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    • 66. 发明申请
    • Method and apparatus for transmitting a signal using simultaneous FM and AM modulation
    • US20060029397A1
    • 2006-02-09
    • US11084633
    • 2005-03-18
    • Daniel MahgereftehYasuhiro MatsuiParviz TayebatiXueyan Zheng
    • Daniel MahgereftehYasuhiro MatsuiParviz TayebatiXueyan Zheng
    • H04B10/04
    • H04B10/508
    • There is provided method for transmitting binary data contained in respective successive time cells, the data being in the form of an optical signal obtained by amplitude modulation and frequency modulation of an optical carrier wave, with a 0 bit data value having a 0 bit mean amplitude having a 0 bit amplitude time duration and a 0 bit frequency having a 0 bit frequency duration, and a 1 bit data value having a 1 bit mean amplitude having a 1 bit amplitude time duration and a 1 bit frequency having a 1 bit frequency duration; the improvement wherein: independently adjusting the 0 bit mean amplitude relative to the 1 bit mean amplitude; independently adjusting the 0 bit frequency relative to the 1 bit frequency; and independently adjusting time duration of the frequency profile of the 1 bit relative to the time duration of the amplitude profile of the 1 bit, whereby to extend the error-free propagation of the optical signal though a dispersive optical fiber beyond the dispersion limit. There is provided a method for transmitting Non-Return-To-Zero (NRZ) binary data contained in respective successive time cells, the data being in the form of an optical signal obtained by amplitude modulation and frequency modulation of an optical carrier wave, with a 0 bit data value having a 0 bit mean amplitude having a 0 bit amplitude time duration and a 0 bit frequency having a 0 bit frequency duration, and a 1 bit data value having a 1 bit mean amplitude having a 1 bit amplitude time duration and a 1 bit frequency having a 1 bit frequency duration; the improvement wherein: the phase across each 1 bit data value is substantially constant, and the phase of the carrier changes across each and every 0 bit by an amount equal to the product of the frequency difference between the 1 bit and the 0 bit and the duration of the 0 bit; whereby to extend the error-free propagation of the optical signal though a dispersive optical fiber beyond the dispersion limit. In accordance with one form of the present invention, there is provided a method for transmitting binary data contained in respective successive time cells, the data being in the form of an optical signal obtained by amplitude modulation and frequency modulation of an optical carrier wave, with a 0 bit data value having a 0 bit mean amplitude having a 0 bit amplitude time duration and a 0 bit frequency having a 0 bit frequency duration, and a 1 bit data value having a 1 bit mean amplitude having a 1 bit amplitude time duration and a 1 bit frequency having a 1 bit frequency duration; the improvement wherein: the amplitude profile of the 1 bit is substantially bell-shaped, and the frequency profile of the 1 bit is substantially square-shaped, with steeper rise and fall time and a wider flat top region; whereby to extend the error-free propagation of the optical signal though a dispersive optical fiber beyond the dispersion limit.
    • 67. 发明申请
    • Optical system comprising an FM source and a spectral reshaping element
    • US20060029358A1
    • 2006-02-09
    • US11068032
    • 2005-02-28
    • Daniel MahgereftehYasuhiro MatsuiXueyan ZhengBart JohnsonDuncan WalkerParviz Tayebati
    • Daniel MahgereftehYasuhiro MatsuiXueyan ZhengBart JohnsonDuncan WalkerParviz Tayebati
    • H04N11/02
    • H04B10/58H04B10/25137H04B10/508
    • In one form of the present invention, there is provided a fiber optic communication system comprising: an optical signal source adapted to receive a base binary signal and produce a first signal, said first signal being frequency modulated; and an optical spectrum reshaper adapted to reshape the first signal into a second signal, said second signal being amplitude modulated and frequency modulated; characterized in that: the frequency characteristics of said first signal, and the optical characteristics of said optical spectrum reshaper, being such that the frequency characteristics of said second signal are configured so as to increase the tolerance of the second signal to dispersion in a transmission fiber. In another form of the present invention, there is provided an optical transmitter comprising: a frequency modulated source for generating a first frequency modulated signal, and an amplitude modulator for receiving the first frequency modulated signal and for generating a second amplitude and frequency modulated signal. In another form of the present invention, there is provided a method for transmitting an optical signal through a transmission fiber comprising: receiving a base binary signal; operating an optical signal source using the base binary signal to produce a first signal, said first signal being frequency modulated; passing the frequency modulated signal through an optical spectrum reshaper so as to reshape the first signal into a second signal, said second signal being amplitude modulated and frequency modulated; the frequency characteristics of said first signal, and the optical characteristics of said optical spectrum reshaper, being such that the frequency characteristics of said second signal are configured so as to increase the tolerance of the second signal to dispersion in a transmission fiber; and passing the second signal through a transmission fiber. In another form of the present invention, there is provided a method for transmitting a base signal, comprising: using the base signal to produce a frequency modulated signal; and providing an amplitude modulator for receiving the frequency modulated signal and for generating an amplitude and frequency modulated signal.
    • 68. 发明申请
    • Carrier suppression using adiabatic frequency modulation (AFM)
    • 使用绝热频率调制(AFM)的载波抑制
    • US20060002717A1
    • 2006-01-05
    • US11037893
    • 2005-01-18
    • Yasuhiro MatsuiDaniel Mahgerefteh
    • Yasuhiro MatsuiDaniel Mahgerefteh
    • H04B10/04
    • H04B10/505H04B10/5165
    • A method for suppression of the optical carrier of an optically modulated digital signal, comprising of the steps of: modulating the amplitude of an optical carrier with digital input data to generate an amplitude modulated optical signal; and modulating the frequency of the optical carrier of the resulting optical signal with the same digital input data. A fiber optic system comprising: an optical source adapted to produce an adiabatically chirped amplitude modulated optical signal; an optical fiber adapted to receive the optical signal; and an optical receiver; wherein the optical power of the signal launched into the fiber exceeds the stimulated Brillouin threshold of the transmission fiber for a single frequency, continuous wave signal. A system for suppression of the optical carrier of an optically modulated digital signal comprising: modulating the amplitude and the frequency of an optical carrier with digital input data to generate an amplitude and frequency modulated optical signal, whereby to limit the stimulated Brillouin scattering loss of a transmission fiber to a selected value.
    • 一种用于抑制光调制数字信号的光载波的方法,包括以下步骤:用数字输入数据调制光载波的振幅,以产生调幅光信号; 并用相同的数字输入数据调制所得光信号的光载波的频率。 一种光纤系统,包括:适于产生绝热啁啾的调幅光信号的光源; 适于接收光信号的光纤; 和光接收机; 其中发射到光纤中的信号的光功率超过单频连续波信号的传输光纤的受激布里渊阈值。 一种用于抑制光学调制数字信号的光载波的系统,包括:用数字输入数据调制光载波的幅度和频率,以产生幅度和频率调制的光信号,从而限制被调制的布里渊散射损耗 传输光纤到选定的值。
    • 70. 发明申请
    • Adjusting apparatus for adjusting inclination of recording head of inkjet printer
    • 用于调节喷墨打印机记录头倾斜度的调节装置
    • US20050052495A1
    • 2005-03-10
    • US10934180
    • 2004-09-03
    • Yasuhiro Matsui
    • Yasuhiro Matsui
    • B41J2/01B41J2/14B41J2/175B41J25/304B41J25/34
    • B41J2/1752B41J2/14B41J2202/14
    • There is provided an ink-jet printer for forming an image in a main scanning direction for each line. The ink-jet printer comprises a recording head to form an image, wherein a plurality of nozzles are arranged in an aligned direction in the recording head; a mounting section on which the recording head is mounted; a fixing member to apply an elastic force so as to fix the recording head on the mounting section; and an inclination adjusting member to push a side of the recoding head located along the aligned direction of the nozzles against the elastic force of the fixing member so as to displace the side of the recording head so that the inclination adjusting member adjusts an inclination of the aligned direction of the nozzles for the main scanning direction.
    • 提供了一种喷墨打印机,用于在每条线的主扫描方向上形成图像。 喷墨打印机包括用于形成图像的记录头,其中多个喷嘴沿记录头的排列方向排列; 其上安装有记录头的安装部分; 固定构件,用于施加弹性力以将记录头固定在安装部分上; 以及倾斜调节构件,以抵抗固定构件的弹力推动沿着喷嘴的排列方向定位的记录头的一侧,以便使记录头的侧面移位,使得倾斜调节构件调节 用于主扫描方向的喷嘴对齐方向。