APPARATUS AND METHOD FOR MEASURING THE INTENSITY AND PHASE OF A LIGHT PULSE
    24.
    发明申请
    APPARATUS AND METHOD FOR MEASURING THE INTENSITY AND PHASE OF A LIGHT PULSE 有权
    用于测量光脉冲强度和相位的装置和方法

    公开(公告)号:US20150109620A1

    公开(公告)日:2015-04-23

    申请号:US14396978

    申请日:2013-04-23

    Abstract: Provided are a method and an apparatus for measuring the spectral intensity and phase of a light pulse having an arbitrary time duration. The apparatus includes: a nonlinear mixing means for generating a signal light pulse expressed by the following Formula (★ denotes an operator representing general nonlinear mixing, and α denotes a coefficient which is proportional to a nonlinear susceptibility in the nonlinear mixing) by nonlinearly mixing a reference light pulse having an electric field Er(t−τ) delayed by an optical delay means and a measurement target light pulse having an electric field E0(t); and Er(t−τ)+αEr(t−τ)★E0(t) an imaging spectrum device for spectrally splitting the signal light pulse and outputting a Fourier transform signal expressed by the following Formula (F denotes a symbol indicating Fourier transform, * denotes a complex conjugate, and R denotes a symbol indicating a real part), |F[Er(t−τ)]|2+|αF[Er(t−τ)★E0(t)]|2+2R{αF[Er(t−τ)]*·F[Er(t−τ)★E0(t)]}.

    Abstract translation: 提供了一种用于测量具有任意持续时间的光脉冲的光谱强度和相位的方法和装置。 该装置包括:非线性混合装置,用于产生由以下公式表示的信号光脉冲(★表示通用非线性混合的运算符,并且α表示与非线性混合中的非线性磁化率成比例的系数),通过非线性混合 具有由光延迟装置延迟的电场Er(t-τ)的参考光脉冲和具有电场E0(t)的测量目标光脉冲; 以及Er(t-τ)+αEr(t-τ)★E0(t)用于频谱分割信号光脉冲并输出由下式表示的傅里叶变换信号的成像光谱装置(F表示表示傅立叶变换的符号, | F [Er(t-τ)] | 2+ |αF[Er(t-τ)★E0(t)] | 2 + 2R { αF[Er(t-τ)] *·F [Er(t-τ)★E0(t)]}。

    Method and system for optical timing transfer

    公开(公告)号:US12273145B2

    公开(公告)日:2025-04-08

    申请号:US18126663

    申请日:2023-03-27

    Inventor: Hitoshi Kiuchi

    Abstract: A forward optical intensity modulation signal, generated by optical intensity-modulating a laser signal using a forward microwave phase modulation signal, is transmitted from a base to a remote station. A backward microwave phase modulation signal, in which frequency of the forward microwave phase modulation signal is changed by demodulating the forward optical intensity modulation signal, is generated, and a backward optical intensity modulation signal, generated by optical intensity-modulating the laser signal using the backward microwave phase modulation signal, is transmitted from the remote station to the base. The backward microwave phase modulation signal is extracted by photoelectric converting the backward optical intensity modulation signal, a round trip timing is extracted by demodulating the backward microwave phase modulation signal, and transmission delay is determined from a difference between the timing and the round trip timing.

    OPTICAL OSCILLATOR
    30.
    发明申请

    公开(公告)号:US20220059982A1

    公开(公告)日:2022-02-24

    申请号:US17275952

    申请日:2019-09-13

    Abstract: An optical oscillator according to an embodiment includes a first reflecting portion that transmits light having a first wavelength and reflects light having a second wavelength different from the first wavelength, a second reflecting portion that forms an unstable resonator together with the first reflecting portion and reflect light having the second wavelength, a laser medium that is disposed between the first reflecting portion and the second reflecting portion and emits light having the second wavelength due to incidence of light having the first wavelength, and a saturable absorption portion disposed on a side opposite to the first reflecting portion when viewed from the laser medium in the one direction, the first reflecting portion includes an incidence surface on which light having the first wavelength is incident, on a side opposite to the laser medium, a size of the second reflecting portion is smaller than a size of the first reflecting portion when viewed in the one direction, at least a part of a surface of the saturable absorption body on the side opposite to the laser medium includes a curved region curved toward the laser medium side, and the second reflecting portion is a dielectric multilayer film provided in the curved region.

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