公开(公告)号：US06987905B2

公开(公告)日：2006-01-17

申请号：US10725804

申请日：2003-12-02

申请人： Yonglin Huang ,  Jian Liu ,  Qi Deng ,  Liren Du ,  Steve Wang

发明人： Yonglin Huang ,  Jian Liu ,  Qi Deng ,  Liren Du ,  Steve Wang

IPC分类号： G02B6/26

CPC分类号： G02B6/29361 ,  G02B6/29391 ,  H01S2301/04

摘要： A gain flattening and tap device. A gain flattening filter for use in fiber-optic communications includes a substrate. A GFF film is formed on a first surface of the substrate. An HR film is formed on a second surface of the substrate. The HR film is arranged to receive light from the GFF film and to reflect at least some of the light back through the GFF film. By passing the light through the GFF film multiple times, the effectiveness of the GFF film is multiplied. Further, by constructing the HR film to allow portions of the light to pass through, a tap may be implemented with the GFF.

摘要翻译： 增益平坦化和水龙头装置。 用于光纤通信的增益平坦化滤波器包括基板。 在基板的第一表面上形成GFF膜。 在衬底的第二表面上形成HR膜。 HR膜布置成接收来自GFF膜的光并且通过GFF膜反射至少一些光。 通过多次通过GFF胶片的光线，GFF胶片的效果倍增。 此外，通过构造HR膜以允许部分光通过，可以用GFF实现丝锥。

公开(公告)号：US20070253664A1

公开(公告)日：2007-11-01

申请号：US11775820

申请日：2007-07-10

申请人： Jian Liu ,  Steve Wang ,  Xuejun Lu ,  Yonglin Huang

发明人： Jian Liu ,  Steve Wang ,  Xuejun Lu ,  Yonglin Huang

IPC分类号： G02B6/26

CPC分类号： H04B10/2941 ,  H01S2301/04

摘要： An optical waveguide for use in amplifying light signals with an integrated gain equalization filter. The optical waveguide includes a gain section for amplifying light signals. The optical waveguide further includes an equalization filter to improve the uniformity of optical gain over a wavelength range for which the gain section is intended to provide amplification.

摘要翻译： 一种用于用积分增益均衡滤波器放大光信号的光波导。 光波导包括用于放大光信号的增益部分。 光波导还包括均衡滤波器，以提高在增益部分旨在提供放大的波长范围上的光学增益的均匀性。

公开(公告)号：US07495825B2

公开(公告)日：2009-02-24

申请号：US11775820

申请日：2007-07-10

申请人： Jian Liu ,  Steve Wang ,  Xuejun Lu ,  Yonglin Huang

发明人： Jian Liu ,  Steve Wang ,  Xuejun Lu ,  Yonglin Huang

IPC分类号： H04B10/17 ,  H04B10/12

CPC分类号： H04B10/2941 ,  H01S2301/04

摘要： An optical waveguide for use in amplifying light signals with an integrated gain equalization filter. The optical waveguide includes a gain section for amplifying light signals. The optical waveguide further includes an equalization filter to improve the uniformity of optical gain over a wavelength range for which the gain section is intended to provide amplification.

摘要翻译： 一种用于用积分增益均衡滤波器放大光信号的光波导。 光波导包括用于放大光信号的增益部分。 光波导还包括均衡滤波器，以提高在增益部分旨在提供放大的波长范围上的光学增益的均匀性。

公开(公告)号：US07440171B2

公开(公告)日：2008-10-21

申请号：US10384227

申请日：2003-03-07

申请人： Jian Liu ,  Zheng Wang ,  Yonglin Huang ,  Xuejun Lu

发明人： Jian Liu ,  Zheng Wang ,  Yonglin Huang ,  Xuejun Lu

IPC分类号： H01S4/00 ,  H04B10/12

CPC分类号： H01S3/06758 ,  H01S3/06708 ,  H01S3/06716

摘要： An optical amplifier utilizes two or more doped fiber segments or portions to achieve a lower noise figure and a higher saturation power than would be possible using any one of the doped fiber segments. Each doped fiber portion may be considered to be a doped fiber optical amplifier, and has a different doping level than each of the other doped fiber portions. Each such doped fiber portion has distinct amplitude gain and noise characteristics relative to each of the other doped fiber potions. The two or more doped fiber portions are coupled to each other in series and most often in a predefined order based on their relative amplitude gain, noise and saturation power characteristics.

摘要翻译： 光放大器利用两个或更多个掺杂光纤段或部分来实现比使用任一掺杂光纤段可能的更低的噪声系数和更高的饱和功率。 每个掺杂光纤部分可以被认为是掺杂光纤放大器，并且具有与每个其它掺杂光纤部分不同的掺杂水平。 每个这样的掺杂光纤部分相对于每个其它掺杂的光纤部分具有不同的振幅增益和噪声特性。 两个或更多个掺杂的光纤部分基于它们的相对幅度增益，噪声和饱和功率特性，以串联方式并且最经常以预定的顺序相互耦合。

公开(公告)号：US07031051B2

公开(公告)日：2006-04-18

申请号：US10384228

申请日：2003-03-07

申请人： Jian Liu ,  Zheng Wang ,  Yonglin Huang ,  Xuejun Lu

发明人： Jian Liu ,  Zheng Wang ,  Yonglin Huang ,  Xuejun Lu

IPC分类号： H04B10/12

CPC分类号： H04B10/2918 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094061

摘要： A dual fiber optic amplifier uses a single pump source for two or more optical power amplifiers. The dual fiber optic amplifier includes a pump source that emits light, a pump splitter, a first optical power amplifier and a second optical power amplifier. The pump splitter splits the light emitted by the pump source into two or more portions. The first optical power amplifier includes an optical fiber input, an optical fiber output, and a doped fiber portion, wherein the first portion of light from the splitter is coupled into the optical fiber input of the first optical power amplifier. The second optical power amplifier includes an optical fiber input, an optical fiber output, and a doped fiber portion, wherein the second portion of light emitted from the splitter is coupled into the optical fiber input of the second optical power amplifier.

摘要翻译： 双光纤放大器使用单个泵浦源用于两个或更多个光功率放大器。 双光纤放大器包括发射光的泵浦源，泵分离器，第一光功率放大器和第二光功率放大器。 泵分配器将由泵浦源发射的光分成两部分或更多部分。 第一光功率放大器包括光纤输入，光纤输出和掺杂光纤部分，其中来自分离器的第一部分光耦合到第一光功率放大器的光纤输入端。 第二光功率放大器包括光纤输入，光纤输出和掺杂光纤部分，其中从分路器发射的光的第二部分耦合到第二光功率放大器的光纤输入端。

公开(公告)号：US07236700B1

公开(公告)日：2007-06-26

申请号：US10269176

申请日：2002-10-11

申请人： Jian Liu ,  Zheng Wang ,  Xuejun Lu ,  Yonglin Huang

发明人： Jian Liu ,  Zheng Wang ,  Xuejun Lu ,  Yonglin Huang

IPC分类号： H04J14/06

CPC分类号： H04J14/0221 ,  H04B10/291 ,  H04B2210/003

摘要： Erbium doped fiber amplifiers for dense wavelength division multiplexed (DWDM) metro area optical networks may be configured as either high gain amplifiers or power amplifiers. The erbium doped fiber type, length, and pump power level are selected so that the shape of the gain spectra is approximately the same for single channel or multi-channel operation. In one embodiment, the same erbium doped fiber type and length is used for both power amplifiers and high gain amplifiers, reducing manufacturing costs.

摘要翻译： 用于密集波分复用（DWDM）城域区光网络的掺铒光纤放大器可以被配置为高增益放大器或功率放大器。 选择铒掺杂光纤类型，长度和泵浦功率电平，使得对于单通道或多通道操作，增益谱的形状大致相同。 在一个实施例中，相同的掺铒光纤类型和长度用于功率放大器和高增益放大器两者，降低制造成本。

公开(公告)号：USD1019826S1

公开(公告)日：2024-03-26

申请号：US29916182

申请日：2023-11-08

申请人： Jian Liu

设计人： Jian Liu

摘要： FIG. 1 is a front, top perspective view of a glider exercise device, showing my new design;
FIG. 2 is a rear, bottom perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.

公开(公告)号：US20230046316A1

公开(公告)日：2023-02-16

申请号：US17885130

申请日：2022-08-10

申请人： Jian Liu ,  Lakshmi Ravi ,  Dong Dong ,  Rolando Burgos ,  Steven Schmalz

发明人： Jian Liu ,  Lakshmi Ravi ,  Dong Dong ,  Rolando Burgos ,  Steven Schmalz

IPC分类号： H01H9/54 ,  H01H33/59

摘要： Gate control of power semiconductor devices using reduced gate drivers is disclosed. A circuit breaker may include a multitude of transistors, such as insulated gate bipolar transistors (IGBTs), connected in series with one another. Each transistor may be connected to a respective gate resistor. Diodes may be connected between various gate resistors. One or more resistor-capacitor (RC) snubber circuits may be provided in parallel with one or more of the transistors. Likewise, one or more metal-oxide varistors (MOVs) may be connected in parallel to one or more of the transistors. A gate driver (e.g., a single gate drive) may be connected to the one or more diodes and an emitter of at least one of transistors.

公开(公告)号：US11465240B2

公开(公告)日：2022-10-11

申请号：US16378485

申请日：2019-04-08

申请人： Jian Liu

发明人： Jian Liu

IPC分类号： B23K26/34 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  G01N21/19 ,  G01N21/71 ,  G01N21/88 ,  G01N21/17 ,  G01B11/30 ,  B22F10/20 ,  B22F10/36 ,  B22F10/28 ,  B22F10/30 ,  B22F10/50 ,  B22F12/90 ,  B29C64/393 ,  B23K26/354 ,  G01J5/00 ,  G01J5/80

摘要： Methods and apparatuses for manufacturing are disclosed, including (a) providing an apparatus having: a laser; scanner; powder injection system; powder spreading system; dichroic filter; imager-and-processor; and computer; (b) programming the computer with specifications of a sample; (c) using the computer to set initial parameters based on the sample specifications; (d) adjusting a stage to position the sample; (e) focusing and scanning electromagnetic radiation onto the sample while powder is concurrently injected onto the sample in order to deposit a layer; (f) capturing two-dimensional images of the sample and probing the sample to determine whether the deposited layer was manufactured per the specifications; (g) use the computer to adjust the three-dimensional manufacturing parameters based on the determination made in step (f) prior to additively manufacturing a subsequent layer or making repairs; and (h) repeating steps (d), (e), (f), and (g) until the manufacture is complete. Other embodiments are described and claimed.

公开(公告)号：US09748383B2

公开(公告)日：2017-08-29

申请号：US12867257

申请日：2009-02-12

申请人： Elizabeth Ching Tee Kho ,  Zheng Chao Liu ,  Deb Kumar Pal ,  Michael Mee Gouh Tiong ,  Jian Liu ,  Kia Yaw Kee

发明人： Yong Hai Hu ,  Elizabeth Ching Tee Kho ,  Zheng Chao Liu ,  Deb Kumar Pal ,  Michael Mee Gouh Tiong ,  Jian Liu ,  Kia Yaw Kee ,  William Lau

IPC分类号： H01L29/78 ,  H01L29/06 ,  H01L29/423

CPC分类号： H01L29/7834 ,  H01L29/0653 ,  H01L29/42368 ,  H01L29/7835

摘要： A Metal Oxide Semiconductor (MOS) transistor comprising: a source; a gate; and a drain, the source, gate and drain being located in or on a well structure of a first doping polarity located in or on a substrate; wherein at least one of the source and the drain comprises a first structure comprising: a first region forming a first drift region, the first region being of a second doping polarity opposite the first doping polarity; a second region of the second doping polarity in or on the first region, the second region being a well region and having a doping concentration which is higher than the doping concentration of the first region; and a third region of the second doping polarity in or on the second region. Due to the presence of the second region the transistor may have a lower ON resistance when compared with a similar transistor which does not have the second region. The breakdown voltage may be influenced only to a small extent.