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1. 发明授权

US10211922B2 Burst mode node 有权
公开(公告)号：US10211922B2
公开(公告)日：2019-02-19
申请号：US15431113
申请日：2017-02-13
申请人： Venkatesh G. Mutalik , Marcel F. Schemmann , John Ulm , Zoran Maricevic
发明人： Venkatesh G. Mutalik , Marcel F. Schemmann , John Ulm , Zoran Maricevic
IPC分类号： H04B10/2575 , H04N7/22 , H04Q11/00 , H04L12/28 , H04H20/69 , H04H20/78
摘要： Systems and Methods for reducing distortion due to bursts of upstream transmission in an HFC CATV network. In some preferred systems, the functionality of an Optical Network Unit (ONU) may occur within a node or amplifier along a direction upstream from a subscriber's home.

2. 发明授权

US09065964B1 Reducing four wave mixing ingress 有权
标题翻译：减少四波混合入口
公开(公告)号：US09065964B1
公开(公告)日：2015-06-23
申请号：US12857929
申请日：2010-08-17
申请人： Venkatesh G. Mutalik , Marcel F. Schemmann , Shamsuddin H. Chasmawala , Joseph F. Chiappetta
发明人： Venkatesh G. Mutalik , Marcel F. Schemmann , Shamsuddin H. Chasmawala , Joseph F. Chiappetta
IPC分类号： H04N7/173 , H04N7/10 , H04N21/61
CPC分类号： H04N7/102 , H04B10/25751 , H04N7/22 , H04N21/61
摘要： A multi-wavelength CATV transmission system includes transmitters adapted to emit carrier wavelengths on a 12.5 GHz+/−20% ITU grid with a minimum spacing between carriers and/or carriers and their beat product groups of 37.5 GHz+/−20%.
摘要翻译：多波长CATV传输系统包括适用于在12.5GHz +/- 20％ITU网格上发射载波波长的发射机，载波和/或载波之间的最小间隔以及它们的频率产生组37.5GHz +/- 20％。

3. 发明授权

US07433598B2 Uncooled laser generation of narrowcast CATV signal 有权
标题翻译：未冷却的窄带CATV信号的激光产生
公开(公告)号：US07433598B2
公开(公告)日：2008-10-07
申请号：US09896547
申请日：2001-06-29
申请人： Marcel F. C. Schemmann , Venkatesh G. Mutalik
发明人： Marcel F. C. Schemmann , Venkatesh G. Mutalik
IPC分类号： H04J14/00
CPC分类号： H04N7/22 , H04B10/506 , H04H20/69 , H04H20/78
摘要： A cable television (CATV) distribution system, and a method of forming and using the CATV distribution system. In a first embodiment, a narrowcast optical signal is generated by an uncooled laser and converted by a receiver into a narrowcast electrical signal. In a second embodiment, a narrowcast optical signal generated by an uncooled laser is combined with a broadcast optical signal by an optical coupler at a hub of the CATV distribution system to generate a composite optical signal, which at a CATV node is: split into the broadcast and narrowcast optical components, respectively converted into broadcast and narrowcast electrical components, and combined into a composite electrical signal. In a third embodiment, a narrowcast optical signal is generated by an uncooled laser and then combined with the broadcast optical signal by a single receiver.
摘要翻译：有线电视（CATV）分配系统，以及形成和使用CATV分配系统的方法。在第一实施例中，狭窄的光信号由未经制造的激光器产生并且由接收机转换成狭窄的电信号。在第二实施例中，由非制冷激光器产生的窄光信号通过光耦合器在CATV分配系统的集线器处与广播光信号组合，以产生复合光信号，其在CATV节点处：分为广播和窄幅光学元件分别转换为广播和窄幅电气元件，并组合成复合电信号。在第三实施例中，狭窄的光信号由未经制造的激光产生，然后通过单个接收器与广播光信号组合。

4. 发明申请

US20170302378A1 Burst Mode Node 审中-公开
公开(公告)号：US20170302378A1
公开(公告)日：2017-10-19
申请号：US15431113
申请日：2017-02-13
申请人： Venkatesh G. Mutalik , Marcel F. Schemmann , John Ulm , Zoran Maricevic
发明人： Venkatesh G. Mutalik , Marcel F. Schemmann , John Ulm , Zoran Maricevic
IPC分类号： H04B10/2575 , H04N5/38 , H04N7/22
CPC分类号： H04B10/25751 , H04H20/69 , H04H20/78 , H04L12/2856 , H04L12/2885 , H04N7/22 , H04Q11/0067
摘要： Systems and Methods for reducing distortion due to bursts of upstream transmission in an HFC CATV network. In some preferred systems, the functionality of an Optical Network Unit (ONU) may occur within a node or amplifier along a direction upstream from a subscriber's home.

5. 发明授权

US06583906B1 Pre-shaping laser modulation signals to increase modulation index 失效
标题翻译：预成形激光调制信号增加调制指数
公开(公告)号：US06583906B1
公开(公告)日：2003-06-24
申请号：US09343913
申请日：1999-06-30
申请人： Marcel F. Schemmann , Venkatesh G. Mutalik
发明人： Marcel F. Schemmann , Venkatesh G. Mutalik
IPC分类号： H04B1000
CPC分类号： H04B10/504 , H04B10/2507 , H04B10/58
摘要： An in-line pre-shaper for a laser transmitter distorts an electronic information signal to compensate for distortions resulting from the optical information signal provided by the laser transmitter, being transmitted through an optical cable, as well as, compensating for distortions resulting from using the electronic information signal to modulate the laser beam produced by the laser transmitter to provide the optical information signal. The pre-compensation reduces both second order and third order distortion of the optical signal for the combination of the laser and the optical cable. Even though the optical signal is more distorted at the output of the laser transmitter, the optical signal that arrives at the receiver is less distorted.
摘要翻译：用于激光发射器的在线预成形器扭曲电子信息信号以补偿由激光发射机提供的光信息信号产生的失真，通过光缆传输，以及补偿由于使用电子信息信号来调制由激光发射器产生的激光束以提供光信息信号。预补偿减少了用于激光和光缆的组合的光信号的二阶和三阶失真。即使光信号在激光发射器的输出处更加失真，到达接收机的光信号也较少失真。

6. 发明授权

US08503056B2 Bias point control circuit for externally modulated transmitter 有权
标题翻译：用于外调制发射机的偏置点控制电路
公开(公告)号：US08503056B2
公开(公告)日：2013-08-06
申请号：US13097987
申请日：2011-04-29
申请人： Marcel F. Schemmann , Venkatesh G. Mutalik
发明人： Marcel F. Schemmann , Venkatesh G. Mutalik
IPC分类号： G02B26/00 , H01S3/00 , G02B6/12 , G02B6/26
CPC分类号： G02F1/0123 , H04B10/50575
摘要： Methods and apparatuses for controlling a bias point voltage for an external optical modulator are provided. A control loop is used to adjust a bias signal applied to an external modulator by determining unwanted signals at a predetermined frequency received by an optical receiver of the control loop and accounting for these unwanted signals when determining the bias point voltage.
摘要翻译：提供了用于控制外部光调制器的偏置点电压的方法和装置。控制回路用于通过确定由控制回路的光接收器接收的预定频率的不需要的信号来调整施加到外部调制器的偏置信号，并在确定偏置点电压时考虑这些不需要的信号。

7. 发明授权

US06711190B2 Laser transmitter bias circuit 失效
标题翻译：激光发射机偏置电路
公开(公告)号：US06711190B2
公开(公告)日：2004-03-23
申请号：US09896377
申请日：2001-06-29
申请人： Marcel F. C. Schemmann , Venkatesh G. Mutalik
发明人： Marcel F. C. Schemmann , Venkatesh G. Mutalik
IPC分类号： H01S300
CPC分类号： H01S5/042 , H01S5/0427
摘要： A laser transmitter bias circuit for a laser diode transmitter, for use in a optical transmission system, e.g. in commercial CATV systems. The laser transmitter bias circuit reduces power consumption and heat dissipation by eliminating the conventional need for a distinct constant DC current supply for biasing the laser diode. Radio frequency (RF) circuitry, e.g., a radio frequency amplifier (e.g., a Hybrid Amplifier), connected in series to the laser diode supplies both a DC bias-current (IB) and an RF drive-current (IP) through the laser diode. The DC bias current through the laser diode in turn powers (and/or biases) the radio frequency amplifier and, optionally, other radio frequency circuitry. An optional diode-bypass current (IBP) path may be connected in parallel with the laser diode, and in series with the radio frequency amplifier to control bias current.
摘要翻译：一种用于激光二极管发射器的激光发射器偏置电路，用于光传输系统，例如，在商业CATV系统中。激光发射机偏置电路通过消除用于偏置激光二极管的不同恒定DC电流源的常规需求来降低功耗和散热。射频（RF）电路，例如与激光二极管串联连接的射频放大器（例如，混合放大器）通过激光器提供DC偏置电流（IB）和RF驱动电流（IP）二极管。通过激光二极管的直流偏置电流又对射频放大器和可选的其他射频电路（和/或偏置）供电。可选的二极管旁路电流（IBP）路径可以与激光二极管并联连接，并与射频放大器串联以控制偏置电流。

8. 发明授权

US06574389B1 Optical communication with pre-compensation for odd order distortion in modulation and transmission 有权
公开(公告)号：US06574389B1
公开(公告)日：2003-06-03
申请号：US09343909
申请日：1999-06-30
申请人： Marcel F. Schemmann , Venkatesh G. Mutalik
发明人： Marcel F. Schemmann , Venkatesh G. Mutalik
IPC分类号： G02B628
CPC分类号： H04B10/58 , H04B10/2507 , H04B10/504 , H04B10/506
摘要： An in-line pre-compensation circuit distorts an electronic information signal prior to using the signal to modulate a laser beam in order to compensate for distortions resulting from transmitting the resulting optical signal through an optical fiber. The pre-compensation circuit is dynamically adjustable for different lengths of optical fiber for simple installation and maintenance of the system. The adjustment can be made from a front panel of a laser transmitter during operation. Even though the optical signal is more distorted at the output of the laser transmitter, the optical signal that arrives at the receiver is less distorted.

9. 发明申请

US20110267670A1 BIAS POINT CONTROL CIRCUIT FOR EXTERNALLY MODULATED TRANSMITTER 有权
标题翻译：用于外部调制变送器的偏点控制电路
公开(公告)号：US20110267670A1
公开(公告)日：2011-11-03
申请号：US13097987
申请日：2011-04-29
申请人： Marcel F. Schemmann , Venkatesh G. Mutalik
发明人： Marcel F. Schemmann , Venkatesh G. Mutalik
IPC分类号： G02F1/01
CPC分类号： G02F1/0123 , H04B10/50575
摘要： Methods and apparatuses for controlling a bias point voltage for an external optical modulator are provided. A control loop is used to adjust a bias signal applied to an external modulator by determining unwanted signals at a predetermined frequency received by an optical receiver of the control loop and accounting for these unwanted signals when determining the bias point voltage.
摘要翻译：提供了用于控制外部光调制器的偏置点电压的方法和装置。控制回路用于通过确定由控制回路的光接收器接收的预定频率的不需要的信号来调整施加到外部调制器的偏置信号，并在确定偏置点电压时考虑这些不需要的信号。

10. 发明授权

US06687432B2 Optical communication with predistortion to compensate for odd order distortion in modulation and travel 有权
标题翻译：具有预失真的光通信，以补偿调制和行程中的奇数阶失真
公开(公告)号：US06687432B2
公开(公告)日：2004-02-03
申请号：US10114641
申请日：2002-04-02
申请人： Marcel F. Schemmann , Venkatesh G. Mutalik
发明人： Marcel F. Schemmann , Venkatesh G. Mutalik
IPC分类号： G02B628
CPC分类号： H04B10/58 , H04B10/2507 , H04B10/504 , H04B10/506
摘要： An in-line pre-compensation circuit distorts an electronic information signal prior to using the signal to modulate a laser beam in order to compensate for distortions resulting from transmitting the resulting optical signal through an optical fiber. The pre-compensation circuit is dynamically adjustable for different lengths of optical fiber for simple installation and maintenance of the system. The adjustment can be made from a front panel of a laser transmitter during operation. Even though the optical signal is more distorted at the output of the laser transmitter, the optical signal that arrives at the receiver is less distorted.
摘要翻译：在线预补偿电路在使用信号调制激光束之前扭曲电子信息信号，以补偿由于通过光纤传输所得到的光信号而导致的失真。对于不同长度的光纤，预补偿电路是可动态调整的，用于系统的简单安装和维护。可以在操作期间从激光发射器的前面板进行调整。即使光信号在激光发射机的输出处更加失真，到达接收机的光信号也较少失真。

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