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公开(公告)号：US07263291B2
公开(公告)日：2007-08-28
申请号：US10615218
申请日：2003-07-08
IPC分类号： H04J14/02
CPC分类号： G02B6/4246 , G02B6/29365 , G02B6/2938 , H04J14/02
摘要： This invention provides a system that combines a wavelength multiplexer with an FM discriminator for chirp reduction and wavelength locker in a filter to produce a wavelength division multiplexed signal with reduced chirp. A partially frequency modulation laser signal is converted into a substantially amplitude modulation laser signal. This conversion increases the extinction ratio of the input signal and further reduces the chirp. A wavelength division multiplexing (WDM) method is used for transmitting high capacity information through fiber optics systems where digital information is carried on separate wavelengths through the same fiber. Separate transmitters normally generate their respective signals that are transmitted at different wavelengths. These signals are then combined using a wavelength multiplexer to transmit the high capacity information through the fiber optic system. Various technologies can be used to multiplex the signals such as, for example, thin film filters, or arrayed waveguide gratings. In a WDM system, a wavelength locker may also be used that fixes the center wavelength of a transmitter to a reference. Wavelength lockers may include etalons or fiber gratings, either of which provides a reference wavelength. A control circuit typically compares the wavelength of the transmitter to the reference. An error signal adjusts the transmitter format wavelength by varying temperature or by other means to keep it locked to the reference wavelength.
摘要翻译： 本发明提供一种将滤波器中的波长多路复用器与用于啁啾减少的FM鉴频器和波长锁定器组合以产生具有减少的线性调频脉冲的波分复用信号的系统。 部分频率调制激光信号被转换成大致幅度的调制激光信号。 该转换增加了输入信号的消光比，并进一步减少了啁啾。 波分复用（WDM）方法用于通过光纤系统传输高容量信息，其中数字信息通过相同光纤在不同的波长上传送。 分离的发射机通常产生其以不同波长传输的各自的信号。 然后使用波长多路复用器组合这些信号以通过光纤系统传输高容量信息。 可以使用各种技术来复用信号，例如薄膜滤波器或阵列波导光栅。 在WDM系统中，还可以使用将发射机的中心波长固定为参考的波长锁定器。 波长锁定器可以包括标准具或光纤光栅，其中任一个提供参考波长。 控制电路通常将发射机的波长与参考相比较。 错误信号通过改变温度或通过其他方式调整发射器格式波长，使其锁定到参考波长。
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52.发明授权Method and apparatus for compensating for fiber nonlinearity in a transmission system 有权用于补偿传输系统中的光纤非线性的方法和装置公开(公告)号：US07813648B2
公开(公告)日：2010-10-12
申请号：US12187151
申请日：2008-08-06
IPC分类号： H04B10/18
CPC分类号： G02B5/281 , G02B6/29317 , G02B6/29358 , G02B6/29361 , G02B6/29395 , G02B6/29398 , G02B6/4246 , H04B10/25133 , H04B10/25137 , H04B10/2543
摘要： A transmitter includes a frequency modulated laser. An optical spectrum reshaper (OSR) is positioned to receive the frequency modulated signal and has a transmission function effective to convert the frequency modulation to amplitude modulation. An optical fiber channel has a first end positioned to receive the filtered signal and a second end proximate a receiver. A filter is positioned between the second end and the receiver and has a peak transmission frequency thereof located on a transmission edge of the OSR, such as at a peak logarithmic derivative value of the transmission function of the optical spectrum reshaper. In some embodiments a first OSR is positioned to receive the frequency modulated signal and configure to output a filtered signal wherein high frequency portions are more attenuated than low frequency portions. A second OSR at the receiver attenuates the low frequency portions substantially more than the high frequency portions.
摘要翻译： 发射机包括调频激光器。 定位光谱整形器（OSR）以接收频率调制信号，并具有有效将频率调制转换为幅度调制的传输功能。 光纤通道具有位于接收滤波信号的第一端和靠近接收器的第二端。 滤波器位于第二端和接收器之间，并且其峰值发送频率位于OSR的发送边缘，例如在光谱整形器的发送功能的峰值对数导数值处。 在一些实施例中，第一OSR被定位成接收调频信号并且被配置为输出滤波信号，其中高频部分比低频部分更多衰减。 在接收器处的第二OSR基本上比高频部分衰减低频部分。
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公开(公告)号：US07742542B2
公开(公告)日：2010-06-22
申请号：US11157055
申请日：2005-06-20
IPC分类号： H04L27/36
CPC分类号： H04L27/361
摘要： 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：US07616902B2
公开(公告)日：2009-11-10
申请号：US12062356
申请日：2008-04-03
IPC分类号： H04B10/04
CPC分类号： H04B10/504 , G02B5/281 , G02B6/29358 , G02B6/29395 , G02B6/29398 , G02B6/4246
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：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：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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58.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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公开(公告)号：US20120251130A1
公开(公告)日：2012-10-04
申请号：US13493849
申请日：2012-06-11
申请人： Xueyan Zheng , Jianying Zhou , Vincent Bu , Daniel Mahgerefteh
发明人： Xueyan Zheng , Jianying Zhou , Vincent Bu , Daniel Mahgerefteh
IPC分类号： H04B10/04
CPC分类号： H01S5/0427 , H01S5/02284 , H01S5/06837 , H01S5/0687
摘要： Thermal chirp compensation in a chirp managed laser. In one example embodiment, a laser package including a laser and an optical spectrum reshaper configured to convert frequency modulated optical signals from the laser into an amplitude modulated optical signals is provided. A thermal chirp compensation device is in communication with the laser package and a laser driver. The thermal chirp compensation device includes means for generating bias condition and temperature specific thermal chirp compensation signals that each corresponds to a predetermined level of thermal chirp that is induced in the laser by operating the laser at a particular bias condition and temperature.
摘要翻译： 啁啾管理激光器中的热啁啾补偿。 在一个示例性实施例中，提供了包括激光器和被配置成将来自激光器的调频光信号转换成幅度调制光信号的光谱整形器的激光器封装。 热啁啾补偿装置与激光器封装和激光驱动器通信。 热啁啾补偿装置包括用于产生偏置条件和温度特定热啁啾补偿信号的装置，每个对应于通过在特定偏压条件和温度下操作激光而在激光器中感应的预定水平的热啁啾。
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