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151 条记录 (耗时 0.026 秒)

    Optical modulation device
    33.
    发明授权
    Optical modulation device 失效
    光调制装置

    公开(公告)号：US4913506A

    公开(公告)日：1990-04-03

    申请号：US311218

    申请日：1989-02-16

    申请人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    发明人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    IPC分类号： G02F1/015 ,  G02F1/017 ,  G02F1/025 ,  G02B6/10

    CPC分类号： B82Y20/00 ,  G02F1/01708 ,  G02F1/025 ,  G02F2001/0157 ,  G02F2202/101 ,  G02F2202/102

    摘要： An optical modulation device is disclosed in which a difference between the photon energy of incident light and the band-gap energy of the modulation waveguide layer is set to a value greater than 50 meV to thereby suppress the degradation of the modulation voltage and the modulation band width which is caused by an increase in the intensity of incident light and in that the optical modulation device is formed in a predetermined length to thereby decrease the modulation voltage. The energy gap of the optical waveguide layer of the optical modulation device is varied continuously or discontinuously in the direction of its thickness to provide a constant absorption coefficient thickwise of the optical waveguide layer so that the electric field intensity distribution in the optical waveguide layer is compensated for, by which overlap of the light distribution and the absorption coefficient is increased so as to decrease the modulation voltage and broaden the modulation band by the reduction of the length of the device. The composition, thickness and stripe width of the optical waveguide layer are changed so that its absorption coefficient increases from the light receiving end face of the optical waveguide layer toward its light emitting end face, thereby making the number of carriers absorbed per unit length substantially constant in the direction of travel of light.

    摘要翻译： 公开了一种光调制装置，其中将入射光的光子能量与调制波导层的带隙能量之间的差设定为大于50meV的值，从而抑制调制电压和调制带的劣化 由入射光强度的增加引起的宽度，并且光调制装置形成为预定长度，从而降低调制电压。 光调制装置的光波导层的能隙在其厚度方向上连续或不连续地变化，以提供光波导层厚度的恒定吸收系数，使得光波导层中的电场强度分布得到补偿 由此，增加了光分布和吸收系数的重叠，从而降低了调制电压，并且通过减小器件的长度来扩大调制频带。 改变光波导层的组成，厚度和条纹宽度，使得其吸收系数从光波导层的光接收端面向其发光端面增加，从而使每单位长度吸收的载流子基本恒定 在光的行进方向。

    Optical switch with reduced polarization dependency and no waveform deformation and frequency shift
    34.
    发明授权
    Optical switch with reduced polarization dependency and no waveform deformation and frequency shift 失效
    光开关具有降低的偏振依赖性，无波形变形和频移

    公开(公告)号：US5883734A

    公开(公告)日：1999-03-16

    申请号：US827638

    申请日：1997-04-10

    申请人： Masatoshi Suzuki ,  Shigeyuki Akiba

    发明人： Masatoshi Suzuki ,  Shigeyuki Akiba

    IPC分类号： G02F1/33 ,  G02F1/29

    CPC分类号： G02F1/33 ,  Y10S372/703

    摘要： An optical switch is formed by: at least one switch driving circuit for generating ultrasonic waves; at least one electric acousto-optic element forming at least one diffraction grating therein upon being applied with the ultrasonic waves generated by the switch driving circuit; at least one polarization rotator for rotating a polarization plane of a first primary diffracted light produced by the diffraction grating, by 90.degree.; and a light path through which an input light is entered into the electric acousto-optic element at a Bragg angle of the diffraction grating in a first direction side, the first direction being defined as either identical or opposite to a propagation direction of the ultrasonic waves, so that the first primary diffracted light is produced by the diffraction grating from the input light, a polarization plane rotated light produced by the polarization rotator is entered into the electric acousto-optic element at a Bragg angle of the diffraction grating in a second direction side, the second direction being opposite to the first direction, and a second primary diffracted light produced by the diffraction grating from the polarization plane rotated light is outputted as an output light.

    摘要翻译： 光开关由以下部分形成：用于产生超声波的至少一个开关驱动电路; 在施加由开关驱动电路产生的超声波时，至少一个形成至少一个衍射光栅的电声元件; 至少一个偏振旋转器，用于将由衍射光栅产生的第一主衍射光的偏振面旋转90度; 以及光路，通过所述光路将输入光以第一方向侧的衍射光栅的布拉格角输入到所述电声元件中，所述第一方向被定义为与所述超声波的传播方向相同或相反 ，使得第一主衍射光由衍射光栅从输入光产生，由偏振旋转器产生的偏振面旋转光以第二方向的衍射光栅的布拉格角进入电声元件 侧，第二方向与第一方向相反，并且输出由衍射光栅从偏振面旋转的光产生的第二主衍射光作为输出光。

    Pn junction optical modulating device having a buffer layer with small energy gap
    35.
    发明授权
    Pn junction optical modulating device having a buffer layer with small energy gap 失效
    具有具有小能隙的缓冲层的Pn结光调制装置

    公开(公告)号：US4991921A

    公开(公告)日：1991-02-12

    申请号：US442521

    申请日：1989-11-27

    申请人： Masatoshi Suzuki ,  Hideaki Tanaka ,  Shigeyuki Akiba ,  Yuichi Matsushima

    发明人： Masatoshi Suzuki ,  Hideaki Tanaka ,  Shigeyuki Akiba ,  Yuichi Matsushima

    IPC分类号： G02F1/015 ,  G02F1/025

    CPC分类号： G02F1/025 ,  G02F2001/0157

    摘要： An optical modulating device is disclosed which has, on a substrate directly or via a lower cladding layer, an optical waveguide layer, an upper cladding layer of a refractive index smaller than that of the optical waveguide layer and a pair of electrodes for applying an electric field across the substrate and the upper cladding layer and in which the absorption coefficient for incident light of a fixed intensity incident to the optical waveguide layer is varied by the electric field applied across the pair of electrodes to perform the modulation of the light and the modulated light is emitted from a light emitting end face of the optical waveguide layer. In accordance with the present invention, a pn junction is formed in the upper cladding layer and at least one buffer layer of an energy gap smaller than that of the upper cladding layer but larger than that of the optical waveguide layer is interposed between the upper cladding layer and the optical waveguide layer.

    摘要翻译： 公开了一种光学调制装置，其在衬底上直接或经由下包层，光波导层，折射率小于光波导层的折射率的上包层和用于施加电的一对电极 并且其中入射到光波导层的固定强度的入射光的吸收系数由施加在该对电极上的电场而变化，以执行光的调制和被调制的 光从光波导层的发光端面发射。 根据本发明，在上部包层中形成pn结，并且至少一个能量间隙的缓冲层比上部包覆层的能隙小，但是比光波导层大的缓冲层插入在上部包层 层和光波导层。

    Optical modulation element
    36.
    发明授权
    Optical modulation element 失效
    光调制元件

    公开(公告)号：US4946243A

    公开(公告)日：1990-08-07

    申请号：US387511

    申请日：1989-07-28

    申请人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    发明人： Masatoshi Suzuki ,  Shigeyuki Akiba ,  Hideaki Tanaka ,  Katsuyuki Utaka

    IPC分类号： G02B6/12 ,  G02F1/015 ,  G02F1/025 ,  H01L31/14 ,  H03C1/34

    CPC分类号： G02F1/025 ,  G02F2001/0157

    摘要： An optical modulation element is disclosed which has, on a substrate directly or through a lower clad layer, an optical waveguide layer of a low impurity concentration, an upper clad layer of a refractive index smaller than that of the optical waveguide layer, and electrodes, and in which light of a constant intensity incident on a light incident end face of the optical waveguide layer is intensity-modulated by changing the absorption coefficient of the optical waveguide layer by means of an electric field applied thereto across the electrodes so that the thus modulated light is emitted from a light emitting end face of the optical waveguide layer. In accordance with the present invention, a plurality of low impurity concentration regions and a plurality of high impurity concentration regions are disposed alternately with each other in contact with at least one of the lower and upper clad layers in the direction of travel of light in such a manner that the distribution density of the plurality of high impurity concentration regions increases in the direction of travel of light.

    Semiconductor device with distributed bragg reflector
    38.
    发明授权
    Semiconductor device with distributed bragg reflector 失效
    分布式布拉格反射器的半导体器件

    公开(公告)号：US4796274A

    公开(公告)日：1989-01-03

    申请号：US13665

    申请日：1987-02-12

    申请人： Shigeyuki Akiba ,  Masashi Usami ,  Yukio Noda ,  Masatoshi Suzuki

    发明人： Shigeyuki Akiba ,  Masashi Usami ,  Yukio Noda ,  Masatoshi Suzuki

    IPC分类号： H01S5/00 ,  H01S5/12 ,  H01S5/125 ,  H01S3/19

    CPC分类号： H01S5/1228 ,  H01S5/12 ,  H01S5/125

    摘要： A semiconductor device with a distributed Bragg reflector is disclosed, in which periodic corrugations are formed between two semiconductor layers along the direction of travel of light. In accordance with the present invention, the periodic corrugations are formed by grid-like layers of a refractory material. The refractory material is an insulator, a refractory metal or a laminate member of an insulator and a refractory metal.

    摘要翻译： 公开了一种具有分布式布拉格反射器的半导体器件，其中沿着光的行进方向在两个半导体层之间形成周期性波纹。 根据本发明，周期性波纹由耐火材料的格子状的层形成。 耐火材料是绝缘体，难熔金属或绝缘体和难熔金属的层叠构件。

    Optical digital regenerator
    39.
    发明授权
    Optical digital regenerator 失效
    光学数字再生器

    公开(公告)号：US06532091B1

    公开(公告)日：2003-03-11

    申请号：US09246256

    申请日：1999-02-08

    申请人： Tetsuya Miyazaki ,  Tomohiro Otani ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto

    发明人： Tetsuya Miyazaki ,  Tomohiro Otani ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto

    IPC分类号： H04B1002

    CPC分类号： H04B10/299

    摘要： An optical digital regenerator for digitally regenerating an input signal in an intact optical state. A first operating unit has a first probe light generator for generating a first probe light and a first optical operator for converting a waveform of the first probe light output from a first probe light generator according to an optical intensity waveform of the input signal light. A clock extractor extracts a clock component of the input signal light from a photocurrent generated by the first optical operator. A second optical operating unit has a second probe light generator for generating a second probe light pulsed in accordance with the clock output from the clock extractor and a second optical operator for sampling the second probe pulse light output from the second probe light generator.

    摘要翻译： 一种用于以完整光学状态数字再生输入信号的光学数字再生器。 第一操作单元具有用于产生第一探测光的第一探测光发生器和用于根据输入信号光的光强度波形转换从第一探测光发生器输出的第一探测光的波形的第一光学操作器。 时钟提取器从由第一光学运算器产生的光电流提取输入信号光的时钟分量。 第二光学操作单元具有第二探测光发生器，用于产生根据来自时钟提取器的时钟输出脉冲的第二探测光，以及第二光学操作器，用于对从第二探测光发生器输出的第二探测脉冲光进行采样。

    Wavelength converter, optically operational device and optical pulse phase detecting circuit
    40.
    发明授权
    Wavelength converter, optically operational device and optical pulse phase detecting circuit 失效
    波长转换器，光学运算器件和光脉冲相位检测电路

    公开(公告)号：US5959764A

    公开(公告)日：1999-09-28

    申请号：US923349

    申请日：1997-09-04

    申请人： Noboru Edagawa ,  Masatoshi Suzuki ,  Shu Yamamoto

    发明人： Noboru Edagawa ,  Masatoshi Suzuki ,  Shu Yamamoto

    IPC分类号： G02F2/02 ,  G02F1/015 ,  G02F2/00 ,  G02F3/00 ,  H04B10/2507 ,  H04B10/29 ,  H04B10/516 ,  H04B10/54 ,  H04B10/572 ,  H04B10/58 ,  H04B10/61 ,  H04J14/08 ,  G02F1/39

    CPC分类号： G02F2/004 ,  G02F2001/0157 ,  H01S5/509 ,  H04J14/08

    摘要： A waveform converter includes a transmission-type InGaAsP electroabsorption optical modulator 10 using the Franz-Keldysh effect. Continuous light (probe light) 12 as a target of wavelength conversion is fed to an end surface 10a of the optical modulator 10 while a constant voltage of 3 V is applied to the optical modulator 10. An optical circulator 14 is supplied with original signal light (signal light to be waveform-converted) 16 through its terminal A, and delivers it from the terminal B thereof to another end surface 10b of the optical modulator 10. The optical modulator 10 gives a loss to the probe light 12 according to the intensity of the original signal light 16 and makes the waveform of the probe light 12 to be substantially the same as the original signal light. The probe light waveform-converted by the optical modulator 10 and output from the end surface 10b is fed to a terminal B of an optical circulator 14 as a waveform-converted light 18 and output from its terminal C.

    摘要翻译： 波形转换器包括使用Franz-Keldysh效应的透射型InGaAsP电吸收光调制器10。 将作为波长转换的目标的连续光（探测光）12馈送到光调制器10的端面10a，同时将3V的恒定电压施加到光调制器10。光环行器14被提供有原始信号光 （要被波形转换的信号光）16，并将其从端子B传送到光调制器10的另一端面10b。光调制器10根据强度给探测光12带来损耗 的原始信号光16，使探测光12的波形基本上与原始信号光相同。 由光调制器10波形转换并从端面10b输出的探测光被作为波形转换光18馈送到光环行器14的端子B，并从其端子C输出。