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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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32.发明授权公开(公告)号：US07697186B2
公开(公告)日：2010-04-13
申请号：US11977206
申请日：2007-10-24
CPC分类号： G02B6/4206 , G02B6/14 , G02B6/4215
摘要： An optical system comprising a frequency modulated laser source adapted to produce a frequency modulated optical beam, an optical spectrum reshaper (OSR) adapted to receive the frequency modulated optical beam from the laser source and convert it into an amplitude modulated optical beam, a focusing lens adapted to receive the amplitude modulated optical beam from the OSR and focus the same, and an optical fiber adapted to receive the amplitude modulated optical beam from the focusing lens and transmit an optical signal;characterized in that the OSR has a central axis, the focusing lens has a central axis, and the optical fiber has a central axis, with the central axis of the optical fiber being laterally offset from at least one of the central axis of the OSR and the central axis of the focusing lens so as to effect spatial filtering and thereby generate the desired optical transmission characteristics for the resulting optical signal in the optical fiber.
摘要翻译： 一种光学系统，包括适于产生调频光束的调频激光源，适于从激光源接收频率调制光束并将其转换成幅度调制光束的光谱整形器（OSR），聚焦透镜 适于接收来自OSR的幅度调制光束并对其进行聚焦;以及光纤，适于从聚焦透镜接收调幅光束并发射光信号; 其特征在于，所述OSR具有中心轴，所述聚焦透镜具有中心轴线，并且所述光纤具有中心轴线，所述光纤的中心轴线横向偏离所述OSR的中心轴线中的至少一个， 聚焦透镜的中心轴，从而实现空间滤波，从而产生光纤中产生的光信号所需的光传输特性。
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33.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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35.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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36.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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38.发明申请公开(公告)号：US20080158639A1
公开(公告)日：2008-07-03
申请号：US11977206
申请日：2007-10-24
IPC分类号： G02F1/01
CPC分类号： G02B6/4206 , G02B6/14 , G02B6/4215
摘要： An optical system comprising a frequency modulated laser source adapted to produce a frequency modulated optical beam, an optical spectrum reshaper (OSR) adapted to receive the frequency modulated optical beam from the laser source and convert it into an amplitude modulated optical beam, a focusing lens adapted to receive the amplitude modulated optical beam from the OSR and focus the same, and an optical fiber adapted to receive the amplitude modulated optical beam from the focusing lens and transmit an optical signal;characterized in that the OSR has a central axis, the focusing lens has a central axis, and the optical fiber has a central axis, with the central axis of the optical fiber being laterally offset from at least one of the central axis of the OSR and the central axis of the focusing lens so as to effect spatial filtering and thereby generate the desired optical transmission characteristics for the resulting optical signal in the optical fiber.
摘要翻译： 一种光学系统，包括适于产生调频光束的调频激光源，适于从激光源接收频率调制光束并将其转换成幅度调制光束的光谱整形器（OSR），聚焦透镜 适于接收来自OSR的幅度调制光束并对其进行聚焦;以及光纤，适于从聚焦透镜接收调幅光束并发射光信号; 其特征在于，所述OSR具有中心轴，所述聚焦透镜具有中心轴线，并且所述光纤具有中心轴线，所述光纤的中心轴线横向偏离所述OSR的中心轴线中的至少一个， 聚焦透镜的中心轴，从而实现空间滤波，从而产生光纤中产生的光信号所需的光传输特性。
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公开(公告)号：US06963685B2
公开(公告)日：2005-11-08
申请号：US10289944
申请日：2002-11-06
IPC分类号： G02B5/28 , G02B6/34 , H04B10/155 , H04B10/18
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.
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。 可以使用光滤波器，跟随直接调制的激光源，并将部分调频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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40.发明授权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：US08131157B2
公开(公告)日：2012-03-06
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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