Convolution method for the measurement of laser bandwidth

    公开(公告)号:JP2005500527A

    公开(公告)日:2005-01-06

    申请号:JP2003521302

    申请日:2002-07-25

    Abstract: 本発明は、レーザーの帯域幅が分光計のスリット関数に比べて大きくない環境の下で、分光計を使って得られた帯域幅データに基づいて、超狭帯域レーザービームの帯域幅データを計算するための、簡単で信頼でき、使い易い方法を提供する。 分光計のスリット関数が求められる(20)。 レーザービームのスペクトルデータは、分光計を使って測定され、レーザービームのスペクトルと分光計のスリット関数のコンボルーションを表す、測定されたレーザービームのスペクトルを作る(76)。 この測定されたレーザースペクトルは、次に、分光計のスリット関数と数学的にコンボルブされ、二重にコンボルブされたスペクトルが作られる。 真のレーザー帯域幅を表す帯域幅値は、測定されたレーザースペクトルと二重にコンボルブされたスペクトルから求められる。 真のレーザー帯域幅は、「測定されたレーザー帯域幅の2倍」と、対応する「二重にコンボルブされた帯域幅」の間の差を求めることによって算定されるのが望ましい。 本方法は、「測定されたレーザー帯域幅の2倍」が2つのレーザー帯域幅と2つの分光計のスリット関数帯域幅とを表し、「二重にコンボルブされた帯域幅」が1つのレーザー帯域幅と2つの分光計のスリット関数帯域幅とを表すので、真のレーザー帯域幅を上手く見積もることができる。 而して、この差が、真のレーザー帯域幅を表すことになる。 好適な実施形態では、測定された帯域幅のパラメータは、半値全幅帯域幅と95%の積分帯域幅である。
    【選択図】図1

    HIGH RESOLUTION MEMS-BASED HADAMARD SPECTROSCOPY
    27.
    发明申请
    HIGH RESOLUTION MEMS-BASED HADAMARD SPECTROSCOPY 审中-公开
    高分辨率基于MEMS的HADAMARD光谱

    公开(公告)号:WO2014159544A1

    公开(公告)日:2014-10-02

    申请号:PCT/US2014/024111

    申请日:2014-03-12

    Abstract: A spectrometer includes: a collimating element configured for collimating a beam of light into a first one of a cross-dispersing element and an echelle grating, the grating in optical communication with the cross-dispersing element; a focusing element for receiving the light from a second one of the cross-dispersing element and the echelle grating and focusing wavelengths of the light onto a spatial light modulator; the spatial light modulator configured for selectively directing the wavelengths onto a detector for detection. A method of use and the method of fabrication are provided.

    Abstract translation: 光谱仪包括:准直元件,其被配置用于将光束准直到交叉分散元件和电梯片格栅中的第一个中,所述光栅与交叉分散元件光学连通; 聚焦元件,用于接收来自所述交叉分散元件和所述梯形光栅中的第二个的光,并将所述光的波长聚焦到空间光调制器上; 所述空间光调制器被配置用于将波长选择性地引导到检测器上用于检测。 提供了一种使用方法和制造方法。

    ECHELLE SPECTROMETER ARRANGEMENT USING INTERNAL PREDISPERSION
    28.
    发明申请
    ECHELLE SPECTROMETER ARRANGEMENT USING INTERNAL PREDISPERSION 审中-公开
    具有内部预分散的光谱仪安排

    公开(公告)号:WO2010086283A3

    公开(公告)日:2010-11-25

    申请号:PCT/EP2010050774

    申请日:2010-01-25

    Abstract: An echelle spectrometer arrangement (10) with internal order separation contains an echelle grating (34) and a dispersing element (38) for order separation so that a two-dimensional spectrum having a plurality of separate orders (56) can be generated, an imaging optical system (18, 22, 28, 46), a flat-panel detector (16), and predispersion means (20) for predispersing the radiation into the direction of traverse dispersion of the dispersion element (38). The arrangement is characterized in that the predispersion means (20) comprise a predispersion element which is arranged along the optical path behind the inlet spacing (12) inside the spectrometer arrangement. The imaging optical system is designed in such a manner that the predispersed radiation can be imaged onto an additional image plane (24) which does not have any boundaries in the predispersion direction and which is arranged along the optical path between the predispersion element (20) and the echelle grating (34). Optical means (20, 68) in the area of the predispersed spectrum are arranged to influence the spatial and/or the spectral beam density distribution on the detector (16).

    Abstract translation: 中阶梯光谱仪装置(10)具有内部顺序分离包含该订单的分离的阶梯光栅(34)和分散元件(38),从而产生与多个单独的命令(56)的二维频谱,成像光学系统(18 ,22,28,46),一个表面检测器(16),和Vordispersionsmittel(20)(在分散体38)的横向分散体的方向上的辐射的预分散体。 该装置的特征在于,所述Vordispersionsmittel(20)包括其沿着光谱仪组件内的入口狭缝(12)的后面的光路布置在vordispergierendes元件,所述成像光学器件被配置为使得在一个附加的预分散辐射 在Vordispersionsrichtung限制自由图像平面(24)可以被成像,这是沿着vordispergierendem元件(20)之间的光路设置与阶梯光栅(34)和光学装置(20,68)在预分散的频谱的用于影响的空间位置和 /或设置在检测器(16)上的光谱辐射亮度分布。

    METHOD FOR THE ANALYSIS OF ECHELLE SPECTRA
    29.
    发明申请
    METHOD FOR THE ANALYSIS OF ECHELLE SPECTRA 审中-公开
    程序。评估ECHELLE谱

    公开(公告)号:WO0239077A3

    公开(公告)日:2002-10-17

    申请号:PCT/EP0112750

    申请日:2001-11-03

    Abstract: A method for the wavelength calibration of echelle spectra, in which the wavelengths are distributed across number of orders is characterised by the steps: recording of a line-rich reference spectrum with known wavelengths for a number of the lines, determination of the position of a number of peaks of the reference spectrum in the recorded spectrum, selection of at least two first lines of known order, position and wavelength, determination of a wavelength scale for the order in which the known lines lie, by means of a fit function gamma m (x), determination of a provisional wavelength scale gamma (x) for at least one neighbouring order m 1, by means of addition/subtraction of a wavelength difference gamma FSR which corresponds to a free spectral region, according to gamma m 1(x) = gamma m (x) gamma FSR with gamma FSR= gamma m(x)/m, determination of the wavelengths of lines in said neighbouring order m 1, by means of the provisional wavelength scale gamma 1(x), replacement of the provisional wavelength of at least two lines by the reference wavelength for said lines as obtained in step (a) and repeat of steps (d) to (g) for at least one further neighbouring order.

    Abstract translation: 一种用于Echellespektren的波长校准方法,其分布在多个订单的波长,其特征在于以下步骤:接收具有已知波长的富线参考频谱的多条线,确定在所述捕获的多个参考光谱的峰的位置 光谱,选择至少两个第一线与已知的顺序,位置和波长。 确定的波长尺度对于其中已知线的顺序,通过拟合函数的λM(X),确定临时波长标度的λ米+/- 1(x)的至少一个相邻的m阶由加/减的波长差+/- 1 通过拉姆达米+/- 1(x)的对应于自由光谱范围DELTA拉姆达FSR =拉姆达M(X)+/- DELTA拉姆达FSR,与DELTA拉姆达=拉姆达FSR M(X)/米。 通过临时波长标度的λm表示,确定线路的波长在该相邻的m阶+/- 1 +/- 1(x)时,由下面的步骤替换至少两行的临时波长(a)中规定的Refernzwellenlänge图像此线,并重复步骤 (d)至(g)对于至少一个另外的相邻顺序。

    METHOD FOR THE ANALYSIS OF ECHELLE SPECTRA
    30.
    发明申请
    METHOD FOR THE ANALYSIS OF ECHELLE SPECTRA 审中-公开
    评估曙红光谱的方法

    公开(公告)号:WO02039077A2

    公开(公告)日:2002-05-16

    申请号:PCT/EP2001/012750

    申请日:2001-11-03

    Abstract: A method for the wavelength calibration of echelle spectra, in which the wavelengths are distributed across number of orders is characterised by the steps: recording of a line-rich reference spectrum with known wavelengths for a number of the lines, determination of the position of a number of peaks of the reference spectrum in the recorded spectrum, selection of at least two first lines of known order, position and wavelength, determination of a wavelength scale for the order in which the known lines lie, by means of a fit function gamma m (x), determination of a provisional wavelength scale gamma (x) for at least one neighbouring order m 1, by means of addition/subtraction of a wavelength difference gamma FSR which corresponds to a free spectral region, according to gamma m 1(x) = gamma m (x) gamma FSR with gamma FSR= gamma m(x)/m, determination of the wavelengths of lines in said neighbouring order m 1, by means of the provisional wavelength scale gamma 1(x), replacement of the provisional wavelength of at least two lines by the reference wavelength for said lines as obtained in step (a) and repeat of steps (d) to (g) for at least one further neighbouring order.

    Abstract translation: 一种用于Echellespektren的波长校准方法,其分布在多个订单的波长,其特征在于以下步骤:接收具有已知波长的富线参考频谱的多条线,确定在所述捕获的多个参考光谱的峰的位置 光谱,选择至少两条已知次序,位置和波长的第一行。 确定的波长尺度对于其中已知线的顺序,通过拟合函数的λM(X),确定临时波长标度的λ米+/- 1(x)的至少一个相邻的m阶由加/减的波长差+/- 1 DELTAλFSR,其对应于根据λm +/- 1(x)=λm(x)+/-ΔλFSR的自由光谱范围,其中ΔλλFSR =λm(x)/ m。 通过临时波长标度的λm表示,确定线路的波长在该相邻的m阶+/- 1 +/- 1(x)时,由下面的步骤替换至少两行的临时波长(a)中规定的Refernzwellenlänge图像此线,并重复步骤 (d)至(g)进行至少一个另外的相邻订单。

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