公开(公告)号：US08199785B2

公开(公告)日：2012-06-12

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： H01S3/00 ,  H01S3/04 ,  H04B10/12

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：US07697847B2

公开(公告)日：2010-04-13

申请号：US12061508

申请日：2008-04-02

申请人： Yasuhiro Matsui ,  Xueyan Zheng

发明人： Yasuhiro Matsui ,  Xueyan Zheng

IPC分类号： H04B10/04 ,  H04B10/18

CPC分类号： H04B10/25133

摘要： An optical transmitter is disclosed including an optical signal source generating a frequency modulated signal encoding data. An optical spectrum reshaper is positioned to receive the frequency modulated signal and converts the frequency modulated signal into a reshaped signal having increased amplitude modulation relative to the frequency modulated signal. A third-order dispersive element is positioned to receive the reshaped signal and is adapted to impose third-order dispersion on the reshaped signal to generate a compensated signal having third-order dispersion effective to compensate for second-order dispersion caused by an optical fiber positioned between the optical transmitter and a receiver.

摘要翻译： 公开了一种光发射机，其包括产生调频信号编码数据的光信号源。 定位光谱整形器以接收频率调制信号，并将调频信号转换成相对于频率调制信号具有增加的幅度调制的重构信号。 定位三阶色散元件以接收重整信号并且适于对再成形信号施加三阶色散以产生具有三阶色散的补偿信号，以有效地补偿由定位的光纤引起的二阶色散 在光发射机和接收机之间。

公开(公告)号：US20080240733A1

公开(公告)日：2008-10-02

申请号：US12061508

申请日：2008-04-02

申请人： Yasuhiro Matsui ,  Xueyan Zheng

发明人： Yasuhiro Matsui ,  Xueyan Zheng

IPC分类号： H04B10/30

CPC分类号： H04B10/25133

摘要： An optical transmitter is disclosed including an optical signal source generating a frequency modulated signal encoding data. An optical spectrum reshaper is positioned to receive the frequency modulated signal and converts the frequency modulated signal into a reshaped signal having increased amplitude modulation relative to the frequency modulated signal. A third-order dispersive element is positioned to receive the reshaped signal and is adapted to impose third-order dispersion on the reshaped signal to generate a compensated signal having third-order dispersion effective to compensate for second-order dispersion caused by an optical fiber positioned between the optical transmitter and a receiver.

摘要翻译： 公开了一种光发射机，其包括产生调频信号编码数据的光信号源。 定位光谱整形器以接收频率调制信号，并将调频信号转换成相对于频率调制信号具有增加的幅度调制的重构信号。 定位三阶色散元件以接收重整信号并且适于对再成形信号施加三阶色散以产生具有三阶色散的补偿信号，以有效地补偿由定位的光纤引起的二阶色散 在光发射机和接收机之间。

公开(公告)号：US09624311B2

公开(公告)日：2017-04-18

申请号：US14513855

申请日：2014-10-14

申请人： Kevin Edgar ,  Daiqiang Xu ,  Xueyan Zheng

发明人： Kevin Edgar ,  Daiqiang Xu ,  Xueyan Zheng

IPC分类号： C08B3/24 ,  C08B3/00 ,  C08B3/06 ,  C08J5/18 ,  C08L1/10 ,  C08B3/08 ,  C08B3/16

CPC分类号： C08B3/24 ,  C08B3/00 ,  C08B3/06 ,  C08B3/08 ,  C08B3/16 ,  C08J5/18 ,  C08J2301/10 ,  C08L1/10

摘要： Embodiments of the invention provide regioselectively substituted carbohydrate and polysaccharide derivatives, such as cellulose esters, and methods for preparing them. Particular methods of the invention include deacylation of esters using tetrabutylammonium fluoride to obtain selective substitution at desired hydroxyl position(s) of the ester. Preferred is deacylation of an ester, which shows selectivity for removal of acyl groups from the ester of the secondary alcohols at C-2 and C-3, and which affords cellulose-6-O-esters with high regioselectivity by a simple one-step process employing no protective groups. Inventive regioselectively substituted cellulose esters can be prepared by such methods to obtain esters with the following anhydroglucose repeating units: wherein R1, R2, and R3 are each independently chosen from a hydrogen atom, and, whether substituted or unsubstituted, branched or unbranched, an alkanoyl group, an aroyl group, and a heteroaroyl group. In embodiments, the alkanoyl, aroyl and heteroaroyl groups can comprise from 1-20 carbon atoms.

公开(公告)号：US08411351B2

公开(公告)日：2013-04-02

申请号：US13534276

申请日：2012-06-27

申请人： Kevin McCallion ,  Xueyan Zheng

发明人： Kevin McCallion ,  Xueyan Zheng

IPC分类号： G02F2/00 ,  G02F1/35

CPC分类号： H04L27/223 ,  G02F2/00 ,  H04B10/677 ,  H04L27/2071

摘要： A phase-shift keyed signal demodulator and method for demodulating is disclosed. An example demodulator includes N filters that receive inputs from a splitter and include transmission functions offset from one another. N pairs of photodiodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.

摘要翻译： 公开了一种用于解调的相移键控信号解调器和方法。 示例解调器包括N个滤波器，其接收来自分路器的输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换成一个或多个数据符号。

公开(公告)号：US20150038695A1

公开(公告)日：2015-02-05

申请号：US14513855

申请日：2014-10-14

申请人： Kevin Edgar ,  Daiqiang Xu ,  Xueyan Zheng

发明人： Kevin Edgar ,  Daiqiang Xu ,  Xueyan Zheng

IPC分类号： C08B3/24

CPC分类号： C08B3/24 ,  C08B3/00 ,  C08B3/06 ,  C08B3/08 ,  C08B3/16 ,  C08J5/18 ,  C08J2301/10 ,  C08L1/10

摘要： Embodiments of the invention provide regioselectively substituted carbohydrate and polysaccharide derivatives, such as cellulose esters, and methods for preparing them. Particular methods of the invention include deacylation of esters using tetrabutylammonium fluoride to obtain selective substitution at desired hydroxyl position(s) of the ester. Preferred is deacylation of an ester, which shows selectivity for removal of acyl groups from the ester of the secondary alcohols at C-2 and C-3, and which affords cellulose-6-O-esters with high regioselectivity by a simple one-step process employing no protective groups. Inventive regioselectively substituted cellulose esters can be prepared by such methods to obtain esters with the following anhydroglucose repeating units: wherein R1, R2, and R3 are each independently chosen from a hydrogen atom, and, whether substituted or unsubstituted, branched or unbranched, an alkanoyl group, an aroyl group, and a heteroaroyl group. In embodiments, the alkanoyl, aroyl and heteroaroyl groups can comprise from 1-20 carbon atoms.

摘要翻译： 本发明的实施方案提供区域选择性取代的碳水化合物和多糖衍生物，例如纤维素酯，以及制备它们的方法。 本发明的具体方法包括使用四丁基氟化铵去酯化酯以在酯的所需羟基位置获得选择性取代。 优选的是酯的脱酰基，其表现出在C-2和C-3上从仲醇的酯中除去酰基的选择性，并且通过简单的一步提供具有高区域选择性的纤维素-6-O-酯 不使用保护基的方法。 本发明的区域选择性纤维素酯可以通过这样的方法制备得到具有以下脱水葡萄糖重复单元的酯：其中R 1，R 2和R 3各自独立地选自氢原子，以及无论取代或未取代的支链或非支链烷酰基 基团，芳酰基和杂芳酰基。 在实施方案中，烷酰基，芳酰基和杂芳酰基可以包含1-20个碳原子。

公开(公告)号：US20110170171A1

公开(公告)日：2011-07-14

申请号：US12687570

申请日：2010-01-14

申请人： Kevin McCallion ,  Xueyan Zheng

发明人： Kevin McCallion ,  Xueyan Zheng

IPC分类号： G02F2/00

CPC分类号： H04L27/223 ,  G02F2/00 ,  H04B10/677 ,  H04L27/2071

摘要： A phase-shift keyed signal demodulator is disclosed including a filter positioned to receive an input beam, a first photodiode positioned to receive light reflected from the filter, and a second photodiode positioned to receive light transmitted through the filter. A difference between outputs of the first and second photodiodes is interpreted to determine a data value encoded in the input beam. In another embodiment N filters receive inputs from a splitter and include transmission functions offset from one another. N pairs of photo diodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.

摘要翻译： 公开了一种相移键控信号解调器，其包括定位成接收输入光束的滤光器，定位成接收从滤光器反射的光的第一光电二极管和定位成接收透过滤光器的光的第二光电二极管。 解释第一和第二光电二极管的输出之间的差异，以确定在输入光束中编码的数据值。 在另一个实施例中，N个滤波器从分离器接收输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换为一个或多个数据符号。

公开(公告)号：US20130094797A1

公开(公告)日：2013-04-18

申请号：US13272261

申请日：2011-10-13

申请人： Xueyan Zheng ,  Kevin McCallion ,  Michael Deutsch

发明人： Xueyan Zheng ,  Kevin McCallion ,  Michael Deutsch

IPC分类号： G02F1/035

CPC分类号： G02F1/225 ,  G02F1/2257 ,  H04B10/5053

摘要： An optical transmitter with chirp control includes an input polarizer having an input that receives an optical signal. The input polarizer polarizes the optical signal along an input polarization axis. A Mach-Zehnder modulator includes an optical input that is coupled to an output of the input polarizer and an electrical input that receives a modulation signal. The Mach-Zehnder modulator modulates the optical signal with the modulation signal. The input polarization axis of the input polarizer is chosen to achieve a desired chirp of the modulated optical signal. An output polarizer is coupled to the output of the Mach-Zehnder modulator. The output polarizer polarizes the modulated optical signal along a desired output polarization axis that combines TE and TM mode polarizations.

摘要翻译： 具有啁啾控制的光发射机包括具有接收光信号的输入的输入偏振器。 输入偏振器沿着输入偏振轴偏振光信号。 马赫 - 曾德调制器包括耦合到输入偏振器的输出的光输入端和接收调制信号的电输入端。 Mach-Zehnder调制器用调制信号调制光信号。 选择输入偏振器的输入偏振轴以实现调制光信号的期望啁啾。 输出偏振器耦合到马赫 - 曾德尔调制器的输出。 输出偏振器使调制的光信号沿着组合TE和TM模极化的期望的输出偏振轴偏振。

公开(公告)号：US08379295B2

公开(公告)日：2013-02-19

申请号：US12687570

申请日：2010-01-14

申请人： Xueyan Zheng ,  Kevin McCallion

发明人： Xueyan Zheng ,  Kevin McCallion

IPC分类号： G02F2/00 ,  G02F1/35

CPC分类号： H04L27/223 ,  G02F2/00 ,  H04B10/677 ,  H04L27/2071

摘要： A phase-shift keyed signal demodulator is disclosed including a filter positioned to receive an input beam, a first photodiode positioned to receive light reflected from the filter, and a second photodiode positioned to receive light transmitted through the filter. A difference between outputs of the first and second photodiodes is interpreted to determine a data value encoded in the input beam. In another embodiment N filters receive inputs from a splitter and include transmission functions offset from one another. N pairs of photo diodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.

摘要翻译： 公开了一种相移键控信号解调器，其包括定位成接收输入光束的滤光器，定位成接收从滤光器反射的光的第一光电二极管和定位成接收透过滤光器的光的第二光电二极管。 解释第一和第二光电二极管的输出之间的差异，以确定在输入光束中编码的数据值。 在另一个实施例中，N个滤波器从分离器接收输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换为一个或多个数据符号。

公开(公告)号：US20120269523A1

公开(公告)日：2012-10-25

申请号：US13534276

申请日：2012-06-27

申请人： Kevin McCallion ,  Xueyan Zheng

发明人： Kevin McCallion ,  Xueyan Zheng

IPC分类号： H04B10/06

CPC分类号： H04L27/223 ,  G02F2/00 ,  H04B10/677 ,  H04L27/2071

摘要： A phase-shift keyed signal demodulator and method for demodulating is disclosed. An example demodulator includes N filters that receive inputs from a splitter and include transmission functions offset from one another. N pairs of photodiodes receive the transmitted and reflected beams from each filter and a decoder converts the outputs of the pairs of photodiodes to one or more data symbols.

摘要翻译： 公开了一种用于解调的相移键控信号解调器和方法。 示例解调器包括N个滤波器，其接收来自分路器的输入并且包括彼此偏移的传输函数。 N对光电二极管接收来自每个滤波器的发送和反射光束，并且解码器将该对光电二极管的输出转换成一个或多个数据符号。