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公开(公告)号：US07352968B2
公开(公告)日：2008-04-01
申请号：US11016020
申请日：2004-12-17
CPC分类号： H04B10/541 , G02B6/12009 , H04B10/506 , H04B2210/516
摘要： There is provided a fiber optic system comprising: a multi-wavelength source adapted to generate frequency modulated signals having different wavelengths, λ1, λ2, . . . , λn; and an arrayed waveguide grating adapted to convert the multiplicity of frequency modulated signals into a multiplicity of substantially amplitude modulated signals, and spatially combine the different wavelengths λ1, λ2, . . . , λn. And there is provided a method for transmitting an optical signal through a fiber comprising: operating a multi-wavelength source so as to generate frequency modulated signals having different wavelengths, λ1, λ2, . . . , λn; passing the frequency modulated signals through an arrayed waveguide grating so as to convert the frequency modulated signals into substantially amplitude modulated signals, and spatially combine the different wavelengths λ1, λ2, . . . , λn; and passing the substantially amplitude modulated signals into the fiber. And there is provided a fiber optic system comprising: a multi-wavelength source adapted to generate frequency modulated signals having different wavelengths, λ1, λ2, . . . , λn; and a beam combiner adapted to spatially combine the signals having different wavelengths and pass them into a periodic optical spectrum reshaper (OSR) to generate a plurality of substantially amplitude modulated signals having wavelengths λ1, λ2, . . . , λn.
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公开(公告)号：US20060233556A1
公开(公告)日：2006-10-19
申请号：US11272100
申请日：2005-11-08
IPC分类号： H04B10/00
CPC分类号： H04B10/504 , G02B5/281 , G02B6/29358 , G02B6/29362 , G02B6/29394 , G02B6/29398 , H04B10/25133 , H04B10/58
摘要： This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filter may compensate for the dispersion in the fiber optic transmission medium and may also lock the wavelength of the laser source.
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公开(公告)号：US07054538B2
公开(公告)日：2006-05-30
申请号：US10680607
申请日：2003-10-06
CPC分类号： G02B6/29358 , G02B5/288 , G02B6/29392 , G02B6/29394 , H04B10/25133
摘要： This invention provides a flat dispersion frequency discriminator (FDFD) capable of having a substantially flat dispersion with either a positive or negative dispersion along the spectrum region of the discriminator. This way, a FDFD may not cause substantial distortion of the intensity patter of its output to minimize the occurrence distortion due to overshooting or undershooting of the intensity pattern depending on the relative spectral alignment of the laser output relative to the filter transmission.
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公开(公告)号：US20060039502A1
公开(公告)日：2006-02-23
申请号：US11157055
申请日：2005-06-20
IPC分类号： H04L27/04
CPC分类号： H04L27/361
摘要： A method of transmitting a base band binary data contained in respective successive time cells, the data being in the form of a signal obtained by amplitude modulation and frequency modulation of a carrier wave with a 0 bit data having a 0 bit mean amplitude and a 0 bit mean frequency and a 0 bit duration and a 1 bit data having a 1 bit mean amplitude and a 1 bit mean frequency and a 1 bit duration the improvement wherein the amplitude and frequency are modulated with the same binary base band signal whereby to decrease the spectral width of the resulting modulated signal below the spectral width of the base band signal. A method for transmitting a base band digital data signal having a bit period and a first bandwidth, comprising providing a carrier wave having a carrier amplitude and a carrier frequency, and synchronously modulating both the carrier amplitude and carrier frequency with the base band digital signal, so as to reduce the bandwidth of the modulated carrier wave below the bandwidth of the base band signal. A method for transmitting a base band digital data signal having a bit period and a first bandwidth, comprising providing a carrier wave having a carrier phase and a carrier frequency, and synchronously modulating both the carrier phase and carrier frequency with the base band digital signal, so as to reduce the bandwidth of the modulated carrier wave below the bandwidth of the base band signal.
摘要翻译： 一种发送包含在各个连续时间单元中的基带二进制数据的方法，该数据是通过具有0位平均幅度的0位数据的载波调幅和频率调制获得的信号的形式，以及0 位平均频率和0位持续时间以及具有1比特平均幅度和1比特平均频率和1比特持续时间的1比特数据，其中以相同的二进制基带信号调制幅度和频率，从而减少 所得调制信号的频谱宽度低于基带信号的频谱宽度。 一种用于发送具有位周期和第一带宽的基带数字数据信号的方法，包括提供具有载波幅度和载波频率的载波，并且使用基带数字信号同时调制载波幅度和载波频率， 以便将调制载波的带宽降低到基带信号的带宽以下。 一种用于发送具有位周期和第一带宽的基带数字数据信号的方法，包括：提供具有载波相位和载波频率的载波，并且使用所述基带数字信号同时调制载波相位和载波频率， 以便将调制载波的带宽降低到基带信号的带宽以下。
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公开(公告)号：US20050286829A1
公开(公告)日：2005-12-29
申请号：US11040053
申请日：2005-01-21
CPC分类号： H04B10/299
摘要： In one form of the invention, there is provided a fiber optic system comprising: an optical signal source adapted to produce a frequency and amplitude modulated optical digital signal; and a semiconductor optical amplifier adapted to receive the frequency and amplitude modulated optical digital signal and generate negative transient chirp at the transitions between bits. In another form of the invention, there is provided a fiber optic system comprising: an optical source adapted to generate a frequency modulated signal; a semiconductor optical amplifier adapted to receive and amplify the frequency modulated signal; and an optical spectrum reshaper adapted to receive the amplified frequency modulated signal and to utilize the amplified frequency modulated signal to increase the amplitude modulation of the signal.
摘要翻译： 在本发明的一种形式中，提供了一种光纤系统，包括：适于产生频率和幅度调制光数字信号的光信号源; 以及适于接收频率和幅度调制的光数字信号并在位之间的转换处产生负瞬态啁啾的半导体光放大器。 在本发明的另一形式中，提供了一种光纤系统，包括：适于产生调频信号的光源; 适于接收和放大调频信号的半导体光放大器; 以及适于接收放大的频率调制信号并利用放大的调频信号来增加信号的幅度调制的光谱整形器。
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96.发明申请公开(公告)号：US20050169638A1
公开(公告)日：2005-08-04
申请号：US11015686
申请日：2004-12-17
CPC分类号： H04B10/25137 , H04B10/695
摘要： A fiber optic communication system comprising: an optical signal source adapted to produce a frequency modulated signal; and an optical spectrum reshaper (OSR) adapted to convert the frequency modulated signal into a substantially amplitude modulated signal, wherein the optical spectrum reshaper is adapted to compensate for at least a portion of a dispersion in a transmission fiber; and further including a transmission fiber coupled to the optical source, a receiver and a decision circuit coupled to the transmission fiber.
摘要翻译： 一种光纤通信系统，包括：适于产生调频信号的光信号源; 以及适于将所述调频信号转换成基本幅度调制信号的光谱整形器（OSR），其中所述光谱整形器适于补偿传输光纤中的色散的至少一部分; 并且还包括耦合到所述光源的传输光纤，接收器和耦合到所述传输光纤的判定电路。
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公开(公告)号：US20050163512A1
公开(公告)日：2005-07-28
申请号：US11016020
申请日：2004-12-17
IPC分类号： H04B10/04
CPC分类号： H04B10/541 , G02B6/12009 , H04B10/506 , H04B2210/516
摘要： There is provided a fiber optic system comprising: a multi-wavelength source adapted to generate frequency modulated signals having different wavelengths, λ1, λ2, . . . , λn; and an arrayed waveguide grating adapted to convert the multiplicity of frequency modulated signals into a multiplicity of substantially amplitude modulated signals, and spatially combine the different wavelengths λ1, λ2, . . . , λn. And there is provided a method for transmitting an optical signal through a fiber comprising: operating a multi-wavelength source so as to generate frequency modulated signals having different wavelengths, λ1, λ2, . . . , λn; passing the frequency modulated signals through an arrayed waveguide grating so as to convert the frequency modulated signals into substantially amplitude modulated signals, and spatially combine the different wavelengths λ1, λ2, . . . , λn; and passing the substantially amplitude modulated signals into the fiber. And there is provided a fiber optic system comprising: a multi-wavelength source adapted to generate frequency modulated signals having different wavelengths, λ1, λ2, . . . , λn; and a beam combiner adapted to spatially combine the signals having different wavelengths and pass them into a periodic optical spectrum reshaper (OSR) to generate a plurality of substantially amplitude modulated signals having wavelengths λ1, λ2, . . . , λn.
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98.发明授权
公开(公告)号：US6046841A
公开(公告)日：2000-04-04
申请号：US66744
申请日：1998-04-24
申请人： Daniel Mahgerefteh , Pak Shing Cho
发明人： Daniel Mahgerefteh , Pak Shing Cho
CPC分类号： H04B10/2914 , H01S5/50 , G02F1/3517 , H01S5/509
摘要： The optical signal produced by a semiconductor-optical-amplifier based wavelength converter is passed through an optical discriminator. The resulting signal has improved extinction ratio for return-to-zero data and improved high-frequency response for both non-return-to-zero and return-to-zero data.
摘要翻译： 由基于半导体光放大器的波长转换器产生的光信号通过光鉴别器。 所得到的信号具有改善的归零数据的消光比，并且改善了非归零和归零归零数据的高频响应。
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