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21. 发明授权

US07912380B2 Optical receiver 有权
标题翻译：光接收机
公开(公告)号：US07912380B2
公开(公告)日：2011-03-22
申请号：US11416389
申请日：2006-05-03
申请人： Katsumi Uesaka , Keiji Tanaka
发明人： Katsumi Uesaka , Keiji Tanaka
IPC分类号： H04B10/06
CPC分类号： H04B10/66 , H04B10/0799
摘要： The present invention provides an optical receiver able to monitor the level of the optical input signal in accurate even when the level is quite small. The optical receiver comprises a photodiode to generate a photocurrent Ipd, a current mirror circuit to reflect the photocurrent into a mirrored current Imon, a current-to-voltage converter to convert the mirrored current Imon to a voltage signal, switch to connect/cut the current mirror circuit with the current-to-voltage converter, and a correction unit for subtracting a signal when the switch is connected from a signal when the switch is cut.
摘要翻译：本发明提供一种即使当该电平相当小时也能够准确地监视光输入信号的电平的光接收器。光接收器包括光电二极管以产生光电流Ipd，将光电流反射成镜像电流Imon的电流镜电路，用于将镜像电流Imon转换成电压信号的电流 - 电压转换器，切换到连接/切割具有电流 - 电压转换器的电流镜电路，以及用于当开关切断时从信号连接开关时减去信号的校正单元。

22. 发明授权

US07492797B2 Laser driver circuit 失效
标题翻译：激光驱动电路
公开(公告)号：US07492797B2
公开(公告)日：2009-02-17
申请号：US11113324
申请日：2005-04-25
申请人： Katsumi Uesaka
发明人： Katsumi Uesaka
IPC分类号： H01S3/00
CPC分类号： H01S5/0683 , H01S5/0427 , H01S5/06213
摘要： A laser driver circuit driving a laser diode to generate an optical output corresponding to an input data, and controlling the optical output based on an output current from a photodiode that detects the optical output. The output current is converted into a voltage signal, whose amplitude is detected after filtering the voltage signal by a low-pass filter. A reference signal corresponding to the input data is generated, and its amplitude is detected. A modulator for generating a modulation current regulates the amplitude of the modulation current according to the difference between the two detected amplitudes.
摘要翻译：激光驱动电路驱动激光二极管以产生对应于输入数据的光输出，并且基于来自检测光输出的光电二极管的输出电流来控制光输出。输出电流被转换为电压信号，其电压信号通过低通滤波器对电压信号进行滤波后检测。产生对应于输入数据的参考信号，并检测其幅度。用于产生调制电流的调制器根据两个检测到的幅度之间的差来调节调制电流的幅度。

23. 发明申请

US20070230526A1 Semiconductor laser module driven in shunt-driving configuration 审中-公开
标题翻译：半导体激光模块驱动分流驱动配置
公开(公告)号：US20070230526A1
公开(公告)日：2007-10-04
申请号：US11727414
申请日：2007-03-26
申请人： Akihiro Moto , Katsumi Uesaka
发明人： Akihiro Moto , Katsumi Uesaka
IPC分类号： H01S3/00
CPC分类号： H01S5/02212 , H01L2224/48091 , H01L2224/48137 , H01L2924/1305 , H01S5/02248 , H01S5/0427 , H01S5/06226 , H01L2924/00014 , H01L2924/00
摘要： The present invention is to provide a laser module stably operable with less jitter in high frequencies. The laser module of the invention provides a semiconductor laser diode and a current-shunting device that shunts the current flowing in the LD by responding the input modulation signal. A path where the current flows puts a serial circuit comprised of an inductor and a compensation circuit to compensate a ripple in the frequency response of the module. The resonance frequency of the compensation circuit corresponds to a frequency of a dip or a peak in the frequency spectrum of the module.
摘要翻译：本发明是提供一种在高频下具有较少抖动的稳定可操作的激光模块。本发明的激光模块提供半导体激光二极管和电流分流装置，其通过响应输入调制信号来分流在LD中流动的电流。电流流动的路径使得由电感器和补偿电路组成的串联电路来补偿模块的频率响应中的纹波。补偿电路的谐振频率对应于模块的频谱中的倾角或峰值的频率。

24. 发明申请

US20060197008A1 Light-receiving device having an optical fuse 审中-公开
标题翻译：具有光学保险丝的光接收装置
公开(公告)号：US20060197008A1
公开(公告)日：2006-09-07
申请号：US11354542
申请日：2006-02-14
申请人： Takatoshi Kato , Katsumi Uesaka
发明人： Takatoshi Kato , Katsumi Uesaka
IPC分类号： H01J40/14 , H01L31/00 , H03K17/78
CPC分类号： G02B6/30 , G02B6/264 , G02B2006/4297 , G02F1/3523 , H01L31/02161 , H01L31/107
摘要： The present invention provides a light-receiving device that may escape the device from the breakdown thereof and may suppress an optical loss. The light-receiving device of the invention includes a surface to sense the light and a thin film made of PbSe nano-particles, diameters of which are smaller than 20 nm. This thin film operates as an optical fuse, so the device may be escaped from the breakdown thereof. Moreover, the thin film is disposed directly onto the light-sensing surface of the device, the optical loss cause between the thin film and the sensing surface may be suppressed.
摘要翻译：本发明提供一种光接收装置，其可以使装置从其击穿中脱离，并且可以抑制光损失。本发明的光接收装置包括用于感测光的表面和由PbSe纳米颗粒制成的薄膜，其直径小于20nm。该薄膜作为光学保险丝操作，因此该装置可以从其击穿中逃逸。此外，薄膜直接设置在器件的感光表面上，可以抑制薄膜和感测表面之间的光学损耗。

25. 发明授权

US08218976B2 Optical receiver with trans-impedance responding in bit-by-bit to input signal 有权
标题翻译：具有跨阻抗的光接收器，以逐位为单位输入信号
公开(公告)号：US08218976B2
公开(公告)日：2012-07-10
申请号：US12651632
申请日：2010-01-04
申请人： Katsumi Uesaka
发明人： Katsumi Uesaka
IPC分类号： H04B10/06
CPC分类号： H04B10/693 , H03F1/083 , H03F3/08
摘要： An optical receiver implemented with a pre-amplifier with an additional trans-impedance able to respond to the input signal in bit-by-bit is disclosed. The optical receiver provides a photodiode to convert an optical signal into a photocurrent, a trans-impedance amplifier to convert the photocurrent to a voltage signal, and an additional trans-impedance circuit able to respond instantaneously to the voltage signal. The additional trans-impedance includes a FET whose gate is fully fixedly biased and the source thereof receives the voltage signal. The FET may bypass the current flowing in the intrinsic trans-impedance instantaneously.
摘要翻译：公开了一种使用具有能够逐比特地响应输入信号的额外的跨阻器的前置放大器实现的光学接收器。光接收器提供光电二极管以将光信号转换成光电流，将反射阻抗放大器转换成电压信号的电阻，以及能够瞬时响应于电压信号的额外的跨阻抗电路。额外的跨阻抗包括一个FET，其门完全固定偏置，其源极接收电压信号。 FET可以瞬时旁路在本征反阻抗中流动的电流。

26. 发明申请

US20120134620A1 OPTICAL MODULATOR 有权
标题翻译：光学调制器
公开(公告)号：US20120134620A1
公开(公告)日：2012-05-31
申请号：US13307886
申请日：2011-11-30
申请人： Kazuhiro Yamaji , Katsumi Uesaka
发明人： Kazuhiro Yamaji , Katsumi Uesaka
IPC分类号： G02F1/035
CPC分类号： G02F1/0134 , G02F1/0121 , G02F1/0123 , G02F1/2255 , G02F1/2257 , H04B10/5057
摘要： A Mach-Zehnder optical modulator includes a join-and-branch portion, two light wave guides connected with the join-and-branch portion, two output light waveguides connected with the join-and-branch portion, arm electrodes respectively provided on the two light waveguides, light intensity detection electrodes respectively provided on the two output light waveguides, and a leakage suppression electrode provided between the arm electrodes and the light intensity detection electrodes.
摘要翻译：马赫曾德尔光调制器包括连接和分支部分，与接合分支部分连接的两个光波导，与连接和分支部分连接的两个输出光波导，分别设置在两个分支部分上的臂电极分别设置在两个输出光波导上的光波导，光强检测电极以及设置在臂电极和光强检测电极之间的泄漏抑制电极。

27. 发明申请

US20100209100A1 OPTICAL RECEIVER 审中-公开
标题翻译：光接收机
公开(公告)号：US20100209100A1
公开(公告)日：2010-08-19
申请号：US12772585
申请日：2010-05-03
申请人： Katsumi Uesaka , Keiji Tanaka
发明人： Katsumi Uesaka , Keiji Tanaka
IPC分类号： H04B10/08 , H04B10/06
CPC分类号： H04B10/66 , H04B10/0799
摘要： The present invention provides an optical receiver able to monitor the level of the optical input signal in accurate even when the level is quite small. The optical receiver comprises a photodiode to generate a photocurrent Ipd, a current mirror circuit to reflect the photocurrent into a mirrored current Imon, a current-to-voltage converter to convert the mirrored current Imon to a voltage signal, switch to connect/cut the current mirror circuit with the current-to-voltage converter, and a correction unit for subtracting a signal when the switch is connected from a signal when the switch is cut.
摘要翻译：本发明提供一种即使当该电平相当小时也能够准确地监视光输入信号的电平的光接收器。光接收器包括光电二极管以产生光电流Ipd，将光电流反射成镜像电流Imon的电流镜电路，用于将镜像电流Imon转换成电压信号的电流 - 电压转换器，切换到连接/切割具有电流 - 电压转换器的电流镜电路，以及用于当开关切断时从信号连接开关时减去信号的校正单元。

28. 发明申请

US20050238072A1 Laser driver circuit 失效
标题翻译：激光驱动电路
公开(公告)号：US20050238072A1
公开(公告)日：2005-10-27
申请号：US11113324
申请日：2005-04-25
申请人： Katsumi Uesaka
发明人： Katsumi Uesaka
IPC分类号： H01S5/0683 , H01S3/00 , H01S5/042 , H01S5/062
CPC分类号： H01S5/0683 , H01S5/0427 , H01S5/06213
摘要： A laser driver circuit driving a laser diode to generate an optical output corresponding to an input data, and controlling the optical output based on an output current from a photodiode that detects the optical output. The output current is converted into a voltage signal, whose amplitude is detected after filtering the voltage signal by a low-pass filter. A reference signal corresponding to the input data is generated, and its amplitude is detected. A modulator for generating a modulation current regulates the amplitude of the modulation current according to the difference between the two detected amplitudes.
摘要翻译：激光驱动电路驱动激光二极管以产生对应于输入数据的光输出，并且基于来自检测光输出的光电二极管的输出电流来控制光输出。输出电流被转换为电压信号，其电压信号通过低通滤波器对电压信号进行滤波后检测。产生对应于输入数据的参考信号，并检测其幅度。用于产生调制电流的调制器根据两个检测到的幅度之间的差来调节调制电流的幅度。

29. 发明授权

US5600472A Distortion generating circuit 失效
标题翻译：失真发生电路
公开(公告)号：US5600472A
公开(公告)日：1997-02-04
申请号：US226852
申请日：1994-04-13
申请人： Katsumi Uesaka
发明人： Katsumi Uesaka
IPC分类号： H03F1/32 , H04B10/58 , H04B10/00
CPC分类号： H03F1/3276 , H04B10/58
摘要： A distortion generating circuit of the present invention comprises a linear attenuator which has an input impedance substantially coincident with an impedance of a transmission path of input signal and an output impedance substantially coincident with an impedance of a transmission path of output signal; and at least one diode which is connected in an alternating current manner in parallel with the linear attenuator with respect to the input signal into the linear attenuator and which generates nonlinear distortion for a component in the input signal input thereinto; which outputs an AC sum of an output from the linear attenuator and an output from the diode. By this arrangement, desired distortion can be well given in a simple circuit arrangement while suppressing generation of unnecessary intermodulation distortion. An optical transmitter, an optical receiver or an amplifier can be constructed using the distortion generating circuit of the present invention, obtaining a signal with reduced distortion.
摘要翻译：本发明的失真发生电路包括线性衰减器，其具有与输入信号的传输路径的阻抗基本一致的输入阻抗和基本上与输出信号的传输路径的阻抗一致的输出阻抗; 以及至少一个二极管，其相对于线性衰减器的输入信号以交流方式与线性衰减器并联连接，并且对输入的输入信号中的分量产生非线性失真; 其输出来自线性衰减器的输出和二极管的输出的AC和。通过这种布置，可以在简单的电路布置中很好地给出期望的失真，同时抑制不必要的互调失真的产生。可以使用本发明的失真发生电路来构造光发送器，光接收器或放大器，从而获得具有减小的失真的信号。

30. 发明授权

US5224112A Semiconductor laser device driving circuit 失效
标题翻译：半导体激光器件驱动电路
公开(公告)号：US5224112A
公开(公告)日：1993-06-29
申请号：US826454
申请日：1992-01-27
申请人： Katsumi Uesaka
发明人： Katsumi Uesaka
IPC分类号： H01S5/0683
CPC分类号： H01S5/06832
摘要： A semiconductor laser device driving circuit including a semiconductor laser device, a detection unit for detecting a luminous output of the semiconductor laser device, a reference current unit for providing reference currents for reference maximum and minimum values of the luminous output of the semiconductor laser device, and a driving unit for supplying currents to the semiconductor laser device so as to make maximum and minimum values of the luminous output of the semiconductor laser device detected by the detection unit coincident with the reference maximum and minimum values determined by the reference currents. In the semiconductor laser device driving circuit, the reference currents are given as differences between a plurality of currents supplied from current sources.

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