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98 条记录 (耗时 0.019 秒)

    Optical pulse source for long haul optical communication systems
    63.
    发明授权
    Optical pulse source for long haul optical communication systems 失效
    用于长距离光通信系统的光脉冲源

    公开(公告)号：US06940889B2

    公开(公告)日：2005-09-06

    申请号：US10084788

    申请日：2002-02-26

    申请人： Benjamin John Eggleton ,  Daniel Mahgerefteh ,  Paul Steinvurzel ,  Paul Stephen Westbrook

    发明人： Benjamin John Eggleton ,  Daniel Mahgerefteh ,  Paul Steinvurzel ,  Paul Stephen Westbrook

    IPC分类号： H01S5/024 ,  H01S5/062 ,  H01S5/0687 ,  H04B10/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/155 ,  H01S3/08

    CPC分类号： H04B10/508 ,  H04B10/504 ,  H04B10/572

    摘要： In accordance with the invention, a modulated RZ pulse source comprises a modulated light source optically coupled to a stabilized Bragg grating filter and one or more optical taps. The light source is preferably modulated in power and frequency and has an adjustable channel wavelength λ. The Bragg grating filter has a reflectivity bandwidth having a high slope reflectivity cutoff and is preferably tunable. A feedback arrangement responsive to the taps keeps the source channel wavelength λ on the edge of the reflectivity bandwidth for shaping RZ pulses. When the Bragg grating is stabilized, the feedback system maintains λ at a value linked to the grating reflectivity edge and, by overlapping at least part of the optical spectrum of the source, converts the modulated source light into RZ pulses with high extinction ratio (≧12 dB). The result is a high power, jitter-free RZ pulse source that is compact, inexpensive and power efficient.

    摘要翻译： 根据本发明，调制的RZ脉冲源包括光耦合到稳定的布拉格光栅滤波器和一个或多个光学抽头的调制光源。 光源优选地在功率和频率上进行调制，并具有可调节的通道波长λ。 布拉格光栅滤波器具有高斜率反射截止的反射带宽，并且优选是可调谐的。 响应于抽头的反馈装置将源通道波长λ保持在反射带宽的边缘上，以形成RZ脉冲。 当布拉格光栅稳定时，反馈系统将λ维持在与光栅反射率边缘相关联的值，并且通过重叠光源的至少一部分光谱，将调制的源光转换成具有高消光比的RZ脉冲（> = 12dB）。 结果是高功率，无抖动的RZ脉冲源，紧凑，价格低廉，功率高。

    All-optical regeneration at high bit rates using an electroabsorption modulator
    64.
    发明授权
    All-optical regeneration at high bit rates using an electroabsorption modulator 失效
    使用电吸收调制器以高比特率进行全光学再生

    公开(公告)号：US06335819B1

    公开(公告)日：2002-01-01

    申请号：US09506745

    申请日：2000-02-18

    申请人： Pak S. Cho ,  Julius Goldhar ,  Daniel Mahgerefteh

    发明人： Pak S. Cho ,  Julius Goldhar ,  Daniel Mahgerefteh

    IPC分类号： H01S300

    CPC分类号： H04B10/299

    摘要： The present invention provides simultaneous all-optical regeneration (re-shape and re-amplify) and wavelength conversion using a reverse-biased electroabsorption modulator. The nonlinear optical transmission characteristic of the electroabsorption modulator reshapes the degraded input data by selective absorption of the optical noise and, therefore, increases the signal-to-noise ratio of the output. Reverse biasing the modulator allows fast recovery of the optical absorption for high data-rate operation without the detrimental bit-patterning effect. Error-free wavelength conversion and regeneration at 20 Gb/s was obtained with more than 3-dB improvement of the receiver sensitivity at a bit-error-rate of 10−9. Embodiments and applications of the present invention include an all-optical SEAM regenerator, an all-optical distributed feedback laser SEAM (DFB-SEAM) regenerator, an all-optical SEAM with fiber Bragg grating (SEAM-FBG) regenerator, an all-optical SEAM with polarizing beam splitter (SEAM-PBS) regenerator, an all-optical Mach-Zehnder interferometric (MZI-SEAM) regenerator, an all-optical 3-port MZI-SEAM regenerator, and a SEAM-based optimized receiver.

    摘要翻译： 本发明提供使用反向偏置电吸收调制器的同时全光学再生（重新形成和重新放大）和波长转换。 电吸收调制器的非线性光学传输特性通过选择性吸收光学噪声来重构劣化的输入数据，因此增加了输出的信噪比。 反向偏置调制器允许快速恢复光学吸收，用于高数据速率操作，而不会产生有害的位图案化效果。 获得20 Gb / s的无差错波长转换和再生，以10-9的误码率提高接收机灵敏度的3 dB以上。 本发明的实施例和应用包括全光学SEAM再生器，全光分布反馈激光器SEAM（DFB-SEAM）再生器，具有光纤布拉格光栅（SEAM-FBG）再生器的全光学SEAM，全光学 具有偏振分束器（SEAM-PBS）再生器的SEAM，全光学马赫曾德尔干涉（MZI-SEAM）再生器，全光学3端口MZI-SEAM再生器和基于SEAM的优化接收器。

    THERMAL CHIRP COMPENSATION IN A CHIRP MANAGED LASER
    66.
    发明申请
    THERMAL CHIRP COMPENSATION IN A CHIRP MANAGED LASER 有权
    CHIRP管理激光器中的热线补偿

    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。

    Phase Shift Keyed Modulation of Optical Signal Using Chirp Managed Laser
    67.
    发明申请
    Phase Shift Keyed Modulation of Optical Signal Using Chirp Managed Laser 有权
    使用啁啾管理激光器进行光信号的相移键控调制

    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。

    PASSIVE WAVE DIVISION MULTIPLEXED TRANSMITTER HAVING A DIRECTLY MODULATED LASER ARRAY
    68.
    发明申请
    PASSIVE WAVE DIVISION MULTIPLEXED TRANSMITTER HAVING A DIRECTLY MODULATED LASER ARRAY 有权
    具有直接调制激光阵列的被动波分复用发射机

    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。

    Flat dispersion frequency discriminator (FDFD)
    70.
    发明授权
    Flat dispersion frequency discriminator (FDFD) 有权
    平坦色散鉴频器（FDFD）

    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。