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公开(公告)号：US20080095540A1
公开(公告)日：2008-04-24
申请号：US10598503
申请日：2005-06-02
申请人： Katsuya Oda , Hitomaro Tohgoh , Yoshiyasu Sato , Hiroaki Asano
发明人： Katsuya Oda , Hitomaro Tohgoh , Yoshiyasu Sato , Hiroaki Asano
CPC分类号： H04B10/2575
摘要： An object of the invention is to clear up factors in deterioration due to optical reflection and to provide an optical transmission apparatus and an optical transmission system in which a superior optical transmission characteristic can be obtained for analog signals even if a reflection phenomenon occurs in an optical transmission line. There are provided a frequency converter (3) for converting the frequency band of a to-be-transmitted electric signal into a predetermined frequency band higher that this frequency band, and a semiconductor laser (4) serving as an electro-optic converter for performing electro-optic conversion upon the frequency-converted electric signal.
摘要翻译： 本发明的目的是清除由于光反射引起的劣化的因素，并且提供一种光传输装置和光传输系统，其中即使在光学器件中发生反射现象也可以获得模拟信号的优异的光传输特性 传输线。 提供了一种变频器（3），用于将待发射电信号的频带转换成该频带高的预定频带，以及用作电光转换器的半导体激光器（4），用于执行 经变频电信号的电光转换。
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公开(公告)号：US20050248822A1
公开(公告)日：2005-11-10
申请号：US10525507
申请日：2003-08-26
申请人： Hitomaro Tohgoh , Hiroaki Asano , Hitoshi Uno , Masaki Kobayashi , Nobutaka Itabashi , Nobuyuki Akiya
发明人： Hitomaro Tohgoh , Hiroaki Asano , Hitoshi Uno , Masaki Kobayashi , Nobutaka Itabashi , Nobuyuki Akiya
CPC分类号： G02B6/421 , G02B6/4214 , G02B6/4246
摘要： A small-sized optical transceiver module, wherein any stress attributable to the differences in coefficient of thermal expansion between a transmission section optical system, a receiving section optical system, and the components which integrate and fix them and the like is not applied therebetween, and which is not influenced by any stress at the time of attachment/detachment of the optical connector is disclosed. The optical transceiver module is one wherein the transmission section optical system 1 which comprises a laser diode and an optical fiber or an optical waveguide optically connected to the laser diode and of which the electric input terminal of the laser diode is a flexible cable, a receiving section optical system 2 which comprises a photo diode and an optical fiber or an optical waveguide optically connected to the photo diode and of which the electric output terminal of the photo diode is a flexible cable, and an optical I/O optical receptacle 3 are optically connected, mechanically integrated and fixed, and the two flexible cables are spatially spaced out and disposed.
摘要翻译： 一种小尺寸的光收发模块，其中不会在其间施加归因于传输部分光学系统，接收部分光学系统和其组合和固定它们的部件之间的热膨胀系数差异的任何应力， 公开了在光连接器的附接/拆卸时不受任何应力的影响。 光收发器模块是其中传输部分光学系统1包括激光二极管和光纤或光学波导，光学连接到激光二极管，激光二极管的电输入端是柔性电缆，接收器 包括光电二极管和光纤或与光电二极管光学连接的光波导，其光电二极管的电输出端为柔性电缆，光学I / O光插座3为光学 连接，机械一体化和固定，并且两个柔性电缆在空间上间隔开并布置。
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3.发明授权公开(公告)号：US06819840B2
公开(公告)日：2004-11-16
申请号：US10176106
申请日：2002-06-21
申请人： Hitomaro Tohgoh , Hiroaki Asano
发明人： Hitomaro Tohgoh , Hiroaki Asano
IPC分类号： G02B630
CPC分类号： G02B6/4214 , G02B6/4228 , G02B6/4239 , G02B6/4246 , H01L2224/48091 , H01L2924/00014
摘要： The present invention discloses an optical transmitting/receiving module designed in small size and produced at low cost without the need to use an optical waveguide, which requires complicated process and larger area, and the invention also discloses a method for manufacturing such an optical transmitting/receiving module. According to the present invention, a V-groove running in linear direction and a vertical groove (a groove having vertical side surfaces) crossing obliquely said V-groove at the end of the V-groove, an optical fiber core is arranged to the end of the V-groove, a wavelength selective filter is arranged in the vertical groove, and a light emitting element and a light receiving element are arranged respectively in transmitting direction and reflecting direction of the wavelength selective filter.
摘要翻译： 本发明公开了一种设计成小尺寸且低成本生产的光发射/接收模块，而不需要使用需要复杂工艺和更大面积的光波导，本发明还公开了一种用于制造这种光发射/ 接收模块。 根据本发明，在V形槽的端部沿直线行进的V形槽和倾斜地与所述V形槽交叉的垂直槽（具有垂直侧面的槽）形成一个光纤芯， 在波长选择滤光器的透射方向和反射方向上分别布置有波长选择滤光器，并且发光元件和受光元件分别布置在垂直槽中。
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公开(公告)号：US20080031635A1
公开(公告)日：2008-02-07
申请号：US10596893
申请日：2004-12-06
申请人： Hitomaro Tohgoh , Katsuya Oda , Yoshiyasu Sato , Hiroaki Asano
发明人： Hitomaro Tohgoh , Katsuya Oda , Yoshiyasu Sato , Hiroaki Asano
IPC分类号： H04B10/155
CPC分类号： H01S5/06804 , H01S5/0427 , H01S5/0683 , H01S2301/02
摘要： An object of the present invention is to provide an optical transmitter that can suppress degradation of distortion characteristic and RIN characteristic caused by relaxation oscillation at high temperature by controlling average driving current of a light emitting element so that the average optical output power of the light emitting element is increased as the temperature increases like a case where the environmental temperature around the light emitting element increases.
摘要翻译： 本发明的目的是提供一种光发送器，其通过控制发光元件的平均驱动电流来抑制由高温下的弛豫振荡引起的失真特性和RIN特性的劣化，使得发光的平均光输出功率 随着温度升高，元件随着发光元件周围的环境温度升高而增加。
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公开(公告)号：US20070197258A1
公开(公告)日：2007-08-23
申请号：US10592329
申请日：2005-06-02
申请人： Katsuya Oda , Hitomaro Tohgoh , Yoshiyasu Sato , Hiroaki Asano
发明人： Katsuya Oda , Hitomaro Tohgoh , Yoshiyasu Sato , Hiroaki Asano
CPC分类号： H04J14/02 , H04B10/25758 , H04J14/0221
摘要： Up and down signal levels in a wireless base station and a forward base station can be automatically adjusted into predetermined levels respectively with a simple configuration. In an interface portion 12, a pilot signal P of a predetermined level is generated by a pilot signal generator 120, and multiplexed with a down transmission signal 111 from a wireless base station 11 by a multiplexer 121. The multiplexed signal is amplified with a constant gain by a down signal amplifier 122, then converted into a down optical signal by an electro-optic converter 123, wavelength-multiplexed by an optical multi/demultiplexer 124, sent out to an optical fiber 15, and transmitted to a forward base station 13. In the forward base station 13, the down optical signal wavelength-demultiplexed by an optical multi/demultiplexer 124 is converted into a down electric signal by an opto-electric converter 125, and the pilot signal P is demultiplexed by a demultiplexer 133. A gain control unit 130 detects an absolute level of the pilot signal P, and outputs a gain control signal G1 to set the level value at a predetermined rated value. A down signal gain variable amplifier 134 and an up signal gain variable amplifier 136 amplify the down transmission signal and the up reception signal respectively with a gain controlled by the gain control signal G1.
摘要翻译： 无线基站和前向基站中的上下信号电平可以分别以简单的配置自动调整到预定的电平。 在接口部分12中，由导频信号发生器120产生预定电平的导频信号P，并通过多路复用器121与来自无线基站11的下行发送信号111进行多路复用。 多路复用信号由下行信号放大器122以恒定增益放大，然后由电光转换器123转换成降低的光信号，由光多路复用器124波分复用，发送到光纤15， 并发送到前向基站13。 在正向基站13中，由光多路复用器124波分复用的下行光信号通过光电转换器125转换成降电信号，并且导频信号P被解复用器133解复用。 增益控制单元130检测导频信号P的绝对电平，并输出增益控制信号G 1，将电平值设定在预定的额定值。 下降信号增益可变放大器134和上升信号增益可变放大器136分别利用增益控制信号G 1所控制的增益放大下行传输信号和上行接收信号。
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公开(公告)号：US20050276320A1
公开(公告)日：2005-12-15
申请号：US11148672
申请日：2005-06-09
IPC分类号： H04J14/00 , H04B10/2507 , H04B10/2575 , H04J14/02 , H04L5/16
CPC分类号： H04B10/25753
摘要： To provide a signal transmission system which can increase the number of slave stations being coupled with a simple configuration, A master station 10 communicates with a plurality of slave stations 20 each having an antenna 25. The slave station 20 includes a frequency converter 26 for converting a signal of a radio frequency band received through the antenna into an intermediate frequency band signal, and an E/O converter 27 for converting an electrical signal into an optical signal. The master station 10 includes O/E converters 14a to 14c for converting signals received from the slave stations 20 into electrical signals, respectively, a synthesizer 17 for synthesizing the signals thus converted into the electrical signals and a frequency converter 18 for converting the synthesized signal into a radio frequency band signal.
摘要翻译： 为了提供可以增加与简单配置相结合的从站数量的信号传输系统，主站10与多个具有天线25的从站20进行通信。 从站20包括用于将通过天线接收的无线电频带的信号转换成中频带的频率转换器26和用于将电信号转换为光信号的E / O转换器27。 主站10包括用于将从从站20接收的信号分别转换为电信号的O / E转换器14 a至14 c，用于合成这样转换成电信号的信号的合成器17和用于转换 合成信号变成无线电频带信号。
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