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    • 21. 发明授权
    • Wavelength tracking system using an optical spectrum analyzer and a wavelength tunable light source
    • 使用光谱分析仪和波长可调光源的波长跟踪系统
    • US06512582B1
    • 2003-01-28
    • US09526346
    • 2000-03-16
    • Tohru MoriSeiji Funakawa
    • Tohru MoriSeiji Funakawa
    • G01J306
    • G01J3/06
    • In order to start sweeping an optical spectrum analyzer 1 and a wavelength tunable light source 14 on the same timing, a motor 6 for driving a spectroscope 4 in the optical spectrum analyzer 1 is controlled. To this end, a drive circuit 7 outputs a control signal to determine the timing where the motor 6 starts to rotate. A wavelength control circuit 19 in the wavelength tunable light source 14 controls the sweep of the wavelength of single-mode oscillation from a light source unit 20 and starts sweeping the light source unit 20 in response to a signal externally supplied to control the timing of sweep start. As a result, the sweep of the wavelength being measured with the optical spectrum analyzer 1 and that of the wavelength of single-mode oscillation from the wavelength tunable light source 14 are started on the same timing and high-speed sweep is achieved.
    • 为了在同一时刻开始扫描光谱分析仪1和波长可调谐光源1​​4,控制用于驱动光谱分析仪1中的分光镜4的电动机6。 为此,驱动电路7输出控制信号以确定电动机6开始旋转的定时。 波长可调光源14中的波长控制电路19控制来自光源单元20的单模振荡的波长的扫描,并响应于外部提供的信号开始扫描光源单元20,以控制扫描的定时 开始。 结果,在相同的定时开始用光谱分析仪1测量的波长的扫描和来自波长可调光源14的单模振荡的波长的扫描,并且实现高速扫描。
    • 22. 发明授权
    • Device and a method for evaluating an optical amplifier
    • 装置及评估光放大器的方法
    • US5917649A
    • 1999-06-29
    • US794244
    • 1997-01-31
    • Tohru MoriMasafumi Koga
    • Tohru MoriMasafumi Koga
    • G01M11/00G02F1/35H01S3/00H01S3/06H01S3/067H01S3/10G01N21/00
    • H04B10/0731H04B10/07
    • An optical amplifier evaluating device has a wavelength multiplex signal light generating section, and an O/E converter, and a frequency discriminating and power detecting device, and a computing section. The wavelength multiplex signal light generating section generates an wavelength multiplex signal light which includes signal lights having different wavelengths and having intensity envelopes modulated by different modulation frequencies which are enough higher than an atom life time in a high energy level or a carrier life time in an amplification medium of an optical amplifier to be evaluated, and supplies the wavelength multiplex signal light to the optical amplifier. The O/E converter converts an output light of the optical amplifier to an electric signal. The frequency discriminating and power detecting section detects signal powers of frequency spectrums which are included in the electric signal and respectively correspond to the modulation frequencies of the signal lights, and detects a noise power of the electric signal at a frequency band which is apart from the modulation frequencies. The computing section determines gains and noise figures of the wavelength multiplex amplification by the optical amplifier based on the signal powers and the noise power wavelength by wavelength.
    • 光放大器评估装置具有波长多路复用信号光发生部分,O / E转换器,鉴频和功率检测装置以及计算部分。 波长多路复用信号光产生部分产生波长多路复用信号光,其包括具有不同波长的信号光,并且具有由不同调制频率调制的强度包络,其高于在高能级或载波寿命中的原子寿命 放大介质,并将波长复用信号光提供给光放大器。 O / E转换器将光放大器的输出光转换成电信号。 频率鉴别和功率检测部分检测包括在电信号中的频谱的信号功率,并分别对应于信号光的调制频率,并且检测在除了信号光的频带之外的电信号的噪声功率 调制频率。 计算部分基于信号功率和波长的噪声功率波长来确定光放大器的波长多路复用放大的增益和噪声系数。
    • 23. 发明授权
    • Method and device for measuring a noise figure in optical amplifiers
    • 用于测量光放大器噪声系数的方法和装置
    • US5677781A
    • 1997-10-14
    • US593390
    • 1996-01-29
    • Tohru MoriKazuo Aida
    • Tohru MoriKazuo Aida
    • G02F1/35G01M11/02H04B3/46H04B10/07H04B10/2507H04B10/291H04B10/524H04B10/54H04B17/00H04B10/16
    • H04B10/0731H04B10/07
    • A method and device for automatically and accurately measuring a noise figure of an optical amplifier are disclosed. In the method, light pulses which have different wavelengths .lambda..sub.1 .about..lambda..sub.n and have a period shorter than a time constant of extinction of the optical amplifier are generated. The light pulses thus generate are supplied to the optical amplifier. Powers P.sub.AMP1 .about.P.sub.AMPn of amplified lights outputted from the optical amplifier which correspond to the light pulses and have the wavelength .lambda..sub.1 .about..lambda..sub.n and powers P.sub.ASE1 .about.P.sub.ASEn of lights which have the wavelength .lambda..sub.1 .about..lambda..sub.n and are outputted from the optical amplifier when the amplified lights are not outputted from the optical amplifier are measured. Noise figures NF.sub.1 .about.NF.sub.n at the wavelengths .lambda..sub.1 .about..lambda..sub.n the optical amplifier are calculated according to the following equation. NF.sub.k =(P.sub.ASEk /h.nu..sub.k G.sub.k Bo)+(1/G.sub.k) (k=1.about.n) In the above equation, h is Planck's constant; .nu..sub.k (k=1.about.n) are light frequencies of the light pulses; G.sub.k (k=1.about.n) are gains at the wavelengths .lambda..sub.k (k=1.about.n) of the optical amplifier; and Bo is a band width of a pass band of an instrument which is used for measuring the power P.sub.ASE1 .about.P.sub.ASEn.
    • 公开了一种用于自动且精确地测量光放大器的噪声系数的方法和装置。 在该方法中,产生具有不同波长λ1比值λn并且具有比光放大器的消光时间常数短的周期的光脉冲。 因此产生的光脉冲被提供给光放大器。 对与光脉冲相对应并且具有波长λ1差分λn的光放大器输出的放大光的PAMP1差分PAMPn,并且对波长λ1为差分λn并从光放大器输出的光的PASE1差分PASE 当不从光放大器输出放大的光时。 根据以下等式计算波长为λ1的波长λ1差值λn的噪声系数NF1差值NFn .NFk =(PASEk / h nu kGkBo)+(1 / Gk)(k = 1 DIFFERENCE n)在上述等式 h是普朗克常数; nu k(k = 1 DIFFERENCE n)是光脉冲的光频率; Gk(k = 1 DIFFERENCE n)是光放大器的波长λk(k = 1 DIFFERENCE n)处的增益; Bo是用于测量功率PASE1差分PASEn的仪器的通带的带宽。
    • 25. 发明授权
    • Image processing system for area filling of graphics
    • 图像区域填充图像处理系统
    • US4763119A
    • 1988-08-09
    • US853802
    • 1986-04-18
    • Shigeru MatsubaraTohru MoriToshiroh Tabata
    • Shigeru MatsubaraTohru MoriToshiroh Tabata
    • G06F3/153G06T11/40G09G1/14
    • G06T11/40
    • An area fill technique for graphic images is disclosed wherein the contour lines constituting an image are given in a series of line segments or a series of vectors, and horizontal line segments are ignored. Each line segment other than the horizontal ones is specified by the coordinate addresses for the start and end points in one direction, that is, from top to bottom or from bottom to top. Each is then converted into approximate pixels in the X-Y coordinate system, and stored in a random access work memory. The pixels of each line segment are stored in the work memory according to a rule whereby each line segment is represented by one pixel per horizontal line, and is written by taking exclusive OR of its pixels, excluding the start point, with read pixel data at corresponding coordinate addresses in the work memory. Thus, an even number of contour line pixels exist in each horizontal line in the work memory, and, area fill can be realized by scanning each horizontal line in the work memory and turning on pixel memory cells from an odd numbered contour line pixel to an even numbered contour line pixel. This technique makes it possible to easily perform area fill even for complicated images.
    • 公开了一种用于图形图像的区域填充技术,其中构成图像的轮廓线以一系列线段或一系列向量给出,并且忽略水平线段。 除水平线之外的每个线段由一个方向的起点和终点的坐标地址,即从上到下或从下到上指定。 然后将每个图像转换成X-Y坐标系中的近似像素,并存储在随机存取工作存储器中。 每个线段的像素根据规则被存储在工作存储器中,每个线段由每个水平线上的一个像素表示,并且通过将除了开始点之外的其像素的异或与其中的像素数据进行写入来写入 相应的坐标地址在工作存储器中。 因此,在工作存储器中的每条水平线上都存在偶数轮廓线像素,并且可以通过扫描工作存储器中的每条水平线并将像素存储单元从奇数轮廓线像素接通到 偶数轮廓线像素。 这种技术使得即使对于复杂的图像也可以容易地执行区域填充。