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    • 64. 发明授权
    • Optical receiving circuit
    • 光接收电路
    • US08184994B2
    • 2012-05-22
    • US12637082
    • 2009-12-14
    • Koji Terada
    • Koji Terada
    • H04B10/06
    • H04B10/691H04J14/02
    • An optical receiving circuit receives and demodulates an optical signal subjected to phase modulation and wavelength division multiplexing. The optical receiving circuit includes an interfering unit that causes a reference signal to interfere with the optical signal to output resulting signals as positive-phase signals and negative-phase signals; and a wavelength separator having input ports receiving the positive-phase signals and the negative-phase signals, the positive-phase and negative-phase signals being adjacent to each other. The wavelength separator separates according to wavelength, the positive-phase signals and the negative-phase signals, and from output ports, outputs for each wavelength, a separated positive-phase signal and negative-phase signal in a state of being adjacent to each other. The optical receiving circuit further includes balanced receivers respectively provided for each wavelength, where a given balanced receiver for a given wavelength performs balanced reception and demodulation of the separated positive-phase signal and negative phase signal of the given wavelength.
    • 光接收电路接收并解调经过相位调制和波分复用的光信号。 光接收电路包括:干扰单元,其引起参考信号干扰光信号,以将所得信号作为正相信号和负相位信号输出; 以及波长分离器,其具有接收正相信号和负相位信号的输入端口,正相和负相位信号彼此相邻。 波长分离器根据波长,正相信号和负相位信号,以及从输出端口,每个波长的输出,分离的正相信号和彼此相邻的状态的负相位信号分离 。 光接收电路还包括分别为每个波长提供的平衡接收器,其中给定波长的给定平衡接收机对所分离的正相信号和给定波长的负相位信号进行平衡的接收和解调。
    • 65. 发明申请
    • Detector module
    • 检测器模块
    • US20100158542A1
    • 2010-06-24
    • US12654419
    • 2009-12-18
    • Andreas Gerhard SteffanGeorgios Tsianos
    • Andreas Gerhard SteffanGeorgios Tsianos
    • H04B10/06
    • H04B10/691G02B6/4201G02B6/4206G02B6/4214H04B10/676
    • A detector module for the reception of optical signals (SE) including a module housing having at least one electrical and at least one optical bushing, at least one electrical assembly connected to the electrical bushing, and at least one optical assembly connected to the optical bushing, the electrical and optical assemblies being arranged within the module housing, the optical and electrical assemblies being connected to one another via at least one optical interface, and the electrical assembly having at least one photodiode for converting the optical output signals of the optical assembly into electrical signals. The optical assembly has at least one collimator and on the output side transmits at least one beam comprising collimated electromagnetic rays running parallel to one another via a free-radiating connection as optical interface to the electrical assembly, and the electrical assembly receives the beam from the optical assembly via the free-radiating connection.
    • 一种用于接收光学信号(SE)的检测器模块,包括具有至少一个电气和至少一个光学衬套的模块外壳,连接到电气套管的至少一个电气组件,以及连接到光学衬套的至少一个光学组件 电气和光学组件布置在模块壳体内,光学和电气组件经由至少一个光学接口彼此连接,并且电气组件具有至少一个光电二极管,用于将光学组件的光学输出信号转换成 电信号。 光学组件具有至少一个准直器,并且在输出侧上透过至少一个光束,该光束包括通过作为光学接口的电气组件的自由辐射连接而彼此平行延伸的准直电磁射线,并且电气组件接收来自 光学组件通过自由辐射连接。
    • 66. 发明申请
    • Optical receiver
    • 光接收机
    • US20050082524A1
    • 2005-04-21
    • US10940529
    • 2004-09-14
    • Yoshiki KuharaMitsuaki NishieShigeo Hayashi
    • Yoshiki KuharaMitsuaki NishieShigeo Hayashi
    • H01L29/08
    • H04B10/691
    • An optical receiver includes a light-receiving part and a control part. The light-receiving part includes an APD, a PIN-PD, and a branching optical device. First signal light is incident on the light-receiving part and is divided into second signal light and third signal light which are incident on the APD and the PIN-PD, respectively, by the branching optical device. Due to this structure, the third signal light is incident on the PIN-PD without the quantity thereof being varied depending on the polarization state of the first signal light. The control part generates a supply voltage at which a desired avalanche multiplication factor is obtained in the APD on the basis of the output current from the PIN-PD. According to the above-described structure, the avalanche multiplication factor of the APD is accurately controlled on the basis of the output current of the PIN-PD.
    • 光接收器包括光接收部分和控制部分。 光接收部分包括APD,PIN-PD和分支光学装置。 第一信号光入射在光接收部分上,分别由分支光学装置分别入射到APD和PIN-PD上的第二信号光和第三信号光。 由于这种结构,第三信号光入射在PIN-PD上,其数量根据第一信号光的偏振状态而变化。 控制部分基于来自PIN-PD的输出电流产生在APD中获得期望的雪崩倍增因子的电源电压。 根据上述结构,基于PIN-PD的输出电流来精确地控制APD的雪崩倍增系数。
    • 67. 发明授权
    • Transimpedance amplifier for optical receivers
    • 用于光接收器的互阻放大器
    • US4498001A
    • 1985-02-05
    • US401521
    • 1982-07-26
    • Lanny S. Smoot
    • Lanny S. Smoot
    • H03F3/34H03F3/08H03G3/20H04B10/158H01J40/14
    • H03G3/3084H03F3/087H04B10/691
    • An improved transimpedance amplifier allows an optical transmitter and receiver to be in close proximity to each other without fear of overloading the receiver. The improvement increases the dynamic range of the transimpedance amplifier and thereby the operating range of the receiver. A peak detector (22) at the output of an inverting amplifier (11) within the transimpedance amplifier turns on a field effect transistor (FET) circuit (23) when an AC component of an electrical signal becomes so large that the inverting amplifier would otherwise go into saturation. The FET circuit (23) acts as an AC shunt impedance at the input of the inverting amplifier and diverts the excess AC current to ground (30). Also, the FET circuit (23) acts as a DC resistance in concert with sense and sink current mirrors (21) and (24) to effectively divert an excessive DC component of the electrical signal away from the input of the inverting amplifier (11). Although the dynamic range of the transimpedance amplifier is increased, the optical sensitivity and the performance of the receiver remain unchanged.
    • 改进的跨阻抗放大器允许光发射机和接收机彼此靠近,而不用担心接收机过载。 该改进增加了跨阻抗放大器的动态范围,从而增加了接收器的工作范围。 当跨信号放大器中的反相放大器(11)的输出处的峰值检测器(22)在电信号的AC分量变得如此大以致反相放大器否则将导通场效应晶体管(FET)电路(23)时, 进入饱和。 FET电路(23)在反相放大器的输入处作为AC并联阻抗,并将多余的AC电流转移到地(30)。 此外,FET电路(23)与感测和吸收电流镜(21)和(24)一起用作直流电阻,以有效地将电信号的过大直流分量远离反相放大器(11)的输入, 。 虽然跨阻放大器的动态范围增加,但是接收机的光学灵敏度和性能保持不变。