential signal for the thin film and the reference signal. A complete field waveform of the reference signal may be characterized by repeating the above steps for a reference plate identical to the sample except having a non-transmissive film instead of the thin, transmissive film.

6. 发明授权

US06734974B2 Terahertz imaging with dynamic aperture 有权
标题翻译：太赫兹成像与动态光圈
公开(公告)号：US06734974B2
公开(公告)日：2004-05-11
申请号：US10056866
申请日：2002-01-25
申请人： Zhiping Jiang , Qin Chen , Xie George Xu , Xi-Cheng Zhang
发明人： Zhiping Jiang , Qin Chen , Xie George Xu , Xi-Cheng Zhang
IPC分类号： G01N2100
CPC分类号： G01N21/3581 , G02F1/3534 , G02F2203/13
摘要： A method of improving spatial resolution of a pump-probe terahertz (THz) imaging system for producing an image of an object. The method provides a chopped optical gating beam focused on a semiconductive layer that is either part of the object or a discrete layer placed over the object. The gating beam is focused on a gating pulse focal spot having a diameter effective to cause measurable modulation in transmission of a THz beam through the semiconductive layer when the gating pulse is on as compared to when the gating pulse is off, creating alternating modulated THz beams for detection and processing. Systems for performing the method in transmission and reflection modes are also described.
摘要翻译：一种提高泵浦太赫兹（THz）成像系统的空间分辨率的方法，用于产生物体的图像。该方法提供了聚焦在作为物体的一部分或放置在物体上的离散层的半导体层的切割的光学门控光束。选通光束聚焦在门控脉冲焦点上，该脉冲焦点有效地在与选通脉冲关闭时相比门控脉冲打开时在THz光束透过半导体层的传输中产生可测量的调制，产生交替调制的THz光束用于检测和处理。还描述了用于在传输和反射模式中执行该方法的系统。

7. 发明授权

US11796647B2 Method and apparatus for detecting an object using optical pulses with non-uniform power 有权
公开(公告)号：US11796647B2
公开(公告)日：2023-10-24
申请号：US16889582
申请日：2020-06-01
申请人： Zhiping Jiang , Ali Ahmed Ali Massoud
发明人： Zhiping Jiang , Ali Ahmed Ali Massoud
IPC分类号： G01S7/4865 , G01S17/10 , G01S7/481 , G01S17/894
CPC分类号： G01S7/4865 , G01S7/4817 , G01S17/10 , G01S17/894
摘要： There is provided a method and apparatus for detecting an object, especially an object remotely placed in a field of view (FOV) using optical pulses with non-uniform pulse power, without exceeding the Accessible Emitted Limit (AEL) A plurality of optical pulses including two or more levels of pulse power may be emitted to detect an object in the FOV. Information related to the object may be generated from the returning optical pulses. The optical pulses with non-uniform pulse power may result in increased probability of detection associated with the pulses returning from the remotely located object, and therefore the density of point clouds associated with the remotely located object may be increased.

8. 发明授权

US10523315B2 Systems and method of multi-band pilot tone based optical performance monitoring 有权
公开(公告)号：US10523315B2
公开(公告)日：2019-12-31
申请号：US15479666
申请日：2017-04-05
申请人： Zhiping Jiang
发明人： Zhiping Jiang
IPC分类号： H04B10/00 , H04B10/079 , H04B10/60 , H04J14/02 , H04L5/00 , H04B10/077
摘要： Systems and methods for applying a pilot tone to multiple spectral bands are provided. An initial signal is divided into multiple spectral bands. A pilot tone is applied to each of the spectral bands, and then the signals are again combined for transmission. The pilot tones differ in some way, for example in phase or frequency.

9. 发明授权

US09473263B2 Method and system for removing a pilot tone from an optical signal 有权
标题翻译：从光信号中去除导频音的方法和系统
公开(公告)号：US09473263B2
公开(公告)日：2016-10-18
申请号：US14598581
申请日：2015-01-16
申请人： Zhiping Jiang , Zhuhong Zhang , Xuefeng Tang
发明人： Zhiping Jiang , Zhuhong Zhang , Xuefeng Tang
IPC分类号： H04B10/00 , H04J14/02 , H04B10/077
CPC分类号： H04J14/0276 , H04B10/077 , H04B10/0775 , H04B10/2504 , H04B10/516 , H04B2210/075 , H04J14/06
摘要： The present applies to digital wavelength converters that convert, independently of the format in which optical data may be encoded, an input waveform at a first wavelength to an output waveform at a second wavelength. When operating in an environment where an input waveform has a pilot tone associated thereto, the method and system of the present disclosure allows for the removal of the pilot tone from the input waveform, and also allows for the addition of another pilot to the output waveform.
摘要翻译：本发明适用于与光学数据可被编码的格式独立地将第一波长的输入波形转换为第二波长的输出波形的数字波长转换器。当在输入波形具有与其相关联的导频音的环境中操作时，本公开的方法和系统允许从输入波形中去除导频音，并且还允许将另外的导频添加到输出波形。

10. 发明授权

US08842947B2 Method and apparatus for colorless add 有权
标题翻译：无色添加剂的方法和装置
公开(公告)号：US08842947B2
公开(公告)日：2014-09-23
申请号：US13292564
申请日：2011-11-09
申请人： Zhiping Jiang , Jian Zhong , Yan Cui
发明人： Zhiping Jiang , Jian Zhong , Yan Cui
IPC分类号： G02B6/26 , H04J14/02
CPC分类号： H04J14/0212 , H04J14/0208 , H04J14/0221
摘要： An apparatus comprising a plurality of switches coupled to a plurality of corresponding colorless laser transmitters, an odd channel coupler coupled to each of the switches, an even channel coupler coupled to each of the switches, and an interleaver coupled to the odd channel coupler and the even channel coupler. Also disclosed is an apparatus comprising a coupler coupled to a plurality of colorless laser transmitters, a first interleaver coupled to the coupler, and a second interleaver coupled to the first interleaver. Also disclosed is an apparatus comprising an odd channel coupler coupled to a plurality of first laser transmitters, an even channel coupler coupled to a plurality of second laser transmitters, and an interleaver coupled to the odd channel coupler and the even channel coupler.
摘要翻译：一种装置，包括耦合到多个对应的无色激光发射器的多个开关，耦合到每个开关的奇数通道耦合器，耦合到每个开关的偶数通道耦合器，以及耦合到奇数通道耦合器和偶数通道耦合器。还公开了一种装置，包括耦合到多个无色激光发射机的耦合器，耦合到耦合器的第一交织器和耦合到第一交织器的第二交织器。还公开了一种装置，包括耦合到多个第一激光发射器的奇信道耦合器，耦合到多个第二激光发射器的偶信道耦合器，以及耦合到奇信道耦合器和偶信道耦合器的交织器。

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