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    • 21. 发明公开
    • Electro-optic delay line discriminator
    • ElektrooptischerVerzögerungsleitungs-discriminator
    • EP1701186A1
    • 2006-09-13
    • EP06251241.3
    • 2006-03-08
    • Agilent Technologies, Inc.
    • Karlquist, Richard K.
    • G02B6/28H03D13/00G01R23/17H04B10/12
    • G01R23/175G01R23/17
    • An electro-optic delay line frequency discriminator (10) has an optical signal source (22) providing first (24a) and second (24b) optical signals that are directed along first (A) and second (B) paths, respectively; in the first path, the first optical signal is converted to a first corresponding optical signal that corresponds to an electrical input signal, and the first corresponding optical signal is then delayed, and in the second path, the second optical signal is delayed, and the delayed second optical signal is then converted to a second corresponding optical signal that corresponds to the electrical input signal. The delayed first corresponding optical signal and second corresponding optical signal are converted to first (18a) and second (18b) corresponding electrical signals, respectively; a detector (48), responsive to the first and second corresponding electrical signals, provides an electrical output signal (18) from the discriminator. Optical source relative intensity noise (RIN) is canceled out and does not degrade the signal-to-noise ratio of the discriminator output.
    • 电光延迟线鉴频器(10)具有分别提供沿着第一(A)和第二(B)路径引导的第一(24a)和第二(24b)光信号的光信号源(22) 在第一路径中,将第一光信号转换为对应于电输入信号的第一对应的光信号,然后第一对应的光信号被延迟,并且在第二路径中,第二光信号被延迟,并且 然后延迟的第二光信号被转换成对应于电输入信号的第二对应的光信号。 延迟的第一对应光信号和第二对应光信号分别转换为第一(18a)和第二(18b)对应的电信号; 响应于第一和第二对应电信号的检测器(48)从鉴别器提供电输出信号(18)。 光源相对强度噪声(RIN)被抵消,并且不会降低鉴别器输出的信噪比。
    • 24. 发明公开
    • Surface acoustic wave spectrum analyzer
    • AkustischerOberflächenwellen-Spektrumanalysator。
    • EP0309003A2
    • 1989-03-29
    • EP88117878.4
    • 1985-02-07
    • TRW INC.
    • Stokes, Robert BruceYen, Kuo-HsiungLau, Kei-FungKagiwada, Reynold ShigeruDelaney, Michael Joseph
    • G01R23/17H03H9/145
    • H03H9/1455G01R23/17
    • A surface acoustic wave (SAW) device con­figured to operate as a spectrum analyzer, and having an array of input transducers disposed on a substrate in such positions as to produce a focused beam of acoustic energy at a focal arc, each position on the arc being representative of an input signal frequency. Output transducers produce electrical signals corres­ponding to the energy received at successive segments of the focal arc. The disclosed device includes various combinations of input transducer array improve­ments, some of which are to provide amplitude weighting of the input array, including aperture width weighting, capacitive weighting, resistive weighting, series­parallel weighting, and source withdrawal weighting. Another improvement in input array configuration eliminates close or overlapping electrodes of opposite polarities and thereby reduces parasitic capacitance and acoustic radiation between electrode elements. The use of curved input transducer fingers improves opera­tion of the tranducers as point sources. Other im­portant improvements include the use of acoustic transducers before to transmit the focused output energy from the focal line to conventional output transducers, thereby improving frequency resolution, and the use of electromagnetic waveguides to transmit energy from output transducers located on the focal line.
    • 一种表面声波(SAW)装置,被配置为作为频谱分析仪进行操作,并且具有设置在基板上的输入换能器阵列,以便在聚焦弧处产生聚焦的声能束的位置,弧上的每个位置 代表输入信号频率。 输出换能器产生对应于在焦弧的连续段处接收的能量的电信号。 所公开的设备包括输入换能器阵列改进的各种组合,其中一些提供输入阵列的幅度加权,包括孔径宽度加权,电容加权,电阻加权,串联并行加权和源提取加权。 输入阵列配置的另一改进消除了相反极性的紧密或重叠的电极,从而降低了电极元件之间的寄生电容和声辐射。 使用弯曲的输入传感器手指可以改善传感器作为点源的运行。 其他重要的改进包括在将聚焦输出能量从焦线传输到常规输出传感器之前使用声换能器,从而提高频率分辨率,以及使用电磁波导从位于焦线上的输出换能器传输能量。
    • 27. 发明公开
    • Lensless spectrum analyzer
    • Linsenloser Spektrumanalysator。
    • EP0071589A1
    • 1983-02-09
    • EP82850087.6
    • 1982-04-26
    • INSTITUTET FÖR OPTISK FORSKNING
    • Thylén, LarsStensland, LeifArvidsson, Gunnar
    • G01R23/17G02F1/03G02B6/00
    • G01R23/17G02B6/12004G02B6/124G02F1/2955
    • The present invention relates to a lensless spectrum analyser, preferably of integrated optical type, with a radiation source (1) connected to a waveguide (2) which is connected to an electro-optical deflector (3), exploiting Pockel's effect. The radiation from the deflector (3) is guided by the waveguide (2) on to a detection matrix (4). The electro-optical deflector (3) then consists of an electrode matrix (5) with the electrodes (6-11) arranged in or in the vicinity of an electro-optically active material (21). The electrodes (6-11) which are of different widths and are arranged at different distances from each other are arranged along a line (18) which is largely disposed at right angle to the incident radiation. By this means, the deflector acquires lens properties and can perform the desired Fourier transformation of the electric signal connected to the deflector (3). In the course of this transformation, the incident radiation is divided up into bundles of rays representing different Fourier components and focused along a focal line (20) along which the detection matrix (4) is arranged. Since the deflector possesses lens properties, it becomes possible to elaborate the entire device according to the invention in integrated form, enabling the device to be manufactured in its entirety by application of photolithographic technology.
    • 本发明涉及一种无透镜光谱分析仪,最好是集成光学类型,其中放射源(1)连接到利用普克尔效应连接到电光偏转器(3)的波导(2)上。 来自偏转器(3)的辐射由波导(2)引导到检测矩阵(4)上。 然后,电光偏转器(3)由布置在电光活性材料(21)中或附近的电极(6-11)的电极矩阵(5)组成。 具有不同宽度并且彼此不同距离布置的电极(6-11)沿着与入射辐射成直角大部分设置的线(18)布置。 通过这种方式,偏转器获得透镜特性并且可以执行与偏转器(3)连接的电信号的期望的傅里叶变换。 在该变换过程中,入射辐射被分成代表不同傅立叶分量的光束,并沿着布置检测矩阵(4)的焦线(20)聚焦。 由于偏转器具有透镜性质,因此可以以整体形式精细地制作本发明的整个装置,从而能够通过应用光刻技术整体地制造该装置。