公开(公告)号：US20060233213A1

公开(公告)日：2006-10-19

申请号：US11105912

申请日：2005-04-13

申请人： Fow-Sen Choa ,  Tawee Tanbun-Ek

发明人： Fow-Sen Choa ,  Tawee Tanbun-Ek

IPC分类号： H01S3/03

CPC分类号： H01S5/4043 ,  B82Y20/00 ,  H01S5/026 ,  H01S5/1014 ,  H01S5/3095 ,  H01S5/34306 ,  H01S5/34373 ,  H01S5/4087 ,  H01S2301/04 ,  H01S2301/185

摘要： A multi-quantum well optical waveguide structure comprises a plurality of active regions including quantum wells with different gain peak wavelengths to provide an ultra broadband optical gain spectrum. Two adjacent sets of active regions having a large band gap difference are connected by a tunneling injection layer to provide smooth electron transport. Single transverse-mode operation is obtained by narrowly tapering the width of the multi-quantum well optical waveguide from the center to the two ends. Higher-order modes are suppressed at the output of the tapered waveguide, even though the center waveguide portion supports higher-order modes. In this way, the multi- quantum well optical waveguide can be utilized for ultra broadband optical amplification using a single mode fiber.

摘要翻译： 多量子阱光波导结构包括多个有源区，包括具有不同增益峰值波长的量子阱，以提供超宽带光增益谱。 具有大带隙差的两组相邻的有源区通过隧道注入层连接，以提供平滑的电子传输。 通过将多量子阱光波导的宽度从中心狭窄地缩小到两端来获得单横模式操作。 即使中心波导部分支持高阶模式，高阶模也被抑制在锥形波导的输出处。 以这种方式，多量子阱光波导可以用于使用单模光纤的超宽带光放大。

公开(公告)号：US07433567B2

公开(公告)日：2008-10-07

申请号：US11105912

申请日：2005-04-13

申请人： Fow-Sen Choa ,  Tawee Tanbun-Ek

发明人： Fow-Sen Choa ,  Tawee Tanbun-Ek

IPC分类号： G02B6/10

CPC分类号： H01S5/4043 ,  B82Y20/00 ,  H01S5/026 ,  H01S5/1014 ,  H01S5/3095 ,  H01S5/34306 ,  H01S5/34373 ,  H01S5/4087 ,  H01S2301/04 ,  H01S2301/185

摘要： A multi-quantum well optical waveguide structure comprises a plurality of active regions including quantum wells with different gain peak wavelengths to provide an ultra broadband optical gain spectrum. Two adjacent sets of active regions having a large band gap difference are connected by a tunneling injection layer to provide smooth electron transport. Single transverse-mode operation is obtained by narrowly tapering the width of the multi-quantum well optical waveguide from the center to the two ends. Higher-order modes are suppressed at the output of the tapered waveguide, even though the center waveguide portion supports higher-order modes. In this way, the multi-quantum well optical waveguide can be utilized for ultra broadband optical amplification using a single mode fiber.

摘要翻译： 多量子阱光波导结构包括多个有源区，包括具有不同增益峰值波长的量子阱，以提供超宽带光增益谱。 具有大带隙差的两组相邻的有源区通过隧道注入层连接，以提供平滑的电子传输。 通过将多量子阱光波导的宽度从中心狭窄地缩小到两端来获得单横模式操作。 即使中心波导部分支持高阶模式，高阶模也被抑制在锥形波导的输出处。 以这种方式，多量子阱光波导可以用于使用单模光纤的超宽带光放大。

公开(公告)号：US20050040386A1

公开(公告)日：2005-02-24

申请号：US10478778

申请日：2002-02-20

申请人： Fow-Sen Choa

发明人： Fow-Sen Choa

IPC分类号： H01L29/06 ,  H01L29/24 ,  H01L31/0328 ,  H01S5/00 ,  H01S5/10 ,  H01S5/14 ,  H01S5/20 ,  H01S5/227 ,  H01S5/32 ,  H01S5/34 ,  H01S5/343 ,  H01S5/40

CPC分类号： B82Y20/00 ,  H01S5/005 ,  H01S5/1057 ,  H01S5/106 ,  H01S5/141 ,  H01S5/2077 ,  H01S5/227 ,  H01S5/3202 ,  H01S5/3205 ,  H01S5/34 ,  H01S5/34313 ,  H01S5/34373 ,  H01S5/4043 ,  H01S2304/04

摘要： A broadband medium (100) for a laser (300) having multiple quantum wells (130).

摘要翻译： 一种用于具有多个量子阱（130）的激光器（300）的宽带介质（100）。

公开(公告)号：US06727598B2

公开(公告)日：2004-04-27

申请号：US10143817

申请日：2002-05-14

申请人： Fow-Sen Choa

发明人： Fow-Sen Choa

IPC分类号： H01L2328

CPC分类号： H01S5/06256 ,  H01S5/02461 ,  H01S5/0261 ,  H01S5/0612

摘要： An improved thermally tunable system is provided. The improved thermally tunable system includes a thermally tunable apparatus including a first portion and a second portion, a heater configured to thermally tune the apparatus, and a heat sink disposed adjacent to the apparatus, wherein thermal flow is controlled to pass from the heater through the first portion of the apparatus, and then through the second portion into the heat sink, such that a temperature of the second portion remains substantially constant or within a predetermined range. A thermally conductive material is provided between the second portion of the apparatus and the heat sink. A thermally insulating material is provided between the first portion of the apparatus and the heat sink.

摘要翻译： 提供了一种改进的热可调系统。 改进的热可调谐系统包括热可调谐装置，其包括第一部分和第二部分，被配置为热调谐装置的加热器和邻近该装置设置的散热器，其中热流被控制从加热器通过 然后通过第二部分进入散热器，使得第二部分的温度保持基本上恒定或在预定范围内。 导热材料设置在设备的第二部分和散热器之间。 在设备的第一部分和散热器之间设置绝热材料。

公开(公告)号：US06944197B2

公开(公告)日：2005-09-13

申请号：US10179287

申请日：2002-06-26

申请人： Fow-Sen Choa

发明人： Fow-Sen Choa

IPC分类号： H01S5/10 ,  H01S5/20 ,  H01S5/227 ,  H01S5/34 ,  H01S5/50 ,  H01S3/14

CPC分类号： B82Y20/00 ,  H01S5/1057 ,  H01S5/106 ,  H01S5/2077 ,  H01S5/2272 ,  H01S5/34 ,  H01S5/50

摘要： An optical gain medium, and a method for forming the same, is provided that exhibits lower wavelength crosstalk when configured as an optical amplifier than prior art optical gain media. The optical gain medium of the present invention includes a buried heterostructure waveguide fabricated in a multiple quantum well (MQW) region. The MQW region in which the buried heterostructure waveguide is located exhibits a continuously changing bandgap as a function of position along the waveguide direction, preferably such that the gain provided by the optical gain medium changes exponentially as a function of position along the waveguide direction. In a preferred embodiment, the MQW region in which the buried heterostructure waveguide is buried is grown using a selective-area-growth (SAG) technique, and is made up of at least two quantum wells, with at least one of the quantum wells having a size and composition that vary as a function of position along the waveguide direction.

摘要翻译： 提供一种光学增益介质及其形成方法，当配置为比现有技术的光学增益介质作为光学放大器时，其表现出较低的波长串扰。 本发明的光学增益介质包括在多量子阱（MQW）区域中制造的掩埋异质结构波导。 掩埋异质结构波导位于其中的MQW区域表现出沿着波导方向作为位置的函数的连续变化的带隙，优选地使得由光学增益介质提供的增益作为沿着波导方向的位置的函数而呈指数变化。 在优选实施例中，使用选择区域增长（SAG）技术生长掩埋异质结构波导埋入的MQW区域，并且由至少两个量子阱组成，其中至少一个量子阱具有 沿着波导方向作为位置的函数变化的尺寸和组成。

公开(公告)号：US06337871B1

公开(公告)日：2002-01-08

申请号：US09353792

申请日：1999-07-15

申请人： Fow-Sen Choa

发明人： Fow-Sen Choa

IPC分类号： H01S500

CPC分类号： H01S5/0201 ,  H01S5/0042 ,  H01S5/12 ,  H01S5/187 ,  H01S5/4056 ,  H01S5/42

摘要： An edge-emitting laser having an edge-emitting output and a surface-emitting output. The edge-emitting laser has a resonator having a high order grating, preferably a second order grating capable of producing an edge-emitting component and a surface-emitting component. A waveguide is also located in the resonator and a cap layer is located above the waveguide and grating. The cavity is tested by taking measurements from the surface-emitting component eliminating the need for taking measurements from the edge-emitting component which is time consuming and expensive.

摘要翻译： 具有边缘发射输出和表面发射输出的边缘发射激光器。 边缘发射激光器具有具有高阶光栅的谐振器，优选地能够产生边缘发射部件和表面发射部件的二阶光栅。 波导也位于谐振器中，并且帽层位于波导和光栅上方。 通过从表面发射部件进行测量来测试腔体，消除了从边缘发射部件进行测量的需要，这是耗时且昂贵的。

公开(公告)号：US5020153A

公开(公告)日：1991-05-28

申请号：US308174

申请日：1989-02-08

申请人： Fow-Sen Choa ,  Thomas L. Koch

发明人： Fow-Sen Choa ,  Thomas L. Koch

IPC分类号： H01S3/10 ,  H01S5/00 ,  H01S5/0625 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/158 ,  H04B10/26 ,  H04B10/28

CPC分类号： H04B10/43 ,  H01S5/0028 ,  H01S5/06256

摘要： A lightwave communication system is disclosed in which an integrated receiver is realized as a distributed Bragg reflector (MQW-DBR) laser structure biased at or below threshold. The receiver functions simultaneously as a tunable filter, optical amplifier, photodetector, and, if desired, as an FSK discriminator. It is also disclosed that the lightwave receiver also is capable of half duplex operation as a lightwave transmitter using the same DBR laser structure. The disclosed receiver eliminates complex coupling of the many different element realized by the integrated, multifunction structure.

摘要翻译： 公开了一种光波通信系统，其中集成接收机被实现为偏置在或低于阈值的分布式布拉格反射器（MQW-DBR）激光器结构。 接收器作为可调谐滤波器，光放大器，光电检测器以及如果需要，作为FSK鉴别器同时工作。 还公开了光波接收机还能够作为使用相同的DBR激光器结构的光波发射机进行半双工操作。 所公开的接收器消除了由集成的多功能结构实现的许多不同元件的复杂耦合。

公开(公告)号：US10773096B2

公开(公告)日：2020-09-15

申请号：US15740175

申请日：2016-06-29

申请人： Liyi Elliott Hong ,  Fow-Sen Choa

发明人： Liyi Elliott Hong ,  Fow-Sen Choa

IPC分类号： A61N2/02 ,  A61N2/06 ,  A61N2/12 ,  A61N2/00

摘要： Methods and systems to control magnetic fields and magnetic field induced currents, and to provide stimulations within a patient's body, e.g.: deep brain stimulation, in a non-invasive manner and with greater focus and control than has been afforded by prior known methods and systems. An array of magnetic coils is provided and positionable about a portion of a patient's body, and are configured to create a small region of a magnetic hole, or configured to create a small region of concentrated magnetic field strength, or their combination, and at depths within the patient's body in a focused region and sparing the surrounding tissues of the focused region, that have previously not been receptive to non-invasive TMS methods, which are either focused but can affect only the surface and shadow areas, or that can reach certain depths but by doing so only through affecting large surface areas and deep tissue areas.

公开(公告)号：US06718087B2

公开(公告)日：2004-04-06

申请号：US09813102

申请日：2001-03-22

申请人： Fow-Sen Choa

发明人： Fow-Sen Choa

IPC分类号： G02B600

CPC分类号： H04B10/2581

摘要： A system and method for compensating for unwanted modes in multimode fiber transmissions includes a detector that receives an optical signal transmitted through a multimode optical fiber and converts the transmitted optical signal to a detector signal, an adaptive equalizer that generates an adaptive equalizer signal that, when combined with the detector signal, compensates for unwanted modes in the detector signal, and an adder that combines the adaptive equalizer signal with the detector signal.

摘要翻译： 用于补偿多模光纤传输中不想要的模式的系统和方法包括：接收通过多模光纤传输的光信号并将传输的光信号转换为检测器信号的检测器，产生自适应均衡器信号的自适应均衡器， 结合检测器信号，补偿检测器信号中的不需要的模式，以及将自适应均衡器信号与检测器信号组合的加法器。

公开(公告)号：US06657780B2

公开(公告)日：2003-12-02

申请号：US10078255

申请日：2002-02-20

申请人： Fow-Sen Choa

发明人： Fow-Sen Choa

IPC分类号： H01S300

CPC分类号： G02B6/12009 ,  H04J14/02 ,  H04Q11/0062 ,  H04Q2011/0075 ,  H04Q2011/0079

摘要： The present invention provides tunable optical system, and a method for forming the same, that exhibits a broader tuning range with fewer components than prior art tunable optical systems. The tunable optical system of the present invention includes a plurality of wavelength routers, each having a different optical channel resolution, optically coupled to a plurality of optical amplifier arrays. The free spectral range of each of the second and subsequent wavelength routers is equal to a total bandwidth of one of its respective grating orders. The system is tuned by selectively activating optical amplifiers in each of the optical amplifier arrays. The tunable optical system of the present invention can be used to make tunable semiconductor emitters, receivers and filters.