公开(公告)号：US4945224A

公开(公告)日：1990-07-31

申请号：US291825

申请日：1988-12-29

Applicant: Musubu Koishi ,  Etsuo Tsujimura ,  Motoyuki Watanabe ,  Yutaka Tsuchiya

Inventor： Musubu Koishi ,  Etsuo Tsujimura ,  Motoyuki Watanabe ,  Yutaka Tsuchiya

IPC: G01J1/02 ,  G01J11/00 ,  H01J31/50

CPC classification number: G01J11/00 ,  H04N5/217 ,  G01J2011/005

Abstract: Optical waveform observing apparatus including a sampling streak tube to which is applied an incident light beam having a waveform to be observed. An electron beam corresponding to the incident light beam is repetitively deflected in the streak tube, in response to a repetitive deflecting trigger signal, to sample the electron beam. The repetitive deflection of the electron beam is periodically stopped for a first time period. An integration circuit integrates data outputted by the streak tube. A subtraction circuit subtracts the integration of streak tube data outputted during the first time period from the integration of streak tube data outputted during a second time period when the repetitive beam deflection is not stopped, so that background noise and dark currents are not included in the subtraction result.

Abstract translation: 光波形观测装置包括采样条纹管，对其进行观察波形的入射光束。 对应于入射光束的电子束响应于重复的偏转触发信号在条纹管中重复偏转，以对电子束进行采样。 电子束的重复偏转在第一时间周期性地停止。 积分电路集成了条纹管输出的数据。 减法电路减去在第一时间段期间输出的条纹管数据的积分从在第二时间段期间输出的条纹管数据的积分，当不停止重复光束偏转时，使得背景噪声和暗电流不包括在 减法结果。

公开(公告)号：US4772118A

公开(公告)日：1988-09-20

申请号：US884848

申请日：1986-07-14

Applicant: Jia M. Liu ,  Ying C. Chen

Inventor： Jia M. Liu ,  Ying C. Chen

IPC: G01J11/00 ,  G01J1/00

CPC classification number: G01J11/00

Abstract: The duration of a very short semiconductor laser pulse, such as that ranging from a fraction to hundreds to picoseconds, can be measured utilizing the internally generated second harmonic emission of the laser. A laser diode is driven so that light emitted therefrom can pass through a beam splitter and be reflected by the beam-splitter into a photomultiplier and into a detector, respectively. Signals received therefrom relate to the conversion efficiency of the second harmonic emission generated by the picosecond pulses and of either continuous wave emission or pulse emission whose durations can be accurately measured by photodetectors. Apparatus includes a photodiode for measuring the fundamental laser power, a photomultiplier for measuring the second harmonic power, and appropriate filters. Ammeters coupled to the photodiode and photomultiplier measure the appropriate current. The ratio of the current can be determined by a ratio circuit or a computer.

Abstract translation: 使用内部产生的激光二次谐波发射可以测量非常短的半导体激光脉冲的持续时间，例如范围从数百到数百到皮秒的持续时间。 激光二极管被驱动，使得从其发射的光可以通过分束器并且被分束器分别反射成光电倍增管并分别进入检测器。 从其接收的信号涉及由皮秒脉冲产生的二次谐波发射和连续波发射或脉冲发射的转换效率，其持续时间可由光电探测器精确测量。 装置包括用于测量基本激光功率的光电二极管，用于测量二次谐波功率的光电倍增管和适当的滤波器。 耦合到光电二极管和光电倍增管的耦合器测量适当的电流。 电流比可以由比例电路或计算机确定。

公开(公告)号：US4718761A

公开(公告)日：1988-01-12

申请号：US827067

申请日：1986-02-07

Applicant: Yutaka Tsuchiya

Inventor： Yutaka Tsuchiya

IPC: G01J1/42 ,  G01J3/28 ,  G01J11/00 ,  H01J31/50 ,  G01N21/64

CPC classification number: H01J31/502 ,  G01J3/2889 ,  G01J2001/4238 ,  G01N21/6408

Abstract: An instrument concurrently measuring the ultra-high-speed light signals on a plurality of channels, and consisting of a streaking tube, optical means, deflection voltage generation means, a photodiode array and processing means. It can be used to periodically measure the mechanical distortion of the object being measured when a dye laser beam pulse is incident of the object, and time-serial data is developed on a plurality of channels to output parallel data on a parallel time base.

Abstract translation: 同时测量多个通道上的超高速光信号的仪器，由条纹管，光学装置，偏转电压产生装置，光电二极管阵列和处理装置组成。 当染料激光束脉冲入射物体时，可以定期测量被测物体的机械畸变，并且在多个通道上产生时间序列数据，以在并行时基上输出并行数据。

公开(公告)号：US4480192A

公开(公告)日：1984-10-30

申请号：US349396

申请日：1982-02-16

Applicant: Georg F. Albrecht ,  Gerard Mourou

Inventor： Georg F. Albrecht ,  Gerard Mourou

IPC: G01J11/00 ,  G04F13/02 ,  G02B27/42

CPC classification number: G04F13/026 ,  G01J11/00

Abstract: The temporal shape of optical pulses is measured over a wide dynamic range, for example, 10 orders of magnitude, by passing an optical signal corresponding to the autocorrelation function of the optical pulses through a variable attenuation filter, the position of which is a function of the attenuation. By plotting the attenuation of the filter in terms of the position thereof, against the duration of the temporal overlap of the pulses in a mixing crystal which produces the optical signal corresponding to the autocorrelation function, the temporal shape of the pulses is displayed.

Abstract translation: 通过将对应于光脉冲的自相关函数的光信号通过可变衰减滤波器，在宽的动态范围（例如10个数量级）上测量光脉冲的时间形状，该可变衰减滤波器的位置是 衰减。 通过根据其位置绘制滤波器的衰减，与产生对应于自相关函数的光信号的混合晶体中的脉冲的时间重叠的持续时间相比，显示脉冲的时间形状。

公开(公告)号：US3675985A

公开(公告)日：1972-07-11

申请号：US3675985D

申请日：1970-08-03

Applicant: BELL TELEPHONE LABOR INC

Inventor： GLOGE DETLEF CHRISTOPH

IPC: G01J11/00 ,  G02F1/37 ,  G04F13/02 ,  G02B27/28 ,  G02F1/26

CPC classification number: G04F13/026 ,  G01J11/00 ,  G02F1/37

Abstract: AN OPTICAL AUTOCORRELATOR WHICH CVAN BE EMPLOYED TO INVESTIGATE OPTICAL PULSES HAVING DURATIONS OF THE ORDER OF 10-12 SECONDS IS DISCLOSED. THE AUTOCORRELATOR COMPRISES A SINGLE BRIEFRINGENT, NONLINEAR MEDIUM. OPTICAL PULSES ARE APPLIED TO THE MEDIUM SUCH THAT EACH PULSE IS RESOLVED INTO TWO ORTHOGONALLY POLARIZED COMPONENT PULSES TRAVELING WITH DIFFERENT GROUP VELOCITIES. BY CAUSING MULTIPLE REFLECTIONS OF THE PULSES BETWEEN A FIRST AND SECOND SURFACE OF THE MEDIUM, THE PULSES ARE MADE TOTRACE OUT A ZIGZAG PATH WITHIN THE MEDIUM. IN EACH TRAVERSAL FROM THE FIRST SURFACE TO THE SECOND SURFACE, THE PULSES GENERATE SECOND

HARMONIC POWER WHOSE TIME AVERAGE IS SUBSTANTIALLY PROPORTIONAL TO A POINT ON THE INTENSITY AUTOCORRELATION FUNCTION OF THE PULSES. SECOND HARMONIC DETECTORS, LOCATED AT THE REFLECTION POINTS ON THE SECOND SURFACE, DETECT THE SECOND HARMONIC POWER GENERATED, AND VARIOUS POINTS ON THE AUTOCORRELATION FUNCTION ARE THEREBY OBTAINED. THE LATTER FUNCTION CONTAINS ESSENTIALLY ALL THE INFORMATION ABOUT THE PULSES, E.G, THEIR WIDTH AND THEIR REPETITION RATE.

公开(公告)号：US20250044160A1

公开(公告)日：2025-02-06

申请号：US18719039

申请日：2022-11-15

Applicant: THE SECRETARY OF STATE FOR DEFENCE

Inventor： Sean Michael Tsi-ong Tipper

IPC: G01J11/00

Abstract: The present application relates to the field of detecting pulsed radiation, in particular to methods and apparatus suitable for use in detecting short pulse lasers and extracting their pulse repetition frequencies, and especially an improved computer implemented method for detecting a pulse repetition frequency of pulsed radiation using a sensor array of sensor elements arranged in element lines.

公开(公告)号：US12181841B2

公开(公告)日：2024-12-31

申请号：US17946051

申请日：2022-09-16

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Zhongmin Yang ,  Yuankai Guo ,  Xiaoming Wei

IPC: G04F13/02 ,  G01J11/00 ,  G01S7/295

Abstract: The present application relates to a real-time measurement method and system for ultrafast space-time-frequency three-domain information based on space-time-frequency compression. The method includes: generating an ultrafast-pulse optical signal in a to-be-observed physical system; performing intensity-modulated spatial encoding on the ultrafast-pulse optical signal; arranging, by a space-time editor, a time-domain series of an encoded ultrafast-pulse optical signal in a horizontal space direction; performing, by a frequency-space editor, frequency spectral processing on a space-time distribution encoding form of the encoded ultrafast-pulse optical signal; performing, by a frequency-time delayer, frequency-time delaying on an encoded space-time-frequency synchronized ultrafast-pulse optical signal; performing, by an area array detector, real-time compression and acquisition on a high-frequency-resolution encoded space-time-frequency synchronized ultrafast-pulse optical signal, to obtain compressed encoded data information; and decompressing and decoding data according to the compressed encoded data information, to obtain space-time-frequency three-domain synchronization information of the ultrafast-pulse optical signal.

公开(公告)号：US20240344892A1

公开(公告)日：2024-10-17

申请号：US18635159

申请日：2024-04-15

Applicant: SPHERE ULTRAFAST PHOTONICS, S.A

Inventor： Chen Guo ,  Cord Louis Arnold ,  Anne L'Huillier Wahlström ,  Miguel Nicolau da Costa Ribeiro de Miranda ,  Helder Manuel Paiva Rebelo Cerejo Crespo ,  Rosa Maria Romero Muñiz

IPC: G01J9/02 ,  G01J11/00

CPC classification number: G01J9/02 ,  G01J11/00 ,  G01J2009/0261 ,  G01J2009/0284

Abstract: The present document discloses a method for measuring the carrier-envelope phase, CEP, offset of ultrashort light pulses, the method comprising: generating an optical interference signal encoding the CEP offset of a light pulse to be measured; applying at least two spectral filters in parallel to the generated interference signal, wherein the transmission functions of the spectral filters are periodic and the at least two spectral filters have partial or fully orthogonal components among themselves; detecting each signal filtered by each of the at least two spectral filters to obtain a magnitude for each of the filtered signals; converting the two obtained magnitudes to a polar representation having a radius and an angle; outputting the CEP offset from the angle of the converted polar representation. It is also disclosed a corresponding system, a field-resolved spectrometer including the system and the use of the system in spectroscopy or in field-resolved spectroscopy.

公开(公告)号：US12034207B2

公开(公告)日：2024-07-09

申请号：US17593654

申请日：2020-01-20

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Simon Nellen ,  Björn Globisch

IPC: H01Q9/00 ,  H01Q1/38 ,  H01Q9/28 ,  H01Q15/00 ,  G01J11/00

CPC classification number: H01Q1/38 ,  H01Q9/285 ,  H01Q15/0033 ,  G01J11/00

Abstract: Receiving antenna (1) for terahertz radiation (30), comprising an antenna conductor (2) and a first photoconductor (3) connected to the antenna conductor (2) and activatable by light (9), the first photoconductor (3) allowing, in an activated state, an antenna current (28) flowing through the antenna conductor (2) and the first photoconductor (3), characterized in that the receiving antenna (1) comprises at least one second photoconductor (4) connected to the antenna conductor (2) and activatable by light (9), the second photoconductor connected in parallel with the first photoconductor (3) and, in an activated state, allowing an antenna current (28) flowing through the antenna conductor (2) and the second photoconductor (4), wherein at least one respective high-pass filter (8) is connected between each of the photoconductors (3, 4) and the antenna conductor (2). The invention further relates to a receiver for terahertz radiation (30), a terahertz system, and a method for generating and detecting terahertz radiation (30) using such a terahertz system.

公开(公告)号：US20230258504A1

公开(公告)日：2023-08-17

申请号：US18133250

申请日：2023-04-11

Applicant: National Yang Ming Chiao Tung University

Inventor： Chih-Wei LUO ,  Yi-Chen LIU ,  Tien-Tien YEH

IPC: G01J11/00

CPC classification number: G01J11/00

Abstract: An optical pulse measuring method measuring an optical pulse generated from a pulse light source is provided. The method includes: splitting the optical pulse and then focusing them at a measuring point, so as to generate gas plasma by the autocorrelation of the split optical pulses; receiving the sound signal from the gas plasma and generate a plasma sound signal; and using the plasma sound signal to calculate the characteristics of the optical pulse. A measuring device is also provided.