公开(公告)号：US08027593B2

公开(公告)日：2011-09-27

申请号：US12028678

申请日：2008-02-08

申请人： Jianying Zhou ,  Xueyan Zheng ,  Kevin J. McCallion ,  Daniel Mahgerefteh ,  Hongmin Chen ,  Guoxi Sun ,  Parviz Tayebati

发明人： Jianying Zhou ,  Xueyan Zheng ,  Kevin J. McCallion ,  Daniel Mahgerefteh ,  Hongmin Chen ,  Guoxi Sun ,  Parviz Tayebati

IPC分类号： H04B10/12

CPC分类号： H04B10/504 ,  H04B10/58

摘要： The frequency chirp modulation response of a directly modulated laser is described using a small signal model that depends on slow chirp amplitude s and slow chirp time constant τs. The small signal model can be used to derive an inverse response for designing slow chirp compensation means. Slow chirp compensation means include electrical compensation, optical compensation, or both. Slow chirp electrical compensation can be implemented with an LR filter or other RF circuit coupled to a direct modulation source (e.g., a laser driver) and the directly modulated laser. Slow chirp optical compensation can be implemented with an optical spectrum reshaper having a rounded top and relatively large slope (e.g., 1.5-3 dB/GHz). The inverse response can be designed to under-compensate, to produce a flat response, or to over-compensate.

摘要翻译： 使用取决于慢啁啾振幅s和慢啁啾时间常数τs的小信号模型来描述直接调制激光器的频率啁啾调制响应。 小信号模型可用于导出用于设计慢啁啾补偿装置的反向响应。 慢啁啾补偿装置包括电补偿，光学补偿或两者。 可以使用耦合到直接调制源（例如，激光驱动器）和直接调制的激光器的LR滤波器或其它RF电路来实现慢啁啾电补偿。 可以用具有圆顶和较大斜率（例如，1.5-3dB / GHz）的光谱整形器实现慢啁啾光学补偿。 反向响应可以设计为欠补偿，产生平坦响应或过度补偿。

公开(公告)号：US07061610B2

公开(公告)日：2006-06-13

申请号：US10366953

申请日：2003-02-14

申请人： Michael Mittelstein ,  Hongmin Chen

发明人： Michael Mittelstein ,  Hongmin Chen

IPC分类号： G01J3/28 ,  G02B6/34

CPC分类号： G02B6/12019

摘要： A method and device for measuring the wavelength of a source, for example monitoring a laser used in DWDM fiber optic communications systems, wherein the method and device comprise using a coarse arrayed waveguide grating (AWG) to resolve an ambiguity of wavelength measurement in a fine arrayed waveguide grating. The wavelength monitor or meter of the present invention may be configured as a standalone device suitable for use in many different applications and may also be integrated into a laser or laser array for use in DWDM fiber optic communications systems.

摘要翻译： 一种用于测量源的波长的方法和装置，例如监测在DWDM光纤通信系统中使用的激光，其中该方法和装置包括使用粗阵列波导光栅（AWG）来分辨波长测量的模糊性 阵列波导光栅。 本发明的波长监视器或仪表可以被配置为适用于许多不同应用的独立设备，并且还可以被集成到用于DWDM光纤通信系统中的激光器或激光器阵列中。

公开(公告)号：US07031354B2

公开(公告)日：2006-04-18

申请号：US10776809

申请日：2004-02-11

申请人： Hsing Cheng ,  Hongmin Chen ,  Hamid R. Khazaei

发明人： Hsing Cheng ,  Hongmin Chen ,  Hamid R. Khazaei

IPC分类号： H01S3/13

CPC分类号： H01S5/4025 ,  H01S5/0652 ,  H01S5/141 ,  H01S5/4062 ,  H01S5/4068 ,  H01S5/4087

摘要： In a stabilized laser system, an output of a desired wavelength is generated. Each of a plurality of n lasers, which, while emitting light and having a preselected portion thereof fed back thereto, causes the fed back portion to be amplified and shifted in wavelength in a first direction which is spaced apart from the center wavelength of the feedback signal. A feedback stabilization arrangement is coupled to output ports of the plurality of n lasers for generating a feedback signal having a wavelength spectrum peaking at a wavelength shifted in an opposite direction to the first direction generated by the lasers in response to the feedback signal so as to provide an output signal at the output of the stabilized laser system having a wavelength spectrum that peaks essentially at the desired wavelength. A reflector is located at a predetermined signal round-trip time delay distance from the feedback stabilization arrangement. The reflector receives the output signal from the feedback stabilization arrangement and passes a first portion thereof therethrough, and reflects a remaining second portion back to the feedback stabilization arrangement as a secondary feedback signal that contributes to each of the plurality of n laser sources being set in a stable coherence collapse mode.

摘要翻译： 在稳定的激光系统中，产生期望波长的输出。 多个n个激光器中的每一个在发射光并将其预选部分反馈到其中的同时使得反馈部分在与反馈的中心波长间隔开的第一方向上被放大和偏移波长 信号。 反馈稳定装置耦合到多个n个激光器的输出端口，用于产生反馈信号，该反馈信号具有波长频谱，该波长谱响应于反馈信号而以与由激光器产生的第一方向相反的方向偏移波长， 在稳定的激光系统的输出处提供输出信号，其具有基本上在所需波长处达到峰值的波长谱。 反射器位于距离反馈稳定装置的预定信号往返时间延迟距离处。 反射器从反馈稳定装置接收输出信号，并使其第一部分通过其中，并将剩余的第二部分反射回反馈稳定装置作为次级反馈信号，该次级反馈信号有助于将多个n个激光源中的每一个设置在 稳定的一致性崩溃模式。

公开(公告)号：US06975797B2

公开(公告)日：2005-12-13

申请号：US10776810

申请日：2004-02-11

申请人： Hongmin Chen ,  Hamid R. Khazaei

发明人： Hongmin Chen ,  Hamid R. Khazaei

IPC分类号： G02B6/34 ,  G02B6/26 ,  G02B6/28

CPC分类号： G02B6/29338

摘要： A basic reflector arrangement has first and second power splitters. Each power splitter has first to fourth ports where the first port of the first power splitter is coupled to a remote signal source for receiving signals therefrom and providing feedback signals thereto. Signals received at each of the first and fourth ports of each power splitter are combined and split into first and second portions for transmission via the second and third ports, respectively, and signals received at the second and third ports are combined and split into first and second portions for transmission via the first and fourth ports, respectively. The second port of the second power splitter is coupled to provide an output signal from the reflector arrangement, and the first, third, and fourth ports thereof are coupled to the second, third, and fourth ports, respectively, of the first power splitter.

摘要翻译： 基本的反射器装置具有第一和第二功率分配器。 每个功率分配器具有第一至第四端口，其中第一功率分配器的第一端口耦合到远程信号源，用于从其接收信号并向其提供反馈信号。 在每个功率分配器的每个第一和第四端口处接收的信号被组合并分成第一和第二部分，以分别经由第二和第三端口传输，并且在第二和第三端口处接收的信号被组合并分为第一和第二端口 第二部分分别经由第一和第四端口传输。 第二功率分配器的第二端口被耦合以提供来自反射器装置的输出信号，并且其第一，第三和第四端口分别耦合到第一功率分配器的第二，第三和第四端口。

公开(公告)号：US20050175046A1

公开(公告)日：2005-08-11

申请号：US10776808

申请日：2004-02-11

申请人： Hamid Khazaei ,  Hongmin Chen ,  David Lewis ,  Hsing Cheng

发明人： Hamid Khazaei ,  Hongmin Chen ,  David Lewis ,  Hsing Cheng

IPC分类号： H01S3/13 ,  H01S5/00 ,  H01S5/0687 ,  H01S5/14 ,  H01S5/40

CPC分类号： H01S5/0687 ,  H01S5/005 ,  H01S5/141 ,  H01S5/4062 ,  H01S5/4068 ,  H01S5/4087

摘要： In a stabilized laser system, a signal is to be generated at an output thereof having a desired central wavelength. At least one laser, which, while emitting light and having a preselected portion thereof fed back thereto, causes the output signal of the at least one laser source to be shifted in wavelength in a first direction which is spaced apart from the center wavelength of the fed back signal. A feedback generating arrangement is coupled to the at least one laser to process a first portion of the output signal from the at least one laser and generate a feedback signal having a spectral response peaking at a wavelength shifted in an opposite direction to the first direction generated by at least one laser. The feedback signal that is shifted in the opposite direction causes the at least one laser to provide an output signal at the output of the stabilized laser system having a spectral response that peaks essentially at the desired wavelength.

摘要翻译： 在稳定的激光系统中，将在其具有期望中心波长的输出端产生信号。 至少一个激光器，其在发光并将其预选部分反馈到其中的同时使得至少一个激光源的输出信号在与第一个激光源的中心波长间隔开的第一方向上以波长移动 反馈信号。 反馈产生装置被耦合到所述至少一个激光器以处理来自所述至少一个激光器的输出信号的第一部分，并产生具有在与所产生的第一方向相反的方向上偏移波长的光谱响应峰值的反馈信号 通过至少一个激光。 在相反方向上移位的反馈信号使得至少一个激光器在稳定的激光系统的输出处提供输出信号，该输出信号具有基本上在所需波长处达到峰值的光谱响应。

公开(公告)号：US08260150B2

公开(公告)日：2012-09-04

申请号：US12110071

申请日：2008-04-25

申请人： Daniel Mahgerefteh ,  Hongmin Chen ,  Bernd Huebner

发明人： Daniel Mahgerefteh ,  Hongmin Chen ,  Bernd Huebner

IPC分类号： H04B10/04

CPC分类号： H04B10/504 ,  G02B6/29343 ,  G02B6/29355 ,  H04B10/54 ,  H04B10/548

摘要： An wave division multiplexed (WDM) optical transmitter is disclosed including a directly modulated laser array and a planar lightwave chip (PLC) having a plurality of OSRs that receive outputs of the laser array and increase the extinction ratio of the received light. An optical multiplexer receives the outputs of the OSRs and couples them to a single output port. The multiplexer has transmission peaks through its ports each having a 0.5 dB bandwidth including the frequency of a laser in the array. The optical multiplexer may be embodied as cascaded Mach-Zehnder interferometers or ring resonators.

摘要翻译： 公开了一种波分复用（WDM）光发射机，其包括直接调制的激光阵列和具有接收激光器阵列的输出并增加接收光的消光比的多个OSR的平面光波片（PLC）。 光复用器接收OSR的输出并将它们耦合到单个输出端口。 多路复用器具有通过其端口的传输峰值，每个端口具有包括阵列中的激光器的频率的0.5dB带宽。 光复用器可以被实现为级联的马赫 - 曾德干涉仪或环形谐振器。

公开(公告)号：US07869473B2

公开(公告)日：2011-01-11

申请号：US12053344

申请日：2008-03-21

申请人： Xiong Ye ,  Hongmin Chen ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

发明人： Xiong Ye ,  Hongmin Chen ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

IPC分类号： H01S3/10

CPC分类号： H01S5/06256 ,  H01S5/0427 ,  H01S5/06251

摘要： A DBR laser, such as a semiconductor DBR laser is disclosed having improved frequency modulation performance. The laser includes a split gain electrode and a tuning electrode. A modulating current encoding a data signal is injected into a first section of the gain electrode whereas a substantially DC bias voltage is imposed on a second section of the gain electrode positioned between the first gain electrode and the tuning electrode. The first and second gain electrodes are electrically isolated from each other and the tuning electrode by a large isolation resistance. In some embodiments, the isolation resistance is generated by forming the electrodes on a P+ layer and removing portions of the P+ layer between adjacent electrodes. Capacitors may couple to one or both of the second gain electrode and the tuning electrode.

摘要翻译： 公开了一种具有改进的频率调制性能的DBR激光器，例如半导体DBR激光器。 激光器包括分裂增益电极和调谐电极。 将编码数据信号的调制电流注入增益电极的第一部分，而将大体上的直流偏置电压施加在位于第一增益电极和调谐电极之间的增益电极的第二部分上。 第一和第二增益电极通过大的隔离电阻彼此电隔离和调谐电极。 在一些实施例中，通过在P +层上形成电极并去除相邻电极之间的P +层的部分来产生隔离电阻。 电容器可以耦合到第二增益电极和调谐电极中的一个或两个。

公开(公告)号：US20090268765A1

公开(公告)日：2009-10-29

申请号：US12110572

申请日：2008-04-28

申请人： Daniel Mahgerefteh ,  Hongmin Chen ,  Yasuhiro Matsui

发明人： Daniel Mahgerefteh ,  Hongmin Chen ,  Yasuhiro Matsui

IPC分类号： H01S5/06

CPC分类号： H01S5/0265 ,  H01S5/06246

摘要： Use of depletion edge translation as an in cavity phase modulation mechanism in lasers. Aspects of the invention are especially relevant (without limitation) in transmitters for extended reach comprising an intra cavity phase and amplitude modulated laser for generation of a frequency modulated signal and a passive optical spectrum reshaper element, sometimes referred to as a chirp modulated laser. Such techniques may be carried out as disclose herein by adopting predetermined doping profiles and applying predetermined voltage to the laser cavity, and more preferably to a phase section in or adjoining the laser cavity.

摘要翻译： 使用耗尽边缘平移作为激光器中的空腔相位调制机制。 本发明的各个方面在用于扩展到达的发射机中尤为重要（但不限于）包括用于产生频率调制信号的腔内相位和幅度调制激光器以及有时被称为啁啾调制激光器的无源光谱再生元件。 这样的技术可以如本文所公开的那样通过采用预定的掺杂分布和向激光器腔施加预定的电压，更优选地应用于激光腔中或邻近激光腔的相位部分来执行。

公开(公告)号：US20050175288A1

公开(公告)日：2005-08-11

申请号：US10776810

申请日：2004-02-11

申请人： Hongmin Chen ,  Hamid Khazaei

发明人： Hongmin Chen ,  Hamid Khazaei

IPC分类号： G02B6/34 ,  G02B6/26 ,  G02B6/28

CPC分类号： G02B6/29338

摘要： A basic reflector arrangement has first and second power splitters. The first power splitter has first, second, third, and fourth ports where the first port is coupled to a remote signal source for receiving signals therefrom and providing feedback signals thereto. Signals received at each of the first and fourth ports are combined and split into first and second portions for transmission via the second and third ports, respectively, and signals received at the second and third ports are combined and split into first and second portions for transmission via the first and fourth ports, respectively. The second power splitter has first, second, third, and fourth ports, where the second port is coupled to provide an output signal from the reflector arrangement, and the first, third, and fourth ports are coupled to the second, third, and fourth ports, respectively, of the at least one first power splitter. Various components such as transmission filters, filter/multiplexers, and delay lines can be added in paths coupling the first and second power splitters for processing the reflector output and feedback signals.

摘要翻译： 基本的反射器装置具有第一和第二功率分配器。 第一功率分配器具有第一，第二，第三和第四端口，其中第一端口耦合到远程信号源以从其接收信号并向其提供反馈信号。 在第一和第四端口中的每一个处接收到的信号被组合并分成第一和第二部分，用于经由第二和第三端口传输，并且将在第二和第三端口处接收的信号组合并分离成第一和第二部分用于传输 分别经由第一和第四端口。 第二功率分配器具有第一，第二，第三和第四端口，其中第二端口被耦合以提供来自反射器装置的输出信号，并且第一，第三和第四端口耦合到第二，第三和第四端口 分别为至少一个第一功率分配器的端口。 可以在耦合第一和第二功率分配器的路径中添加诸如传输滤波器，滤波器/多路复用器和延迟线的各种组件，以处理反射器输出和反馈信号。

公开(公告)号：US20090238224A1

公开(公告)日：2009-09-24

申请号：US12053344

申请日：2008-03-21

申请人： Xiong Ye ,  Hongmin Chen ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

发明人： Xiong Ye ,  Hongmin Chen ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

IPC分类号： H01S3/10

CPC分类号： H01S5/06256 ,  H01S5/0427 ,  H01S5/06251

摘要： A DBR laser, such as a semiconductor DBR laser is disclosed having improved frequency modulation performance. The laser includes a split gain electrode and a tuning electrode. A modulating current encoding a data signal is injected into a first section of the gain electrode whereas a substantially DC bias voltage is imposed on a second section of the gain electrode positioned between the first gain electrode and the tuning electrode. The first and second gain electrodes are electrically isolated from each other and the tuning electrode by a large isolation resistance. In some embodiments, the isolation resistance is generated by forming the electrodes on a P+ layer and removing portions of the P+ layer between adjacent electrodes. Capacitors may couple to one or both of the second gain electrode and the tuning electrode.

摘要翻译： 公开了一种具有改进的频率调制性能的DBR激光器，例如半导体DBR激光器。 激光器包括分裂增益电极和调谐电极。 将编码数据信号的调制电流注入增益电极的第一部分，而将大体上的直流偏置电压施加在位于第一增益电极和调谐电极之间的增益电极的第二部分上。 第一和第二增益电极通过大的隔离电阻彼此电隔离和调谐电极。 在一些实施例中，通过在P +层上形成电极并去除相邻电极之间的P +层的部分来产生隔离电阻。 电容器可以耦合到第二增益电极和调谐电极中的一个或两个。