Apparatus and method for sensing parameters using Fiber Bragg Grating (FBG) sensor and comparator

    公开(公告)号:US09726538B2

    公开(公告)日:2017-08-08

    申请号:US14513458

    申请日:2014-10-14

    Applicant: OPTILAB, LLC

    Inventor: Henry H. Hung

    Abstract: Various implementations of an apparatus for sensing one or more parameters are disclosed herein. The apparatus includes a sweeping wavelength laser configured to generate a sweeping wavelength optical signal; an optical fiber including a Fiber Bragg Grating (FBG) structure configured to sense a parameter, wherein the optical fiber is configured to receive the sweeping wavelength optical signal, wherein the FBG structure is configured to produce a reflected optical signal with a particular wavelength in response to the sweeping wavelength optical signal, and wherein the particular wavelength varies as a function of the parameter; a photo detector configured to generate an electrical signal based on the reflected optical signal; a comparator configured to generate a pulse based on a comparison of the electrical signal to a threshold; and a processor configured to generate an indication of the parameter based on the pulse. The comparator may be configured as a Schmitt trigger.

    Waveform reconstruction device, waveform reconstruction system, and waveform reconstruction method
    5.
    发明授权
    Waveform reconstruction device, waveform reconstruction system, and waveform reconstruction method 有权
    波形重建装置,波形重建系统和波形重建方法

    公开(公告)号:US08886037B2

    公开(公告)日:2014-11-11

    申请号:US13254624

    申请日:2010-03-02

    CPC classification number: G01J11/00 G01J3/02 G01J3/0213 G01J3/0218 G01J3/0245

    Abstract: Provided is a waveform reconstruction device capable of easily reconstructing an accurate time waveform of an optical signal without using an ultrafast time gate or a reference light source. A waveform reconstruction device (140) includes: a phase spectrum calculation unit (143) which (i) calculates a power spectrum of an output optical signal for each of a plurality of intensities of an input optical signal, when a phase spectrum of the input optical signal having the plurality of intensities is assumed to have a given phase spectrum, by simulating, using a parameter related to self-phase modulation of an optical fiber, propagation of the input optical signal through the optical fiber, and (ii) calculates, as the phase spectrum of the input optical signal, the given phase spectrum when a difference value between the calculated power spectrum and a measured power spectrum is equal to or less than a threshold value; and a waveform reconstruction unit (144) which reconstructs the time waveform of the input optical signal by performing frequency-time transform on the calculated phase spectrum and the power spectrum of the input optical signal.

    Abstract translation: 提供一种波形重构装置,能够容易地重构光信号的精确时间波形而不使用超快时间门或参考光源。 波形重建装置(140)包括:相位谱计算单元(143),其对于输入光信号的多个强度中的每一个计算输出光信号的功率谱,当输入的相位谱 假设具有多个强度的光信号具有给定的相位频谱,通过使用与光纤的自相位调制有关的参数,通过光纤传播输入光信号,并且(ii) 作为输入光信号的相位频谱,当所计算的功率谱与测量的功率谱之间的差值等于或小于阈值时,给定的相位频谱; 以及波形重构单元(144),通过对计算出的相位频谱和输入光信号的功率谱进行频率 - 时间变换来重构输入光信号的时间波形。

    Systems and methods for fiber optic parametric amplification and nonlinear optical fiber for use therein
    6.
    发明授权
    Systems and methods for fiber optic parametric amplification and nonlinear optical fiber for use therein 有权
    用于光纤参数放大和非线性光纤的系统和方法

    公开(公告)号:US08482847B2

    公开(公告)日:2013-07-09

    申请号:US13444792

    申请日:2012-04-11

    Abstract: A high confinement nonlinear optical fiber is provided along with methods of parametric amplification for use thereof. The nonlinear optical fiber may include a plurality of concentric layers which are configured to provide different guiding regimes to low-frequency and high-frequency components through transverse geometry and refractive index profiling, thus reducing waveguide dispersion. The resulting optical fiber provides a parametric device with phase-matching in any spectral region of interest, such that a fiber optic parametric amplifier (FOPA) implementing the optical fiber can amplify in any spectral window of interest. A narrow-band FOPA configured to minimize phase mismatching is also provided for use with the optical fiber, and may be implemented as a light source or a monochromator.

    Abstract translation: 提供高约束非线性光纤以及用于其的参数放大方法。 非线性光纤可以包括多个同心层,其被配置为通过横向几何形状和折射率分布为低频和高频分量提供不同的引导方式,从而减少波导色散。 所得到的光纤在感兴趣的任何光谱区域中提供具有相位匹配的参数设备,使得实现光纤的光纤参数放大器(FOPA)可以在感兴趣的任何光谱窗口中放大。 配置为最小化相位失配的窄带FOPA也被提供用于光纤,并且可以被实现为光源或单色器。

    SYSTEMS AND METHODS FOR FIBER OPTIC PARAMETRIC AMPLIFICATION AND NONLINEAR OPTICAL FIBER FOR USE THEREIN
    8.
    发明申请
    SYSTEMS AND METHODS FOR FIBER OPTIC PARAMETRIC AMPLIFICATION AND NONLINEAR OPTICAL FIBER FOR USE THEREIN 有权
    光纤参数放大系统与方法及其使用的非线性光纤

    公开(公告)号:US20120257270A1

    公开(公告)日:2012-10-11

    申请号:US13444792

    申请日:2012-04-11

    Abstract: A high confinement nonlinear optical fiber is provided along with methods of parametric amplification for use thereof. The nonlinear optical fiber may include a plurality of concentric layers which are configured to provide different guiding regimes to low-frequency and high-frequency components through transverse geometry and refractive index profiling, thus reducing waveguide dispersion. The resulting optical fiber provides a parametric device with phase-matching in any spectral region of interest, such that a fiber optic parametric amplifier (FOPA) implementing the optical fiber can amplify in any spectral window of interest. A narrow-band FOPA configured to minimize phase mismatching is also provided for use with the optical fiber, and may be implemented as a light source or a monochromator.

    Abstract translation: 提供高约束非线性光纤以及用于其的参数放大方法。 非线性光纤可以包括多个同心层,其被配置为通过横向几何形状和折射率分布为低频和高频分量提供不同的引导方式,从而减少波导色散。 所得到的光纤在感兴趣的任何光谱区域中提供具有相位匹配的参数设备,使得实现光纤的光纤参数放大器(FOPA)可以在感兴趣的任何光谱窗口中放大。 配置为最小化相位失配的窄带FOPA也被提供用于光纤,并且可以被实现为光源或单色器。

    BROADBAND OR MID-INFRARED FIBER LIGHT SOURCES
    9.
    发明申请
    BROADBAND OR MID-INFRARED FIBER LIGHT SOURCES 有权
    宽带或中红外光纤光源

    公开(公告)号:US20120239013A1

    公开(公告)日:2012-09-20

    申请号:US13241900

    申请日:2011-09-23

    Abstract: A broadband light source includes one or more laser diodes that are capable of generating a pump signal having a wavelength shorter than 2.5 microns, a pulse width of at least 100 picoseconds and a pump optical spectral width. The light source also includes one or more optical amplifiers that are coupled to the pump signal and are capable of amplifying the pump signal to a peak power of at least 500 W. The light source further includes a first fiber that is coupled to the one or more optical amplifiers. The first fiber including an anomalous group-velocity dispersion regime and a modulational instability mechanism that operates to modulate the pump signal. The light source also includes a nonlinear element that is coupled to the first fiber that is capable of broadening the pump optical spectral width to at least 100 nm through a nonlinear effect in the nonlinear element.

    Abstract translation: 宽带光源包括能够产生波长短于2.5微米的泵浦信号,至少100皮秒的脉冲宽度和泵浦光谱宽度的一个或多个激光二极管。 光源还包括耦合到泵浦信号并且能够将泵浦信号放大到至少500W的峰值功率的一个或多个光放大器。光源还包括第一光纤,其耦合到一个或 更多的光放大器。 第一光纤包括异常组 - 速度色散方案和用于调制泵浦信号的调制不稳定机制。 光源还包括耦合到第一光纤的非线性元件,其能够通过非线性元件中的非线性效应将泵浦光谱宽度扩展至至少100nm。

    WAVEFORM RECONSTRUCTION DEVICE, WAVEFORM RECONSTRUCTION SYSTEM, AND WAVEFORM RECONSTRUCTION METHOD
    10.
    发明申请
    WAVEFORM RECONSTRUCTION DEVICE, WAVEFORM RECONSTRUCTION SYSTEM, AND WAVEFORM RECONSTRUCTION METHOD 有权
    波形重建设备,波形重建系统和波形重建方法

    公开(公告)号:US20110311223A1

    公开(公告)日:2011-12-22

    申请号:US13254624

    申请日:2010-03-02

    CPC classification number: G01J11/00 G01J3/02 G01J3/0213 G01J3/0218 G01J3/0245

    Abstract: Provided is a waveform reconstruction device capable of easily reconstructing an accurate time waveform of an optical signal without using an ultrafast time gate or a reference light source. A waveform reconstruction device (140) includes: a phase spectrum calculation unit (143) which (i) calculates a power spectrum of an output optical signal for each of a plurality of intensities of an input optical signal, when a phase spectrum of the input optical signal having the plurality of intensities is assumed to have a given phase spectrum, by simulating, using a parameter related to self-phase modulation of an optical fiber, propagation of the input optical signal through the optical fiber, and (ii) calculates, as the phase spectrum of the input optical signal, the given phase spectrum when a difference value between the calculated power spectrum and a measured power spectrum is equal to or less than a threshold value; and a waveform reconstruction unit (144) which reconstructs the time waveform of the input optical signal by performing frequency-time transform on the calculated phase spectrum and the power spectrum of the input optical signal.

    Abstract translation: 提供一种波形重构装置,能够容易地重构光信号的精确时间波形而不使用超快时间门或参考光源。 波形重建装置(140)包括:相位谱计算单元(143),其对于输入光信号的多个强度中的每一个计算输出光信号的功率谱,当输入的相位谱 假设具有多个强度的光信号具有给定的相位频谱,通过使用与光纤的自相位调制有关的参数,通过光纤传播输入光信号,并且(ii) 作为输入光信号的相位频谱,当所计算的功率谱与测量的功率谱之间的差值等于或小于阈值时,给定的相位频谱; 以及波形重构单元(144),通过对计算出的相位频谱和输入光信号的功率谱进行频率 - 时间变换来重构输入光信号的时间波形。

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