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公开(公告)号：US4973160A
公开(公告)日：1990-11-27
申请号：US334029
申请日：1989-04-06
Applicant: Yoshihiro Takiguchi , Robert R. Alfano , Yury Budansky
Inventor： Yoshihiro Takiguchi , Robert R. Alfano , Yury Budansky
CPC classification number: G01J11/00 , G01J9/02 , G01N21/636
Abstract: An SHG autocorrelator for use in measuring the duration of an ultrashort pulse of light includes in one embodiment a thin pellicle beamsplitter for splitting the pulse of light into first and second beams, a stationary optical delay disposed along the path of the first beam, a movable optical delay disposed along the path of the second beam, a thin SHG crystal, a concave mirror for bringing the first and second beams to focus into the SHG crystal, a photodetector for detecting light emitted from the SHG crystal, and a narrow bandpass filter in front of the photodetector for filtering out non second harmonic light. The device reduces time broadening and delay of ultrashort pulses in the femtosecond time domain.
Abstract translation: 用于测量超短脉冲光持续时间的SHG自相关器包括在一个实施例中，用于将光脉冲分为第一和第二光束的薄薄膜分束器，沿第一光束路径设置的固定光学延迟， 沿着第二光束的路径设置的光学延迟，薄的SHG晶体，用于使第一和第二光束聚焦到SHG晶体中的凹面镜，用于检测从SHG晶体发射的光的光电检测器和窄带通滤波器 用于滤除非二次谐波光的光电检测器的前部。 该器件减少了飞秒时域中超短脉冲的时间拓宽和延迟。
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公开(公告)号：US4792230A
公开(公告)日：1988-12-20
申请号：US93653
申请日：1987-09-08
Applicant: Kazunori Naganuma , Juichi Noda
Inventor： Kazunori Naganuma , Juichi Noda
CPC classification number: G01J11/00
Abstract: A method and apparatus for measuring ultrashort optical pulses is described. Pulse waveforms to be measured are the type which vary at high speed in a time close to or less than the response time of an optical detector. Changes of optical wavelength or frequency are measured at various sections of that pulse. The light to be measured is split into two beams, and recombined after provided with different delay times, respectively. The combined light is caused to enter a doubling crystal to generate a second-harmonic light, and the second-harmonic light component, or both the second-harmonic and fundamental components, is measured. The intensity shape and chirping of the pulses is obtained from the changes in the intensity of these components as a function of delay time difference by Fourier analysis including iterative arithmetic operations.
Abstract translation: 描述了用于测量超短光脉冲的方法和装置。 要测量的脉冲波形是在接近或小于光学检测器的响应时间的时间内以高速度变化的类型。 在该脉冲的各个部分测量光学波长或频率的变化。 要测量的光被分成两束，分别在提供不同的延迟时间之后重新组合。 使组合的光进入双晶体以产生二次谐波光，并且测量二次谐波光分量，或二次谐波和基波分量两者。 脉冲的强度形状和啁啾是通过傅立叶分析（包括迭代算术运算）作为延迟时间差的函数从这些分量的强度变化中获得的。
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公开(公告)号：US4681436A
公开(公告)日：1987-07-21
申请号：US706590
申请日：1985-02-28
Applicant: Neng H. Ching , Ralph G. Marson , Michael J. Norman , John L. Hughes
Inventor： Neng H. Ching , Ralph G. Marson , Michael J. Norman , John L. Hughes
CPC classification number: G04F13/026 , G01J11/00
Abstract: A system for measuring laser pulse durations in the range of ten nanoseconds to one femtosecond to an accuracy of one femtosecond, includes a primary pulse sampler, a ten component beam splitter array, optical delay lines whose settings are microprocessor controlled, a ten section interaction chamber with ten sets of ion detectors and a pulse envelope and pulse energy display monitors. The system has applications in chemistry, calibration of fast timing circuits and in the development of short pulse lasers.
Abstract translation: 用于测量在10纳秒到1飞秒范围内的激光脉冲持续时间的系统，其精度为1飞秒，包括初级脉冲采样器，10分量分束器阵列，设置为微处理器控制的光学延迟线， 具有十组离子检测器和脉冲包络和脉冲能量显示器。 该系统具有化学应用，快速定时电路的校准和短脉冲激光器的开发。
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公开(公告)号：US3719889A
公开(公告)日：1973-03-06
申请号：US3719889D
申请日：1971-12-14
Applicant: US AIR FORCE
Inventor： BELZ R , KALB H , TROLINGER J
CPC classification number: H01S3/0014 , G01J11/00 , G04F10/04 , G04G9/10
Abstract: Pulses from a laser pulse train are detected and square wave shaped to trigger a first flip-flop in which one complementary output activating one input of a display comprising an array of light emitting diodes while the other output triggers a NOR gate and a second flip-flop, one complementary output thereof feeding a second input of the display with the other complementary output feeding the NOR gate which then feeds back to inhibit the first flip-flop. The square wave also activates a third flip-flop with one cpmplementary output thereof enabling a NOR gate for passing clock pulses which are decade divided and displayed on light emitting diode arrays. The other output of the third flip-flop feeds a pair of cross coupled NOR gates acting as a flip-flop, the output thereof being fed back to inhibit the third flipflop.
Abstract translation: 来自激光脉冲串的脉冲被检测和方波形以触发第一触发器，其中一个互补输出激活包括发光二极管阵列的显示器的一个输入，而另一个输出触发NOR门和第二触发器， 触发器，其一个互补输出端将显示器的第二输入端与馈送NOR门的另一个互补输出端进行反馈，该门极反馈以禁止第一触发器。 方波还激活具有一个互补输出的第三触发器，其使得NOR门能够传递在发光二极管阵列上被十分分割和显示的时钟脉冲。 第三触发器的另一输出端提供一对用作触发器的交叉耦合的或非门，其输出被反馈以禁止第三触发器。
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95.发明授权
公开(公告)号：US3641343A
公开(公告)日：1972-02-08
申请号：US3641343D
申请日：1970-09-08
Applicant: PHILIPPE LANGER
Inventor： LANGER PHILIPPE
CPC classification number: G01J11/00 , G04F13/026
Abstract: A method of and apparatus for the measurement of duration of ultrashort pulses of monochromatic polarized light, such as laser pulses. The method comprises splitting the polarized light beam into two identical beams; causing the two split beams to travel through the same optical path and to interfere on a photocathode comprising a thin metal layer disposed in vacuo, the energy required to detach the electrons from the layer being greater than the energy of the incident light photons; producing an image of the multiphotonic interaction zone obtained on the photocathode by means of electrons detached from the photocathode by a multiphotonic process in response to photons in coincidence from the two split light pulse therefrom. The apparatus is appropriate for carrying out the method.
Abstract translation: 用于测量诸如激光脉冲的单色偏振光的超短脉冲持续时间的方法和装置。 该方法包括将偏振光束分成两个相同的光束; 使得两个分离光束穿过相同的光路并且干涉包含真空设置的薄金属层的光电阴极，使电子从该层分离的能量大于入射光子的能量所需的能量; 产生通过多光子过程从光电阴极分离的电子在光电阴极上获得的多光子相互作用区域的图像，响应于来自其的两个分裂光脉冲的光子。 该装置适用于执行该方法。
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Patent Agency Ranking
96.发明公开公开(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
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.
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97.发明授权公开(公告)号：US12034207B2
公开(公告)日：2024-07-09
申请号：US17593654
申请日：2020-01-20
Inventor： Simon Nellen , Björn Globisch
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.
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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.
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公开(公告)号：US11682275B2
公开(公告)日：2023-06-20
申请号：US17327762
申请日：2021-05-24
Applicant: Po-Yang Chien , Wei-Yi Chang , Chun-Chieh Chen , Chen-Cheng Wang
Inventor： Po-Yang Chien , Wei-Yi Chang , Chun-Chieh Chen , Chen-Cheng Wang
IPC: G08G5/00 , G08B5/36 , H04N7/15 , H04N7/14 , G06F3/04847 , H04R1/08 , G01J3/50 , G01J11/00 , F21V33/00 , G06F1/16 , G06F3/04817 , H04R3/00 , F21W111/00
CPC classification number: G08B5/36 , F21V33/0052 , G01J3/506 , G01J11/00 , G06F3/04847 , H04N7/142 , H04N7/15 , H04R1/08 , F21W2111/00 , G06F1/1613 , G06F3/04817 , H04R3/00
Abstract: An electronic device with an auxiliary lighting function and an operation method thereof are provided. The electronic device includes a first body, a display screen, and a light-emitting module. The first body has a first surface. The first surface includes a screen area and a border area. The border area surrounds the screen area. The display screen is disposed in the screen area of the first body. The light-emitting module is disposed in the border area of the first body. The light-emitting module provides an illumination light in at least one first area of the border area, and provides an indicating light in at least one second area of the border area.
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公开(公告)号：US20190128741A1
公开(公告)日：2019-05-02
申请号：US16088875
申请日：2017-03-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Koji TAKAHASHI , Haruyasu ITO , Koyo WATANABE
CPC classification number: G01J11/00 , G01J3/0297 , G01J3/28 , G01J3/447 , G02F1/01 , G02F1/13 , G02F1/137
Abstract: In a waveform measurement method, first, initial pulsed light is spatially dispersed for respective wavelengths. Next, the initial pulsed light is input to a polarization dependent type SLM in a state where a polarization plane is inclined with respect to a modulation axis direction, and a phase spectrum of a first polarization component of the initial pulsed light along the modulation axis direction is modulated, to cause a time difference between first pulsed light Lp1 including the first polarization component and second pulsed light Lp2 including a second polarization component orthogonal to the first polarization component. After combining the wavelength components, an object is irradiated with the pulsed light Lp1 and the pulsed light Lp2, and light generated in the object is detected. The above detection operation is performed while changing the time difference, and a temporal waveform of the pulsed light Lp1 is obtained.
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