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    • 32. 发明授权
    • Optical wavelength switch having planar lightwave circuit structure
    • 具有平面光波电路结构的光波长开关
    • US07349593B2
    • 2008-03-25
    • US11485738
    • 2006-07-13
    • Hidehiko NakataSatoshi IdeKoji Terada
    • Hidehiko NakataSatoshi IdeKoji Terada
    • G02B6/26G02B6/42H01L21/00
    • G02B6/357G02B6/3514G02B6/352G02B6/356G02B6/3566G02B6/3596
    • An optical wavelength switch having a planar wave-guide formed on a substrate including a wave-guide-type diffraction grating having an input/output wave-guide with an under-clad layer on a sacrificial layer formed on the substrate, a core layer formed on the under-clad layer and an over-clad layer formed on the core layer. The switch including a first slab wave-guide connected with the input/output wave-guide, an array wave-guide with one side connected to the first slab wave guide, a second slab wave-guide connected to the other side of the array wave-guide, and a movable girder secured to the substrate. The movable girder has the same under-clad layer, core layer and over-clad layer as the wave-guide-type diffraction grating. The switch has a minor at the tip of the movable girder, the mirror facing an end face of the second slab wave-guide, and the displaceable along a direction perpendicular to the optical axis.
    • 一种光学波长开关,具有形成在基板上的平面波导,该平面波导包括在基板上形成的牺牲层上具有带有下包层的输入/输出波导的波导型衍射光栅,形成的芯层 在下覆盖层和形成在芯层上的覆盖层上。 所述开关包括与所述输入/输出波导相连的第一平板波导,与所述第一平板波导相连的一侧的阵列波导,连接到所述阵列波的另一侧的第二平板波导 以及固定到基板的可动梁。 可移动梁具有与波导型衍射光栅相同的下包层,芯层和外包层。 该开关在可移动梁的尖端处具有小型,镜面朝向第二板状波导的端面,并且沿着与光轴垂直的方向可移动。
    • 34. 发明授权
    • Light emitting element driving apparatus
    • 发光元件驱动装置
    • US06292284B1
    • 2001-09-18
    • US09174309
    • 1998-10-19
    • Toshiyuki TakaujiToru MatsuyamaTadao InoueTadashi IkeuchiSatoshi Ide
    • Toshiyuki TakaujiToru MatsuyamaTadao InoueTadashi IkeuchiSatoshi Ide
    • H04B1004
    • H04B10/504H04B10/07H04B10/564
    • The present invention provides a light emitting element driving apparatus having a driving unit for driving a light emitting element by means of a driving signal while performing automatic light power control, which enables a light output to rise at a high speed in the head portion of a burst signal to be first inputted and light outputs of a second burst signal after the first burst signal and signals thereafter to be stably supplied irrespective of holding time. To this end, the light emitting element driving apparatus comprises a reference voltage generation unit for generating a reference voltage from an input electric signal containing data information, the reference voltage being used for obtaining a light output having specified power from the light emitting element in a normal condition, a monitoring voltage generation unit for generating a monitoring voltage signal corresponding to power of an optical signal outputted from the light emitting element, a light power control unit for controlling, based on a result of comparison from the reference voltage and the monitoring voltage signal, the driving unit by a discrete control amount such that a light output from the light emitting element can have the specified power and an initial value setting unit for setting a raising component as an initial value in a control signal having the discrete control amount.
    • 本发明提供了一种发光元件驱动装置,其具有驱动单元,用于通过驱动信号驱动发光元件,同时进行自动光功率控制,这使得光输出能够高速地在 突发信号首先被输入,并且在第一个突发信号之后的第二个突发信号的光输出,此后信号被稳定地供给,而不管保持时间如何。 为此,发光元件驱动装置包括:参考电压产生单元,用于从包含数据信息的输入电信号产生参考电压,该参考电压用于获得具有来自发光元件的特定功率的光输出 监视电压产生单元,用于产生对应于从发光元件输出的光信号的功率的监视电压信号;光功率控制单元,用于根据参考电压和监视电压的比较结果进行控制; 信号,驱动单元通过离散控制量使得从发光元件输出的光能够具有指定的功率,以及初始值设置单元,用于将具有离散控制量的控制信号中的提升分量设置为初始值。
    • 35. 发明授权
    • Signal amplifier circuit
    • 信号放大电路
    • US5955921A
    • 1999-09-21
    • US910002
    • 1997-08-11
    • Satoshi IdeHiroyuki NobuharaTakaya Chiba
    • Satoshi IdeHiroyuki NobuharaTakaya Chiba
    • H03G3/30H03F3/45
    • H03G3/3084
    • The present invention discloses a signal amplifier circuit used in, for example, a receive portion in an optical communication system, and including an automatic threshold value setting portion to automatically set a threshold value depending upon a "1" side level and a "0" side level of an input signal, an automatic gain control amplifying portion to take as inputs the input signal and the threshold value from the automatic threshold value setting portion so as to perform differential amplification, and a gain control portion to detect amplitude information of the input signal so as to feed a gain control signal according to amplitude of the input signal to the automatic gain control amplifying portion as a feedforward signal. It is thereby possible to avoid limitation of a signal amplified in the signal amplifier circuit at a time of reproduction of a pulse signal, and compensate for offsets present in circuits so as to suppress a variation in pulse width of the output signal.
    • 本发明公开了一种信号放大器电路,例如在光通信系统中使用的接收部分,并且包括根据“1”侧电平和“0”自动设定阈值的自动阈值设定部, 输入信号的侧面电平,自动增益控制放大部分,从自动阈值设定部分输入输入信号和阈值以进行差分放大;以及增益控制部分,用于检测输入信号的幅度信息 信号,以便根据输入信号的幅度将增益控制信号馈送到自动增益控制放大部分作为前馈信号。 因此,可以避免在再现脉冲信号时在信号放大器电路中放大的信号的限制,并补偿存在于电路中的偏移,以便抑制输出信号的脉冲宽度的变化。