公开(公告)号：US6081323A

公开(公告)日：2000-06-27

申请号：US26429

申请日：1998-02-19

申请人： Daniel Mahgerefteh ,  Julius Goldhar ,  Douglas Llewellyn Butler ,  Lance Gregory Joneckis

发明人： Daniel Mahgerefteh ,  Julius Goldhar ,  Douglas Llewellyn Butler ,  Lance Gregory Joneckis

IPC分类号： G01N21/65 ,  G01N21/00

CPC分类号： H04B10/0731 ,  H04B10/2916

摘要： An apparatus and method for measuring the spectral dependence of the Raman gain coefficient in optical fibers is presented. This approach measures the power level of Raman scattering in both a walk-off limited region and a physical fiber length limited region and, from these measurements, extracts the spectral dependence of the Raman gain coefficient. Access to these two regions is accomplished through control of the excitation pulse temporal width and relies on fiber dispersion to separate the excitation light from the Raman scattered light for short pulse widths. This approach measures the spectral dependence of the Raman gain without the necessity of absolute power measurement of the Raman scattered light, the need for a reference standard, or the need of a frequency tunable secondary optical source.

摘要翻译： 提出了一种用于测量光纤中拉曼增益系数的频谱依赖性的装置和方法。 这种方法测量了离散限制区域和物理光纤长度限制区域中拉曼散射的功率水平，并从这些测量中提取拉曼增益系数的光谱依赖性。 通过控制激发脉冲时间宽度来实现对这两个区域的访问，并且依赖于光纤色散以将激发光与来自拉曼散射光的脉冲宽度分开。 该方法测量拉曼增益的频谱依赖性，而不需要对拉曼散射光进行绝对功率测量，需要参考标准，或需要频率可调谐的次级光源。

公开(公告)号：US07962045B2

公开(公告)日：2011-06-14

申请号：US11964315

申请日：2007-12-26

申请人： Kevin John McCallion ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

发明人： Kevin John McCallion ,  Yasuhiro Matsui ,  Daniel Mahgerefteh

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H01S5/142 ,  G02B6/12007 ,  H01S5/02248 ,  H01S5/02415 ,  H01S5/02446 ,  H01S5/02453 ,  H01S5/02476 ,  H01S5/026 ,  H01S5/06256 ,  H01S5/1032 ,  H01S5/1209 ,  H01S5/1212

摘要： An optical transmitter is disclosed including a widely tunable laser coupled to a periodic optical spectrum reshaper (OSR) to convert frequency modulated pulses from the laser into amplitude modulated pulses. The laser is tuned to generate pulses corresponding to passbands of the OSR spanning a wide range of frequencies. The laser includes a gain section having an optical path length substantially shorter than the total optical path length of the laser. The laser may be a Y-branch laser having reverse-biased sampled gratings or ring resonator filters tuned by stripe heaters. The laser may also include a reflective external cavity section tunable by modulating the temperature of ring resonators or etalons. The OSR may be integrally formed with the external cavity of the ECL laser.

摘要翻译： 公开了一种光发射机，其包括耦合到周期性光谱整形器（OSR）的广泛可调激光器，以将来自激光器的调频脉冲转换成幅度调制脉冲。 激光器被调谐以产生对应于跨越宽范围频率的OSR的通带的脉冲。 该激光器包括增益部分，该增益部分的光程长度远大于激光器的总光程长度。 激光器可以是具有由条形加热器调谐的反向偏置采样光栅或环形谐振器滤波器的Y分支激光器。 激光器还可以包括可通过调制环形谐振器或标准具的温度来调节的反射外部空腔部分。 OSR可以与ECL激光器的外部腔体一体形成。

公开(公告)号：US20100329666A1

公开(公告)日：2010-12-30

申请号：US12495460

申请日：2009-06-30

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： H04B10/00

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 method for thermal chirp compensation in a chirp managed laser (CML) includes several acts. First, a first bias condition and temperature is selected. Next, a first thermal chirp compensation signal is generated. Then, the laser is driven by biasing a first input drive signal with the first thermal chirp compensation signal. Next, a second bias condition and temperature is selected. Then, a second thermal chirp compensation signal is generated. Finally, the laser is driven by biasing a second input drive signal with the second thermal chirp compensation signal.

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，在线性调频管理激光器（CML）中用于热啁啾补偿的方法包括若干动作。 首先，选择第一偏置条件和温度。 接下来，产生第一热啁啾补偿信号。 然后，通过利用第一热啁啾补偿信号偏置第一输入驱动信号来驱动激光器。 接下来，选择第二偏置条件和温度。 然后，产生第二热啁啾补偿信号。 最后，通过利用第二热啁啾补偿信号偏置第二输入驱动信号来驱动激光器。

公开(公告)号：US20100008679A1

公开(公告)日：2010-01-14

申请号：US12171201

申请日：2008-07-10

申请人： Christopher R. Cole ,  Daniel Mahgerefteh ,  The'Linh Nguyen ,  Andrew C. Singer ,  Naresh Ramnath Shanbhag

发明人： Christopher R. Cole ,  Daniel Mahgerefteh ,  The'Linh Nguyen ,  Andrew C. Singer ,  Naresh Ramnath Shanbhag

IPC分类号： H04B10/12

CPC分类号： H04B10/58 ,  H04B10/40 ,  H04B10/532 ,  H04B10/5561 ,  H04B10/69

摘要： A high-speed optical transmitter comprises multiple digital lanes that are provided to a bank of digital-to-analog converters. The analog signals are then used to Phase Shift Keyed (PSK) modulation using a Chirp Managed Laser (CML)-based transmitter, and potentially using dual polarization. A corresponding optical receiver receives the sequence of optical signals at a demodulator. For each polarization, the demodulator includes a corresponding demodulation channel that is configured to demodulate that polarization component of the optical signal into one or more signal components. Each of these signal components is converted into a corresponding digital signal using a corresponding analog-to-digital converter. In the case of higher-order PSK modulation (e.g., 8PSK or higher), for each polarization, the analog converter has a lower sampling rate than for QPSK modulation.

摘要翻译： 高速光发射机包括提供给数模转换器组的多个数字通道。 然后使用基于啁啾管理激光（CML）的发射机将模拟信号用于相移键控（PSK）调制，并可能使用双极化。 相应的光接收机在解调器处接收光信号序列。 对于每个极化，解调器包括相应的解调信道，其被配置为将该光信号的偏振分量解调为一个或多个信号分量。 这些信号分量中的每一个都使用对应的模拟 - 数字转换器转换成相应的数字信号。 在高阶PSK调制（例如，8PSK或更高）的情况下，对于每个极化，模拟转换器具有比对QPSK调制低的采样率。

公开(公告)号：US20090269069A1

公开(公告)日：2009-10-29

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： H04J14/02 ,  H04B10/04 ,  H04B10/12

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。 多路复用器通过其端口具有传输峰值，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：US07492976B2

公开(公告)日：2009-02-17

申请号：US11441944

申请日：2006-05-26

申请人： Daniel Mahgerefteh ,  Duncan John William Walker ,  Roeland Nuyts

发明人： Daniel Mahgerefteh ,  Duncan John William Walker ,  Roeland Nuyts

IPC分类号： G02F1/295

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.

摘要翻译： 本发明提供一种平坦色散频率鉴别器（FDFD），其能够具有沿着鉴别器的光谱区域的正或负色散的基本平坦色散。 这样一来，根据激光输出相对于滤波器传输的相对频谱对准，FDFD可能不会引起其输出的强度图形的实质性失真，以使由于强度图案的过冲或下冲引起的发生失真最小化。

公开(公告)号：US20080031636A1

公开(公告)日：2008-02-07

申请号：US11784411

申请日：2007-04-06

申请人： Yasuhiro Matsui ,  Daniel Mahgerefteh

发明人： Yasuhiro Matsui ,  Daniel Mahgerefteh

IPC分类号： H04B10/04 ,  H04B10/12

CPC分类号： H04B10/516 ,  H04B10/504 ,  H04B10/5561 ,  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 frequency excursion of the first signal is adjusted such that the frequency excursion is substantially equal to the ratio of the bit period of the digital base signal to total dispersion of the transmission fiber, whereby to increase the tolerance of the second signal to dispersion in a transmission fiber.

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：调节第一信号的频率偏移，使得频率偏移基本上等于数字基本信号的位周期与传输光纤的总色散的比率，由此增加第二信号的容差 以分散在传输光纤中。

公开(公告)号：US5974209A

公开(公告)日：1999-10-26

申请号：US69714

申请日：1998-04-30

申请人： Pak Shing Cho ,  Daniel Mahgerefteh

发明人： Pak Shing Cho ,  Daniel Mahgerefteh

IPC分类号： H04B10/18 ,  G02B6/26

CPC分类号： H04B10/2507

摘要： Optical signal produced by a semiconductor electroabsorption modulator is passed through an optical discriminator to increase the optical and electrical modulation response of the device and decrease the output chirp for distortionless transmission through dispersive optical fiber.

摘要翻译： 由半导体电吸收调制器产生的光信号通过光鉴别器，以增加器件的光电调制响应和减少输出啁啾，使其通过色散光纤进行无失真传输。

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：US08204386B2

公开(公告)日：2012-06-19

申请号：US12126717

申请日：2008-05-23

申请人： Daniel Mahgerefteh ,  Kevin J. McCallion ,  The'Linh Nguyen ,  David Allouche

发明人： Daniel Mahgerefteh ,  Kevin J. McCallion ,  The'Linh Nguyen ,  David Allouche

IPC分类号： H04B10/04 ,  H01S3/10

CPC分类号： H04B10/532 ,  H04B10/5162 ,  H04B10/5561

摘要： Apparatus and methods for driving a transmitter to generate DNPSK signals is disclosed including generating N data streams comprising data symbols and for each of a plurality of sets of N simultaneous data symbols of the N data streams, imposing signals are on L of a plurality of signal lines, with the value of L corresponding to values of the N simultaneous data symbols. Signals on the plurality of signal lines are ANDed with a clock signal synchronized with the N data streams to produce RZ signals. The RZ signals are summed and the summed signal is input to a laser that produces an output having frequency modulation corresponding to the magnitude of the summed signal. The output of the laser is passed through an optical discriminator.

摘要翻译： 公开了用于驱动发射机以产生DNPSK信号的装置和方法，包括产生包括数据符号的N个数据流，以及针对N个数据流的多个N个同时数据符号组中的每一个，施加信号在多个信号的L上 线，其值L对应于N个同时数据符号的值。 多个信号线上的信号与与N个数据流同步的时钟信号“与”，以产生RZ信号。 将RZ信号相加，并将求和的信号输入到产生具有对应于求和信号的幅度的频率调制的输出的激光器。 激光器的输出通过光学鉴别器。