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公开(公告)号：US4758086A
公开(公告)日：1988-07-19
申请号：US7350
申请日：1987-01-27
CPC分类号： G01J3/447 , G01J1/4257 , G01J3/1256 , G01J3/18 , G01J3/36
摘要： In an optical measuring apparatus, a laser beam is transferred to a diffraction grating so that the laser beam is spectrally separated into respective wavelength components. The wavelength components are sequentially guided into a polarizing optical element in which the respective wavelength component are separated into S and P polarized components, when the diffraction grating is rotated. The S and P polarized components of the respective wavelengths are detected by photodetectors and electrical signals from the photodetectors are supplied to a signal processing unit. In the signal processing unit, the electrical signals corresponding to the P and S components are corrected with a spectral efficiency characteristic of the grating, a percent loss characteristic of the polarizing element and photoelectro conversion characteristics of the photodetectors and the corrected signals are analyzed to obtain an absolute value of the laser energy for the respective wavelength.
摘要翻译： 在光学测量装置中，将激光束转移到衍射光栅，使得激光束被光谱分离成各个波长分量。 当衍射光栅旋转时，波长分量被顺序地引导到偏振光学元件中，其中各个波长分量被分离成S和P偏振分量。 各波长的S和P偏振分量由光检测器检测，并且来自光电检测器的电信号被提供给信号处理单元。 在信号处理单元中，用光栅的光谱效率特性校正与P和S分量相对应的电信号，分析偏振元件的百分比损耗特性和光电检测器的光电转换特性和校正信号，以获得 相应波长的激光能量的绝对值。
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公开(公告)号：US4643572A
公开(公告)日：1987-02-17
申请号：US635297
申请日：1984-07-27
申请人： Youji Sonobe , Youichi Tamura , Kenichiro Umesaki
发明人： Youji Sonobe , Youichi Tamura , Kenichiro Umesaki
CPC分类号： G01J3/06 , G01J2003/062
摘要： A driving circuit for rotating the grating of a monochromator thereby changing the wavelength of light which is emitted from the monochromator. This driving circuit includes an operating panel for supplying wavelength data, a data converting circuit which obtains a trigonometric function value corresponding to the wavelength data when the data converting circuit receives the wavelength data, and which converts the wavelength data to angle data on the basis of the trigonometric function value, and a motor driver for rotating the grating into the angular position corresponding to the angle data.
摘要翻译： 用于旋转单色仪的光栅的驱动电路，从而改变从单色仪发射的光的波长。 该驱动电路包括用于提供波长数据的操作面板，数据转换电路，其在数据转换电路接收波长数据时获得与波长数据对应的三角函数值，并且基于以下方式将波长数据转换为角度数据： 三角函数值和用于将光栅旋转到对应于角度数据的角位置的电动机驱动器。
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3.发明授权公开(公告)号：US06236452B1
公开(公告)日：2001-05-22
申请号：US09214686
申请日：1999-01-08
申请人： Hiroshi Goto , Yukio Tsuda , Youji Sonobe
发明人： Hiroshi Goto , Yukio Tsuda , Youji Sonobe
IPC分类号： G01N2100
CPC分类号： H04B10/0731 , G01M11/30 , H04B10/07 , H04B10/077 , H04B10/07955
摘要： This invention is applied to an optical amplifier evaluation method of modulating by an optical modulator 23 light output from a light source 1 into a rectangular optical signal which is enabled/disabled in a predetermined period, then applying the optical signal to an optical fiber amplifier 2 to be measured, and obtaining the gain and noise figure of the optical fiber amplifier from the light intensities in the ON and OFF periods of an optical signal output from the optical fiber amplifier and the light intensity in the ON period of an optical signal input to the optical fiber amplifier. Output light from the optical fiber amplifier in a no-input state is passed through an optical path extending from the light source to the optical fiber amplifier and an optical path extending from the optical fiber amplifier to a light intensity measurement position, thereby obtaining optical losses on the respective optical paths. By the obtained optical losses, the light intensities are corrected. As a result, the gain G and noise figure NF of the optical fiber amplifier 2 can be attained with high precision.
摘要翻译： 本发明应用于通过光调制器23将从光源1输出的光调制成在预定周期内被允许/禁止的矩形光信号的光放大器评估方法，然后将光信号施加到光纤放大器2 并且从光纤放大器输出的光信号的导通和截止周期的光强度和光信号输入的导通期间的光强度的光强度获得光纤放大器的增益和噪声系数， 光纤放大器。 来自光纤放大器的无输入状态的输出光通过从光源延伸到光纤放大器的光路以及从光纤放大器延伸到光强测量位置的光路，从而获得光损耗 在各个光路上。 通过获得的光损耗，校正光强度。 结果，可以高精度地获得光纤放大器2的增益G和噪声系数NF。
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