公开(公告)号：US10801893B2

公开(公告)日：2020-10-13

申请号：US16316928

申请日：2017-07-04

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi

IPC: G01J3/45 ,  G01J9/02 ,  G01J3/04 ,  G01B11/25

Abstract: A spectroscope for measuring a spectrum of input light includes a fringe former that forms first fringes having a first pitch by splitting the input light, a diffraction grating that disperses each of the first fringes, a moire pattern former that forms a moire pattern by overlaying the first fringes that have been dispersed, on second fringes having a second pitch different from the first pitch, and an image pickup device that measures the spectrum of the input light by detecting the moire pattern. At least one of the fringe former and the moire pattern former includes a cylindrical lens array.

公开(公告)号：US09337922B2

公开(公告)日：2016-05-10

申请号：US14379806

申请日：2013-02-06

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi ,  Koji Takahashi ,  Tomotaka Nagashima

IPC: H04B10/00 ,  H04B10/079 ,  G01J11/00 ,  H04B10/25

CPC classification number: H04B10/07955 ,  G01J11/00 ,  H04B10/25

Abstract: A waveform reconstruction device (140) includes: a phase-spectrum calculation unit (143) which (i) simulates, for each intensity of an input optical signal assumed to have a given phase spectrum, propagation of the input optical signal through an optical transmission medium, to calculate a power spectrum of an output optical signal, and (ii) performs iterations of simulating the propagation while changing the given phase spectrum to reduce differences between calculated power spectra and measured power spectra of the input optical signal having the intensities, to search for a phase spectrum of the input optical signal; and a waveform reconstruction unit (144) which reconstructs a time waveform of the input optical signal using the phase spectrum found through the search, wherein the phase-spectrum calculation unit (143) changes the given phase spectrum or simulates the propagation, based on a nonlinear optical effect or a dispersion effect.

Abstract translation: 波形重建装置（140）包括：相位谱计算单元（143），其对（假定具有给定相位谱的输入光信号的每个强度）模拟通过光传输的输入光信号的传播 介质，以计算输出光信号的功率谱，以及（ii）在改变给定相位频谱的同时进行模拟传播的迭代，以减少计算的功率谱与具有强度的输入光信号的测量功率谱之间的差异，以便 搜索输入光信号的相位谱; 以及波形重建单元（144），其使用通过搜索找到的相位频谱来重构输入光信号的时间波形，其中相位频谱计算单元（143）基于相位谱计算单元（143）改变给定的相位谱或模拟传播， 非线性光学效应或分散效应。

公开(公告)号：US12235158B2

公开(公告)日：2025-02-25

申请号：US18008257

申请日：2021-06-22

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi ,  Ryohei Kamikawa ,  Yu Yamasaki

IPC: G01J3/12 ,  G01J11/00 ,  H04B10/67

Abstract: An optical signal detection system includes: a nonlinear converter that nonlinearly converts a plurality of first optical signals into a plurality of second optical signals, and also a third optical signal into a fourth optical signal; a spectrometer that obtains each of a plurality of first spectral data items from a different one of the plurality of second optical signals, and also a third spectral data item from the fourth optical signal; and a detection device that detects the third optical signal and outputs a detection result. The detection device includes: an analyzer that performs sparse principal component analysis on the plurality of first spectral data items to generate a plurality of second spectral data items; and a detector that compares the third spectral data item with each of the plurality of second spectral data items, and detects the third optical signal based on the result of the comparison.

公开(公告)号：US09989784B2

公开(公告)日：2018-06-05

申请号：US15554300

申请日：2016-02-16

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi

IPC: G02B6/293 ,  G02F1/01 ,  G02F7/00

CPC classification number: G02F1/011 ,  G02B6/2938 ,  G02F7/00 ,  G02F2203/26

Abstract: An optical quantizer including: a first shaping unit which performs at least intensity modulation of the sampling optical pulses using an analog signal to generate first optical pulses having a spectrum in which intensity is flat in a spectrum axis direction; a second shaping unit which performs spectrum shaping of the sampling optical pulses to generate second optical pulses having a spectrum in which intensity increases or decreases monotonously in the spectrum axis direction; a phase shifter which shifts a phase of optical pulses input to one of the first shaping unit and the second shaping unit so that a phase difference between the first optical pulses and the second optical pulses becomes a predetermined phase difference; an interference device which causes interference between the first optical pulses and the second optical pulses; and a wavelength demultiplexer which demultiplexes optical pulses output from the interference device into light of wavebands.

公开(公告)号：US11933735B2

公开(公告)日：2024-03-19

申请号：US17440896

申请日：2020-03-25

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi

IPC: G01N21/88 ,  G01J3/18 ,  G01J3/42 ,  G01N21/31

CPC classification number: G01N21/8806 ,  G01J3/18 ,  G01J3/42 ,  G01N21/31 ,  G01N2021/8845 ,  G01N2021/8854

Abstract: An optical detection device is an optical detection device that detects a desired wavelength component included in input light, and includes: a spectrometer including, for instance, a diffraction grating that receives the input light as an input and outputs an alignment of spectra each of which is a duplication of a spectrum of the input light; a second slit array including an array of three or more slits that pass light beams of wavelengths at three or more locations in the alignment of the spectra that are output from the spectrometer; and an imaging element composed of an array of pixels that receive the light beams, having passed through the second slit array, each of the light beams having three or more wavelength components. At least two pitches between slits are different in the array of the three or more slits included in the second slit array.

公开(公告)号：US09846081B2

公开(公告)日：2017-12-19

申请号：US14775321

申请日：2014-03-10

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi ,  Takema Satoh ,  Tomotaka Nagashima

IPC: G01J3/28 ,  G01J3/457 ,  G01J3/18 ,  G01J3/02 ,  G02B6/12

CPC classification number: G01J3/457 ,  G01J3/0297 ,  G01J3/18 ,  G01J3/2803 ,  G01J2003/1861 ,  G01J2003/2866 ,  G02B6/12

Abstract: A light wavelength measurement method of measuring a wavelength of target light includes: receiving target light on a second dispersion device that disperses the target light into a plurality of second beams which reach a plurality of positions corresponding to the wavelength of the target light (S106, S202); and measuring the wavelength of the target light, by using the plurality of the second beams as a vernier scale for measuring the wavelength of the target light within a wavelength range specified by a main scale (S108, S204).

公开(公告)号：US09778138B2

公开(公告)日：2017-10-03

申请号：US14761955

申请日：2013-12-24

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi ,  Koji Takahashi ,  Kentaro Kawanishi

IPC: G01N21/00 ,  G01M11/00

CPC classification number: G01M11/338 ,  G01M11/3145 ,  G01M11/33 ,  G01M11/333

Abstract: A light physical constant measurement method includes: virtually dividing an optical transmission medium along a propagation direction to set a plurality of first segments; and estimating light physical constants of the plurality of first segments based on the result of a first propagation simulation that uses a model in which an input optical signal of each of the plurality of intensities propagates sequentially through the plurality of first segments, and in the estimating of light physical constants of the plurality of first segments, the light physical constants of the plurality of first segments are searched for using an evaluation function of evaluating a difference between a measured power spectrum of an output optical signal and a power spectrum of the output optical signal obtained as a result of the first propagation simulation, to estimate the light physical constants of the plurality of first segments.

公开(公告)号：US12140823B2

公开(公告)日：2024-11-12

申请号：US17769928

申请日：2020-09-30

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi ,  Yuta Kaihori

IPC: G06F1/02 ,  G02F1/01 ,  G02F2/00

Abstract: An arbitrary waveform generation device is an arbitrary waveform generation device that generates, from an arbitrary waveform of a first electrical signal, an arbitrary waveform of a second electrical signal having a frequency higher than a frequency of the first electrical signal, and includes: a modulator that modulates, with the first electrical signal, an optical carrier wave which is dispersed to have a central wavelength that varies with time; a dispersion compensator that performs dispersion compensation on the optical carrier wave modulated with the first electrical signal; and a photoelectric converter that converts the optical carrier wave which has been dispersion-compensated into an electrical signal to generate the second electrical signal.

公开(公告)号：US10481004B2

公开(公告)日：2019-11-19

申请号：US15812049

申请日：2017-11-14

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi ,  Takema Satoh ,  Tomotaka Nagashima

IPC: G01J3/457 ,  G01J3/18 ,  G01J3/28 ,  G01J3/02 ,  G02B6/12

Abstract: A light wavelength measurement method of measuring a wavelength of target light includes: receiving target light on a second dispersion device that disperses the target light into a plurality of second beams which reach a plurality of positions corresponding to the wavelength of the target light; and measuring the wavelength of the target light, by using the plurality of the second beams as a vernier scale for measuring the wavelength of the target light within a wavelength range specified by a main scale.

公开(公告)号：US20150010303A1

公开(公告)日：2015-01-08

申请号：US14379806

申请日：2013-02-06

Applicant: OSAKA UNIVERSITY

Inventor： Tsuyoshi Konishi ,  Koji Takahashi ,  Tomotaka Nagashima

IPC: H04B10/079 ,  H04B10/25

CPC classification number: H04B10/07955 ,  G01J11/00 ,  H04B10/25

Abstract: A waveform reconstruction device (140) includes: a phase-spectrum calculation unit (143) which (i) simulates, for each intensity of an input optical signal assumed to have a given phase spectrum, propagation of the input optical signal through an optical transmission medium, to calculate a power spectrum of an output optical signal, and (ii) performs iterations of simulating the propagation while changing the given phase spectrum to reduce differences between calculated power spectra and measured power spectra of the input optical signal having the intensities, to search for a phase spectrum of the input optical signal; and a waveform reconstruction unit (144) which reconstructs a time waveform of the input optical signal using the phase spectrum found through the search, wherein the phase-spectrum calculation unit (143) changes the given phase spectrum or simulates the propagation, based on a nonlinear optical effect or a dispersion effect.

Abstract translation: 波形重建装置（140）包括：相位谱计算单元（143），其对（假定具有给定相位谱的输入光信号的每个强度）模拟通过光传输的输入光信号的传播 介质，以计算输出光信号的功率谱，以及（ii）在改变给定相位频谱的同时进行模拟传播的迭代，以减少计算的功率谱与具有强度的输入光信号的测量功率谱之间的差异，以便 搜索输入光信号的相位谱; 以及波形重建单元（144），其使用通过搜索找到的相位频谱来重构输入光信号的时间波形，其中相位频谱计算单元（143）基于相位谱计算单元（143）改变给定的相位谱或模拟传播， 非线性光学效应或分散效应。