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21.发明授权Optical FM source based on intra-cavity phase and amplitude modulation in lasers 有权基于激光器内腔内相位和幅度调制的光学FM源公开(公告)号：US07613401B2
公开(公告)日：2009-11-03
申请号：US11787163
申请日：2007-04-13
IPC分类号： H04B10/04
CPC分类号： H04B10/5161 , H04B10/505 , H04B10/516 , H04B10/541 , H04B10/5563 , H04B2210/517
摘要： A fiber optic communication system comprising: an optical signal source adapted to receive a binary base signal having a bit period T, and generate a first signal, wherein the first signal is frequency modulated; and an optical spectrum reshaper (OSR) adapted to reshape the first signal into a second signal, wherein the second signal is amplitude modulated and frequency modulated; characterized in that: the optical signal source is a laser in which frequency modulation is generated by modulating the loss of the laser cavity. A method for transmitting a signal, comprising: receiving a binary base signal having a bit period T, and generating a first signal, wherein the first signal is frequency modulated; and reshaping the first signal into a second signal, wherein the second signal is amplitude modulated and frequency modulated; characterized in that: the first signal is frequency modulated by using a laser in which frequency modulation is generated by modulating the loss of the laser cavity. A fiber optic communication system comprising: an optical signal source adapted to receive a binary base signal having a bit period T, and generate a first signal, wherein the first signal is frequency modulated; and an optical spectrum reshaper (OSR) adapted to reshape the first signal into a second signal, wherein the second signal is amplitude modulated and frequency modulated; characterized in that: the optical signal source is a laser in which frequency modulation is generated by modulating the phase of the laser cavity.
摘要翻译： 一种光纤通信系统，包括：光信号源，适于接收具有位周期T的二进制基本信号，并产生第一信号，其中所述第一信号被频率调制; 以及适于将所述第一信号重新形成第二信号的光谱整形器（OSR），其中所述第二信号被幅度调制和频率调制; 其特征在于：光信号源是通过调制激光腔的损耗来产生频率调制的激光器。 一种用于发送信号的方法，包括：接收具有位周期T的二进制基本信号，并产生第一信号，其中第一信号被频率调制; 以及将所述第一信号重新形成第二信号，其中所述第二信号被幅度调制和频率调制; 其特征在于：通过使用通过调制激光腔的损耗产生频率调制的激光来对第一信号进行频率调制。 一种光纤通信系统，包括：光信号源，适于接收具有位周期T的二进制基本信号，并产生第一信号，其中所述第一信号被频率调制; 以及适于将所述第一信号重新形成第二信号的光谱整形器（OSR），其中所述第二信号被幅度调制和频率调制; 其特征在于：光信号源是通过调制激光腔的相位来产生频率调制的激光器。
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公开(公告)号：US07356264B2
公开(公告)日：2008-04-08
申请号：US11016466
申请日：2004-12-17
IPC分类号： H04B10/04
CPC分类号： H04B10/25137
摘要： A fiber optic transmitter comprising: a digital driver adapted to adjust the rise time and fall time of a digital input signal; an optical source adapted to receive the digital signal and produce a frequency modulated optical signal; and an optical spectrum reshaper adapted to convert the frequency modulated optical signal to an amplitude modulated optical signal. A method for transmitting an optical signal through a fiber comprising: receiving a digital input signal; adjusting the rise time and fall time of the digital input signal so as to produce an adjusted digital input signal; passing the adjusted digital input signal to an optical source so as to produce a frequency modulated optical signal; passing the frequency modulated optical signal through an optical spectrum reshaper so as to convert the frequency modulated optical signal to an amplitude modulated optical signal; and passing the amplitude modulated signal into the fiber.
摘要翻译： 一种光纤发射机，包括：数字驱动器，适于调整数字输入信号的上升时间和下降时间; 适于接收数字信号并产生调频光信号的光源; 以及适于将调频光信号转换为调幅光信号的光谱整形器。 一种通过光纤发送光信号的方法，包括：接收数字输入信号; 调整数字输入信号的上升时间和下降时间，以产生经调整的数字输入信号; 将经调整的数字输入信号传送到光源，以产生调频光信号; 使调频光信号通过光谱整形器，以将调频光信号转换成调幅光信号; 并将幅度调制信号传递到光纤中。
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公开(公告)号：US20050169642A1
公开(公告)日：2005-08-04
申请号：US11016466
申请日：2004-12-17
CPC分类号： H04B10/25137
摘要： A fiber transmitter comprising: a digital driver adapted to adjust the rise time and fall time of a digital input signal; an optical source adapted to receive the digital signal and produce a frequency modulated optical signal; and an optical spectrum reshaper adapted to convert the frequency modulated optical signal to an amplitude modulated optical signal. A method for transmitting an optical signal through a fiber comprising: receiving a digital input signal; adjusting the rise time and fall time of the digital input signal so as to produce an adjusted digital input signal; passing the adjusted digital input signal to an optical source so as to produce a frequency modulated optical signal; passing the frequency modulated optical signal through an optical spectrum reshaper so as to convert the frequency modulated optical signal to an amplitude modulated optical signal; and passing the amplitude modulated signal into the fiber.
摘要翻译： 一种光纤发射机，包括：适于调整数字输入信号的上升时间和下降时间的数字驱动器; 适于接收数字信号并产生调频光信号的光源; 以及适于将调频光信号转换为调幅光信号的光谱整形器。 一种通过光纤发送光信号的方法，包括：接收数字输入信号; 调整数字输入信号的上升时间和下降时间，以产生经调整的数字输入信号; 将经调整的数字输入信号传送到光源，以产生调频光信号; 使调频光信号通过光谱整形器，以将调频光信号转换成调幅光信号; 并将幅度调制信号传递到光纤中。
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公开(公告)号：US20050152702A1
公开(公告)日：2005-07-14
申请号：US11052945
申请日：2005-02-08
IPC分类号： G02B5/28 , G02B6/34 , H04B10/155 , H04B10/18 , 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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25.发明授权公开(公告)号：US07663762B2
公开(公告)日：2010-02-16
申请号：US10308522
申请日：2002-12-03
IPC分类号： G01B9/02
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. A coupled multi-cavity 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.
摘要翻译： 本发明一般涉及一种用于光纤通信系统的光学滤波器。 可以使用耦合的多腔光学滤波器，跟随直接调制的激光源，并将部分频率调制的信号转换成基本幅度调制的信号。 滤光器可以补偿光纤传输介质中的色散，也可以锁定激光源的波长。
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公开(公告)号：US07657179B2
公开(公告)日：2010-02-02
申请号：US11897012
申请日：2007-08-28
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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27.发明申请METHOD AND APPARATUS FOR COMPENSATING FOR FIBER NONLINEARITY IN A TRANSMISSION SYSTEM 有权用于补偿传输系统中光纤非线性的方法和装置公开(公告)号：US20090016740A1
公开(公告)日：2009-01-15
申请号：US12187151
申请日：2008-08-06
IPC分类号： H04B10/00
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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28.发明申请Method and apparatus for generating signals with increased dispersion tolerance using a directly modulated laser transmitter 有权使用直接调制的激光发射器产生具有增加的色散公差的信号的方法和装置公开(公告)号：US20080181619A1
公开(公告)日：2008-07-31
申请号：US12017957
申请日：2008-01-22
IPC分类号： H04B10/04
CPC分类号： H04B10/25137 , H04B10/504
摘要： An optical transmitter is disclosed wherein a modulating signal, such as an NRZ signal, encoding data is combined with a time derivative of the modulating signal and coupled to a directly modulated laser in order to generate artificial transient chirp in the output of the laser effective to substantially compensate for dispersion experienced by the output of the laser traveling through a dispersive medium such as an optical fiber. In some embodiments, the time derivative is added to the modulating signal only at the falling edges of the modulating signal.
摘要翻译： 公开了一种光发射机，其中诸如NRZ信号的编码数据的调制信号与调制信号的时间导数组合并耦合到直接调制的激光器，以便在激光器的输出中产生人为瞬态啁啾， 基本上补偿了通过诸如光纤的分散介质传播的激光器的输出所经历的色散。 在一些实施例中，仅在调制信号的下降沿将时间导数添加到调制信号。
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公开(公告)号：US20080166130A1
公开(公告)日：2008-07-10
申请号：US11897012
申请日：2007-08-28
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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30.发明申请Method and apparatus for transmitting a signal using a chirp managed laser (CML) and an optical spectrum reshaper (OSR) before an optical receiver 有权在光接收机之前使用啁啾管理激光器（CML）和光谱整形器（OSR）发送信号的方法和装置公开(公告)号：US20070147847A1
公开(公告)日：2007-06-28
申请号：US11447662
申请日：2006-06-06
IPC分类号： H04B10/00
CPC分类号： H04B10/675 , H04B10/25137
摘要： A method for transmitting a signal and a fiber optic system comprising: a frequency modulated source; an optical transmission fiber positioned to receive the output of the frequency modulated source; an optical filter positioned to receive the output of the optical transmission fiber; and an optical receiver positioned to receive the output of the optical filter; characterized in that: an optical spectrum reshaper is positioned between the frequency modulated source and the optical transmission fiber; and wherein the optical filter is a narrow band pass filter relative to the bit rate of the transmitted signal; and further wherein the frequency excursion of the frequency modulated source is between 20% and 120% of the bit rate frequency.
摘要翻译： 一种用于发送信号和光纤系统的方法，包括：频率调制源; 定位成接收频率调制源的输出的光传输光纤; 定位成接收光传输光纤的输出的光学滤波器; 以及定位成接收所述滤光器的输出的光接收器; 其特征在于：光谱调制器位于调频源和光传输光纤之间; 并且其中所述滤光器是相对于所发射信号的比特率的窄带通滤波器; 并且其中所述频率调制源的频率偏移在所述比特率频率的20％至120％之间。
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