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公开(公告)号：US06658217B2
公开(公告)日：2003-12-02
申请号：US09946450
申请日：2001-09-06
IPC分类号： H04B1006
CPC分类号： H04B10/6932 , H04B10/6933 , H04B10/695
摘要： An optical receiver generates a voltage signal having a predetermined swing from a current signal, and feeds the voltage signal to a decision circuit. An optical receiving element receives the input optical signal, converts the optical signal to a current signal, and provides the current signal to a preamplifier, which converts the input current signal into a voltage signal. The voltage signal is input to an amplifier having a limiting function, which linearly amplifies the voltage signal when the swing of the voltage signal is smaller than a predetermined value, and limitedly amplifies the voltage signal when the voltage signal is greater than the predetermined value. An automatic-gain-control amplifier receives the output from the amplifier with the limiting function, and amplifies the input voltage signal to a voltage signal having a constant swing. The decision circuit receives the output of the automatic-gain-control amplifier and decides the binary nature of the voltage, and thus of the input optical signal.
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公开(公告)号：US06304357B1
公开(公告)日：2001-10-16
申请号：US09041973
申请日：1998-03-13
IPC分类号： H04B1006
CPC分类号： H04B10/6932 , H04B10/6933 , H04B10/695
摘要： An optical receiver generates a voltage signal having a predetermined swing from a current signal, and feeds the voltage signal to a decision circuit. An optical receiving element receives the input optical signal, converts the optical signal to a current signal, and provides the current signal to a preamplifier, which converts the input current signal into a voltage signal. The voltage signal is input to an amplifier having a limiting function, which linearly amplifies the voltage signal when the swing of the voltage signal is smaller than a predetermined value, and limitedly amplifies the voltage signal when the voltage signal is greater than the predetermined value. An automatic-gain-control amplifier receives the output from the amplifier with the limiting function, and amplifies the input voltage signal to a voltage signal having a constant swing. The decision circuit receives the output of the automatic-gain-control amplifier and decides the binary nature of the voltage, and thus of the input optical signal.
摘要翻译： 光接收器从电流信号产生具有预定摆幅的电压信号，并将电压信号馈送到判定电路。 光接收元件接收输入光信号，将光信号转换为电流信号，并将电流信号提供给前置放大器，将前置放大器转换成电压信号。 电压信号被输入到具有限制功能的放大器，当电压信号的摆动小于预定值时线性放大电压信号，并且当电压信号大于预定值时有限地放大电压信号。 自动增益控制放大器以限制功能接收来自放大器的输出，并将输入电压信号放大到具有恒定摆幅的电压信号。 决定电路接收自动增益控制放大器的输出，并确定电压的二进制特性，从而确定输入光信号的二进制特性。
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公开(公告)号：US07127170B2
公开(公告)日：2006-10-24
申请号：US10623160
申请日：2003-07-21
申请人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
发明人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
CPC分类号： H04Q11/0062 , H04J14/02 , H04J14/0201 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04Q2011/0009 , H04Q2011/0011 , H04Q2011/0013 , H04Q2011/0015 , H04Q2011/0039 , H04Q2011/0086
摘要： An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be sent to the plurality of terminals, respectively, from signals transmitted through the second optical communication path in optical frequency division multiplexing, a conversion unit for converting the selected signals into signals having a single optical frequency and an output unit for producing the converted signals to the terminals through the first optical communication paths, respectively.
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公开(公告)号：US07099596B2
公开(公告)日：2006-08-29
申请号：US10319514
申请日：2002-12-16
申请人： Koichi Watanabe , Ryoji Takeyari , Masataka Shirai
发明人： Koichi Watanabe , Ryoji Takeyari , Masataka Shirai
IPC分类号： H04B10/04
CPC分类号： H04B10/504 , H04B10/505
摘要： A high-speed optical transmitter having an optical modulator and a driver circuit while maintaining optical modulator performance. The high-speed optical transmitter comprises the optical modulator which modulates and outputs an input light in accordance with an applied voltage, and a driver circuit which outputs the applied voltage into the optical modulator and has an emitter follower circuit at an output stage thereof.
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公开(公告)号：US06850713B2
公开(公告)日：2005-02-01
申请号：US10320527
申请日：2002-12-17
IPC分类号： G02F1/025 , H04B10/516 , H04B10/54 , H04B10/61 , H01S3/10 , G02B26/00 , G02F1/00 , H04B10/12
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50572 , H04B10/506 , H04B10/508 , H04B2210/258 , H04L7/0008
摘要： With the normal modulation method, it is difficult to construct a Hilbert transform device because it is complicated. To solve the problem, a single sideband modulated optical pulse train is generated by driving a Mach-Zehnder optical modulator for optical pulse generation with a laser source's sine wave clock signals that have been rendered 90 degrees out of phase from each other. The generated pulse train is applied to an optical modulator, modulated with an NRZ (nonreturn-to-zero) data signal, and filtered by a narrow-band optical filter to obtain one of two sidebands.
摘要翻译： 利用正常的调制方法，由于复杂而难以构造希尔伯特变换装置。 为了解决这个问题，通过用激光源的正弦波时钟信号驱动用于光脉冲生成的马赫 - 曾德尔光学调制器来产生单个边带调制的光脉冲串，这些信号彼此相差90度。 所产生的脉冲串被施加到用NRZ（非归零）数据信号调制的光调制器，并由窄带滤光器滤波以获得两个边带之一。
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公开(公告)号：US5801864A
公开(公告)日：1998-09-01
申请号：US608725
申请日：1996-02-29
申请人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
发明人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
CPC分类号： H04Q11/0062 , H04J14/02 , H04J14/0201 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04Q2011/0009 , H04Q2011/0011 , H04Q2011/0013 , H04Q2011/0015 , H04Q2011/0039 , H04Q2011/0086
摘要： An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be sent to the plurality of terminals, respectively, from signals transmitted through the second optical communication path in optical frequency division multiplexing, a conversion unit for converting the selected signals into signals having a single optical frequency and an output unit for producing the converted signals to the terminals through the first optical communication paths, respectively.
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公开(公告)号：US5510921A
公开(公告)日：1996-04-23
申请号：US233974
申请日：1994-04-28
申请人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
发明人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
CPC分类号： H04Q11/0062 , H04J14/02 , H04J14/0201 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04Q2011/0009 , H04Q2011/0011 , H04Q2011/0013 , H04Q2011/0015 , H04Q2011/0039 , H04Q2011/0086
摘要： An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be sent to the plurality of terminals, respectively, from signals transmitted through the second optical communication path in optical frequency division multiplexing, a conversion unit for converting the selected signals into signals having a single optical frequency and an output unit for producing the converted signals to the terminals through the first optical communication paths, respectively.
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公开(公告)号：US20050175351A1
公开(公告)日：2005-08-11
申请号：US10623160
申请日：2003-07-21
申请人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
发明人： Atsushi Takai , Ryoji Takeyari , Akihiko Takase
CPC分类号： H04Q11/0062 , H04J14/02 , H04J14/0201 , H04J14/0204 , H04J14/0205 , H04J14/0206 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04Q2011/0009 , H04Q2011/0011 , H04Q2011/0013 , H04Q2011/0015 , H04Q2011/0039 , H04Q2011/0086
摘要： An optical frequency division multiplexing network includes first optical communication paths connected to terminals, respectively, a second optical communication path connected to the outside and a node composed of a selection unit for selecting signals having optical frequencies to be sent to the plurality of terminals, respectively, from signals transmitted through the second optical communication path in optical frequency division multiplexing, a conversion unit for converting the selected signals into signals having a single optical frequency and an output unit for producing the converted signals to the temrinals through the first optical communication paths, respectively.
摘要翻译： 光分频复用网络包括分别连接到终端的第一光通信路径，连接到外部的第二光通信路径和由用于选择要发送到多个终端的光频信号的选择单元组成的节点 通过光分频多路复用通过第二光通信路径发送的信号，将所选择的信号转换为具有单个光频率的信号的转换单元和用于通过第一光通信路径产生转换信号到转换信号的输出单元， 分别。
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公开(公告)号：US6005699A
公开(公告)日：1999-12-21
申请号：US927277
申请日：1997-09-11
申请人： Keiji Tomooka , Naohiro Sakakida , Shin Nishimura , Yoshihiro Ashi , Hironari Matsuda , Satoshi Aoki , Yukio Nakano , Masahiro Takatori , Toru Kazawa , Shinya Sasaki , Ryoji Takeyari , Hiroyuki Nakano
发明人： Keiji Tomooka , Naohiro Sakakida , Shin Nishimura , Yoshihiro Ashi , Hironari Matsuda , Satoshi Aoki , Yukio Nakano , Masahiro Takatori , Toru Kazawa , Shinya Sasaki , Ryoji Takeyari , Hiroyuki Nakano
CPC分类号： H04J14/0295 , H04B10/2939 , H04J14/02 , H04J14/0241 , H04Q11/0062 , H04Q11/0478 , H04J14/0226 , H04J14/0227 , H04J14/0279 , H04J14/0283 , H04J14/0284 , H04J14/0286 , H04J14/0294 , H04J2203/0051 , H04Q2011/0069 , H04Q2011/0081 , H04Q2011/0083
摘要： An optical transmission system accomplishes optical transmission to a long distance by combining a multiplexing line terminal with optical amplifiers, linear repeaters, and regenerators with optical amplifiers combined together. The system also accomplishes the optical transmission to a short distance by directly connecting the linear terminals therebetween, with an electric-to-optic converter replaced by an electric-to-optic converter having a semiconductor amplifier, with an optic-to-electric converter by an optic-to-electric converter having an avalanche photodiode as light receiver, an with no use of any optical booster amplifier and optical preamplifier in the multiplexing line terminal. With these, the optical transmission system can be easily constructed depending on the transmission distance required.
摘要翻译： 光传输系统通过将多路复用线路终端与光放大器，线性中继器和具有组合在一起的光放大器的再生器组合来实现长距离的光传输。 该系统还通过直接连接它们之间的线性端子来实现光传输到短距离，其中电光转换器由具有半导体放大器的电光转换器代替，其中光电转换器由 具有雪崩光电二极管作为光接收器的光电转换器，在复用线路终端中不使用任何光学增强放大器和光学前置放大器。 利用这些，可以根据所需的传输距离容易地构造光传输系统。
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公开(公告)号：US5844445A
公开(公告)日：1998-12-01
申请号：US736209
申请日：1996-10-25
申请人： Ryoji Takeyari
发明人： Ryoji Takeyari
IPC分类号： H03G3/10 , H03F1/34 , H03F3/08 , H03F3/343 , H03F3/45 , H03G1/00 , H04B1/18 , H03F1/32 , H03F17/00
摘要： A pre-amplifier disclosed in which low noise at the time of small input and linear amplification at the time of large input are compatible. In a pre-amplifier, such compatibility can be realized by constituting a current mirror circuit, with respect to a current of a first stage transistor in a transimpedance portion, by a by-passing transistor which is provided at an input side of the pre-amplifier. In such a configuration, by making a by-pass current flow proportionally to an input instantaneous current at the time of a large input, the transimpedance can be made small equivalently to thereby widen the dynamic range.
摘要翻译： 公开了一种前置放大器，其中在大输入时小输入和线性放大时的低噪声是兼容的。 在前置放大器中，这种兼容性可以通过构成相对于跨阻抗部分中的第一级晶体管的电流的电流镜电路来实现，该旁路晶体管设置在预放大器的输入侧， 放大器 在这种结构中，通过在大输入时与输入瞬时电流成比例地使旁路电流流动，可以将跨阻抗等同地变小，从而扩大动态范围。
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