公开(公告)号：US07158699B2

公开(公告)日：2007-01-02

申请号：US11136735

申请日：2005-05-24

申请人： David F. Welch ,  Radhakrishnan L. Nagarajan ,  Fred A. Kish, Jr. ,  Mark J. Missey ,  Vincent G. Dominic ,  Atul Mathur ,  Frank H. Peters ,  Charles H. Joyner

发明人： David F. Welch ,  Radhakrishnan L. Nagarajan ,  Fred A. Kish, Jr. ,  Mark J. Missey ,  Vincent G. Dominic ,  Atul Mathur ,  Frank H. Peters ,  Charles H. Joyner

IPC分类号： G02B6/28 ,  G02B6/34 ,  G02B6/12 ,  H04B10/08 ,  H04B10/06

CPC分类号： H04B10/2914 ,  B82Y20/00 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/12011 ,  G02B6/12019 ,  G02B6/12023 ,  G02B6/12026 ,  G02B6/12028 ,  G02B6/1203 ,  G02B6/12033 ,  G02B6/4249 ,  G02F1/01725 ,  G02F2001/0175 ,  G02F2001/01758 ,  H01S5/026 ,  H01S5/0264 ,  H01S5/0265 ,  H01S5/0268 ,  H01S5/0425 ,  H01S5/06256 ,  H01S5/06258 ,  H01S5/0683 ,  H01S5/101 ,  H01S5/1014 ,  H01S5/12 ,  H01S5/1228 ,  H01S5/183 ,  H01S5/2077 ,  H01S5/22 ,  H01S5/2224 ,  H01S5/227 ,  H01S5/3404 ,  H01S5/3408 ,  H01S5/34306 ,  H01S5/4025 ,  H01S5/4031 ,  H01S5/4087 ,  H01S5/50 ,  H01S5/5072 ,  H04B10/25 ,  H04B10/50 ,  H04B10/675 ,  H04J14/02

摘要： A method is disclosed for optimizing optical channel signal demultiplexing in a monolithic receiver photonic integrated circuit (RxPIC) chip by providing an integrated channel signal demultiplexing with multiple waveguide input verniers provided to an WDM signal demultiplexer. The RxPIC chip may optionally include an integrated amplifier in at least some of the waveguide input verniers. The RxPIC chip may be comprised of, in monolithic form, a plurality of optional semiconductor optical amplifiers (SOAs) at the input of the chip to receive a WDM signal from an optical link which is provided along a plurality of waveguide input verniers to an integrated optical demultiplexer, such as, but not limited to, an arrayed waveguide grating (AWG), as a WDM signal demultiplexer. Thus, optical outputs from the respective semiconductor laser amplifiers are provided as vernier inputs to the optical demultiplexer forming a plurality of input verniers at the input to the optical demultiplexer. One of the vernier inputs to the chip is selected for operation in the RxPIC chip that corresponds to an optimum performance in matching a WDM channel signal wavelength grid of the received WDM signal to a wavelength grid of the on-chip optical demultiplexer.

摘要翻译： 公开了一种用于通过提供给提供给WDM信号解复用器的多个波导输入游标的集成信道信号解复用来优化单片接收机光子集成电路（RxPIC）芯片中的光信道信号解复用的方法。 RxPIC芯片可以可选地在至少一些波导输入游标中包括集成放大器。 RxPIC芯片可以以单片形式包括在芯片的输入端处的多个可选的半导体光放大器（SOA），以从沿着多个波导输入游标提供的集成的光链路接收WDM信号 光解复用器，例如但不限于阵列波导光栅（AWG），作为WDM信号解复用器。 因此，来自各个半导体激光放大器的光输出被提供为在光解复用器的输入处形成多个输入游标的光解复用器的游标输入。 选择芯片的游标输入之一用于RxPIC芯片中的操作，其对应于将所接收的WDM信号的WDM信道信号波长网格与芯片上的光解复用器的波长网格匹配的最佳性能。

公开(公告)号：US07079720B2

公开(公告)日：2006-07-18

申请号：US10917798

申请日：2004-08-13

申请人： Fred A. Kish, Jr. ,  Charles H. Joyner ,  David F. Welch ,  Robert B. Taylor ,  Alan C. Nilsson

发明人： Fred A. Kish, Jr. ,  Charles H. Joyner ,  David F. Welch ,  Robert B. Taylor ,  Alan C. Nilsson

IPC分类号： G02B6/12

CPC分类号： G02B6/12033 ,  B82Y20/00 ,  G02B6/02204 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/12019 ,  G02B6/12023 ,  G02B6/12026 ,  G02B6/12028 ,  G02B6/124 ,  G02F1/01725 ,  G02F2001/0175 ,  G02F2001/01758 ,  H01S5/0085 ,  H01S5/024 ,  H01S5/02415 ,  H01S5/02453 ,  H01S5/02461 ,  H01S5/02476 ,  H01S5/026 ,  H01S5/0261 ,  H01S5/0264 ,  H01S5/0265 ,  H01S5/0268 ,  H01S5/0425 ,  H01S5/0612 ,  H01S5/06256 ,  H01S5/06258 ,  H01S5/0683 ,  H01S5/0687 ,  H01S5/12 ,  H01S5/1228 ,  H01S5/2077 ,  H01S5/22 ,  H01S5/2214 ,  H01S5/2224 ,  H01S5/227 ,  H01S5/2272 ,  H01S5/2275 ,  H01S5/3408 ,  H01S5/34306 ,  H01S5/4025 ,  H01S5/4031 ,  H01S5/4087 ,  H01S5/50 ,  H04B10/2914 ,  H04B10/50 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02

摘要： A method of operating an array of laser sources integrated as an array in a single monolithic chip where the steps include designing the laser sources to have different target emission wavelengths so that together they form a spectral emission wavelength grid, coupling outputs from the laser sources to an array of gain/loss elements also integrated on the single monolithic chip, one each receiving the output from a respective laser source; and adjusting the outputs with the gain/loss elements so that the power levels across the laser source array are substantially uniform.

摘要翻译： 操作在单个单片芯片中集成为阵列的激光源阵列的方法，其中步骤包括设计激光源以具有不同的目标发射波长，使得它们一起形成光谱发射波长网格，将来自激光源的输出耦合到 增益/损耗元件阵列也集成在单个单片芯片上，一个接收来自相应激光源的输出; 并且利用增益/损耗元件调整输出，使得激光源阵列上的功率电平基本上均匀。

公开(公告)号：US07058246B2

公开(公告)日：2006-06-06

申请号：US10267346

申请日：2002-10-08

申请人： Charles H. Joyner ,  Fred A. Kish, Jr. ,  Frank H. Peters ,  Atul Mathur ,  David F. Welch ,  Andrew G. Dentai ,  Damien Lambert ,  Richard P. Schneider ,  Mark J. Missey

发明人： Charles H. Joyner ,  Fred A. Kish, Jr. ,  Frank H. Peters ,  Atul Mathur ,  David F. Welch ,  Andrew G. Dentai ,  Damien Lambert ,  Richard P. Schneider ,  Mark J. Missey

IPC分类号： G02B6/12

CPC分类号： H01S5/06258 ,  G02B6/12019 ,  G02B6/12033 ,  H01S5/026 ,  H01S5/0265 ,  H01S5/106 ,  H01S5/12 ,  H01S5/204 ,  H01S5/205 ,  H01S5/22 ,  H01S5/4031

摘要： A monolithic photonic integrated circuit (PIC) chip comprises an array of modulated sources providing a plurality of channel signals of different wavelengths and an optical combiner coupled to receive the channel signals and produce a combined output of the channel signals. The arrays of modulated sources are formed as ridge waveguides to enhance the output power from the respective modulated sources so that the average output power from the sources is approximately 2 to 4 times higher than in the case of comparable arrays of modulated sources formed as buried waveguides.

公开(公告)号：US06580552B2

公开(公告)日：2003-06-17

申请号：US09940186

申请日：2001-08-27

申请人： David F. Welch

发明人： David F. Welch

IPC分类号： H01S300

CPC分类号： H01S3/2383 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094061 ,  H01S3/10007

摘要： An optical amplifier includes a plurality of optical paths each carrying an optical signal and each including active optical fiber. A shared pump laser is coupled to the plurality of optical paths and provides pump power to the plurality of optical paths to individually amplify the optical signals. The plurality of optical paths includes input and output optical isolators and a coupler for coupling the pump power to the optical path. The active optical fiber is doped with an implant selected from the group of rare earth metals, erbium, ytterbium, and both ytterbium and erbium. A variable attenuator can be connected between the pump laser and the coupler of at least one of the plurality of optical paths or adjacent to the output isolator of one of the optical paths. Another optical amplifier serially couples optical signals to the optical path on a common gain media.

摘要翻译： 光放大器包括多个光路，每个光路都携带光信号，每个光路包括有源光纤。 共享泵激光器耦合到多个光路，并且向多个光路提供泵浦功率以单独放大光信号。 多个光路包括输入和输出光隔离器和用于将泵浦功率耦合到光路的耦合器。 有源光纤掺杂有选自稀土金属，铒，镱，以及镱和铒的植入物。 可变衰减器可以连接在泵浦激光器和多个光路中的至少一个光路的耦合器上，或者与光路之一的输出隔离器相邻。 另一个光放大器将光信号串联耦合到公共增益介质上的光路上。

公开(公告)号：US06489985B1

公开(公告)日：2002-12-03

申请号：US09668894

申请日：2000-09-21

申请人： Mark A. Brodsky ,  David F. Welch ,  Yong Yim

发明人： Mark A. Brodsky ,  David F. Welch ,  Yong Yim

IPC分类号： B41J2435

CPC分类号： B23K26/032 ,  B23K26/06 ,  B23K26/064 ,  B23K26/0643 ,  B23K26/0648 ,  B23K26/0665 ,  B41M5/26 ,  G06K1/126 ,  H01S3/067 ,  H01S3/094007 ,  H01S3/1312

摘要： A laser marking system includes a high power fiber laser with a double clad fiber having a doped core surrounded by an inner pump cladding and providing an optical output for marking; a high power laser diode source for pumping the double clad fiber laser via an input into the inner pump cladding; an optical scanner coupled to receive the marking output from the double clad fiber laser to scan the output over a surface of an article to be marked by sweeping the marking output in one, two or three dimensions to form strokes, the completion of which comprises indicia to be marked on the article surface; and a controller to control the operation of the scanner synchronized with the modulation of the laser diode pump source to initiate the marking output and sweep and modulate the marking optical output in one, two or three dimensions to form strokes comprising the indicia. A main advantage of the fiber laser marking system over CO2 and YAG laser marking systems is the ability to provide modulation via the semiconductor laser diode at the input to the marking laser rather than having to modulate the optical power beam at the output of the marking laser, such as through an acusto-optic modulator, which provides for a pulse of non-uniform stability across the pulse width with a substantial decrease in the amount of power in the modulated beam output. Also disclosed is circuitry to dampen the ON-time rise of a current signal input for operation of the laser diode pump source to improve the ON-time quality of the marking optical output created by the double clad fiber marking laser.

摘要翻译： 激光打标系统包括具有双包层光纤的高功率光纤激光器，其具有由内部泵浦包层围绕的掺杂核心并提供用于标记的光学输出; 用于通过输入泵浦双包层光纤激光器的内部泵浦包层的高功率激光二极管源; 光学扫描器，其耦合以接收来自双包层光纤激光器的标记输出，以通过在一个，两个或三个维度上扫描标记输出来扫描要标记的制品的表面上的输出，以形成笔触，其完成包括标记 被标记在物品表面上; 以及控制器，用于控制与激光二极管泵浦源的调制同步的扫描仪的操作，以启动标记输出并扫描并调制一维，二维或三维的标记光学输出，以形成包括标记的笔画。 光纤激光打标系统比CO2和YAG激光打标系统的主要优点是能够通过半导体激光二极管在标记激光器的输入端提供调制，而不必在标记激光器的输出处调制光功率光束 ，例如通过acusto-optic调制器，其提供跨脉冲宽度的不均匀稳定的脉冲，并且调制的光束输出中的功率的量显着降低。 还公开了用于抑制用于激光二极管泵浦源的操作的电流信号输入的导通时间上升以提高由双包层光纤标记激光器产生的标记光学输出的导通时间质量的电路。

公开(公告)号：US06411323B1

公开(公告)日：2002-06-25

申请号：US09732477

申请日：2000-12-07

申请人： Robert G. Waarts ,  David F. Welch

发明人： Robert G. Waarts ,  David F. Welch

IPC分类号： B41J2700

CPC分类号： G02B6/29319 ,  H01S3/067 ,  H01S3/0675 ,  H01S3/094015 ,  H01S3/2383 ,  H01S3/2391 ,  H01S3/30 ,  H01S3/302 ,  H01S5/146 ,  H01S5/4012 ,  H01S5/4025 ,  H01S5/4031 ,  H04B10/291

摘要： Power scaling by multiplexing multiple fiber gain sources with different wave-lengths is useful in printing applications requiring higher optical powers to perform the printing function, such as through thermal inducement in thermal ablation, thermal fusion, thermal diffusion or thermal transfer. A marking system is disclosed using a plurality of laser sources operating at different wavelengths with their respective outputs coupled into a respective single mode fiber. At least one WDM combiner is coupled to receive and combine the laser source outputs into a single output. The combined power single output provides sufficient power intensity to induce thermal marking on a marking medium.

摘要翻译： 通过复用具有不同波长的多个光纤增益源进行功率缩放在打印需要较高光功率以执行打印功能的应用中是有用的，例如通过热消融，热融合，热扩散或热传递中的热诱导。 公开了使用以不同波长工作的多个激光源的标记系统，其各自的输出耦合到相应的单模光纤中。 耦合至少一个WDM组合器以将激光源输出接收并组合成单个输出。 组合功率单输出提供足够的功率强度以在标记介质上引起热标记。

公开(公告)号：US06347007B1

公开(公告)日：2002-02-12

申请号：US09586405

申请日：2000-06-02

申请人： Stephen G. Grubb ,  David F. Welch ,  Raymond Zanoni

发明人： Stephen G. Grubb ,  David F. Welch ,  Raymond Zanoni

IPC分类号： H01S300

CPC分类号： H01S3/0057 ,  B23K26/06 ,  B23K26/064 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/06787 ,  H01S3/094003 ,  H01S3/094015 ,  H01S3/094026 ,  H01S3/094042 ,  H01S3/094061 ,  H01S3/10023 ,  H01S3/2316 ,  H01S3/2333 ,  H01S5/06216 ,  H01S2301/02

摘要： A high power laser optical amplifier system for material processing comprises multiple stage fiber amplifiers with rejection of propagating ASE buildup in and between the amplifier stages as well as elimination of SBS noise providing output powers in the range of about 10 &mgr;J to about 100 &mgr;J or more. The system is driven with a time varying drive signal from a modulated semiconductor laser signal source to produce an optical output allowing modification of the material while controlling its thermal sensitivity by varying pulse shapes or pulse widths supplied at a desire repetition rate via modulation of a semiconductor laser signal source to the system to precisely control the applied power application of the beam relative to the thermal sensitivity of the material to be processed. The high power fiber amplifier system has particular utility in high power applications requiring process treatment of surfaces, such as polymeric, organic, ceramic and metal surfaces, e.g., material processing, surface texturing, heat treatment, surface engraving, fine micro-machining, surface ablation, cutting, grooving, bump forming, coating, soldering, sealing, surface diffusion and surface conversion to a compound. A particular example is given for texturing of disk surfaces of magnetic disk media prior to the deposition or coating of a thin magnetic film on the textured surfaces to prevent slider stiction.

摘要翻译： 用于材料处理的高功率激光光放大器系统包括多级光纤放大器，其抑制在放大器级之间和放大器级之间的传播ASE积聚，以及消除SBS噪声，提供在约10μJ至约100μJ或更大的范围内的输出功率 。 该系统由来自调制的半导体激光信号源的时变驱动信号驱动以产生允许修改材料的光学输出，同时通过改变通过半导体的调制以期望的重复频率提供的脉冲形状或脉冲宽度来控制其热敏感性 激光信号源到系统，以精确地控制光束的施加功率相对于待处理材料的热敏感性。 高功率光纤放大器系统在高功率应用中具有特殊应用，需要对表面进行处理，例如聚合物，有机，陶瓷和金属表面，例如材料加工，表面纹理，热处理，表面雕刻，精细微加工，表面 烧蚀，切割，切槽，凸块形成，涂覆，焊接，密封，表面扩散和表面转化成化合物。 给出了在将磁性薄膜沉积或涂覆在纹理化表面上之前对磁盘介质的磁盘表面进行纹理化以防滑块粘结的一个具体实例。

公开(公告)号：US06181721B2

公开(公告)日：2001-01-30

申请号：US08650704

申请日：1996-05-20

申请人： Randall S. Geels ,  Ross A. Parke ,  David F. Welch

发明人： Randall S. Geels ,  Ross A. Parke ,  David F. Welch

IPC分类号： H01S319

CPC分类号： B82Y20/00 ,  H01S5/0425 ,  H01S5/0625 ,  H01S5/0658 ,  H01S5/10 ,  H01S5/1021 ,  H01S5/1025 ,  H01S5/1053 ,  H01S5/1064 ,  H01S5/1089 ,  H01S5/12 ,  H01S5/2036 ,  H01S5/2059 ,  H01S5/2063 ,  H01S5/2231 ,  H01S5/3211 ,  H01S5/3215 ,  H01S5/32325 ,  H01S5/34326 ,  H01S2301/18

摘要： A Group III-V semiconductor optoelectronic device provides for visible wavelength light output having a more laterally uniform, high power beam profile, albeit still quasi-Gaussian. A number of factors contribute to the enhanced profile including an improvement in reducing band offset of the Group III-V deposited layers improving carrier density through a decrease in the voltage drop require to generate carrier flow; reduction of contaminants in the growth of Group III-V AlGaInP-containing layers with compositional Al, providing for quality material necessary to achieve operation at the desired visible wavelengths; the formation of an optical resonator cavity that provides, in part, weak waveguiding of the propagating light; and the utilization of a mechanism to provide for beam spreading and filing in a beam diverging gain section prior to actively aggressive gain pumping of the propagating light in the device.

摘要翻译： III-V族半导体光电子器件提供具有更横向均匀的高功率光束分布的可见波长光输出，尽管仍然是准高斯。 许多因素有助于增强轮廓，包括通过减少需要产生载流子的压降降低III-V族沉积层的带偏移来改善载流子密度; 在组成Al的III-V族AlGaInP层的生长中减少污染物，提供实现在所需可见波长下操作所需的优质材料; 光学谐振腔的形成部分地提供传播光的弱波导; 以及在对装置内的传播光进行积极的增益泵浦之前利用一种机构来在光束发散增益部分中提供光束扩展和归档。

公开(公告)号：US6151338A

公开(公告)日：2000-11-21

申请号：US819950

申请日：1997-03-18

申请人： Stephen G. Grubb ,  David F. Welch ,  Raymond Zanoni

发明人： Stephen G. Grubb ,  David F. Welch ,  Raymond Zanoni

IPC分类号： B23K26/06 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/23 ,  H01S5/062 ,  H01S3/30

CPC分类号： H01S3/0057 ,  B23K26/06 ,  B23K26/064 ,  H01S3/06754 ,  H01S3/10023 ,  H01S2301/02 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/06729 ,  H01S3/06787 ,  H01S3/094003 ,  H01S3/094015 ,  H01S3/094026 ,  H01S3/094042 ,  H01S3/094061 ,  H01S3/2316 ,  H01S3/2333 ,  H01S5/06216

摘要： A high power laser optical amplifier system for material processing comprises multiple stage fiber amplifiers with rejection of propagating ASE buildup in and between the amplifier stages as well as elimination of SBS noise providing output powers in the range of about 10 .mu.J to about 100 .mu.J or more. The system is driven with a time varying drive signal from a modulated semiconductor laser signal source to produce an optical output allowing modification of the material while controlling its thermal sensitivity by varying pulse shapes or pulse widths supplied at a desire repetition rate via modulation of a semiconductor laser signal source to the system to precisely control the applied power application of the beam relative to the thermal sensitivity of the material to be processed. The high power fiber amplifier system has particular utility in high power applications requiring process treatment of surfaces, such as polymeric, organic, ceramic and metal surfaces, e.g., material processing, surface texturing, heat treatment, surface engraving, fine micro-machining, surface ablation, cutting, grooving, bump forming, coating, soldering, sealing, surface diffusion and surface conversion to a compound. A particular example is given for texturing of disk surfaces of magnetic disk media prior to the deposition or coating of a thin magnetic film on the textured surfaces to prevent slider stiction.

摘要翻译： 用于材料处理的高功率激光光放大器系统包括多级光纤放大器，其抑制在放大器级之间和放大器级之间的传播ASE积聚，以及消除SBS噪声，提供在约10μJ至约100μJ的范围内的输出功率 或者更多。 该系统由来自调制的半导体激光信号源的时变驱动信号驱动以产生允许修改材料的光学输出，同时通过改变通过半导体的调制以期望的重复频率提供的脉冲形状或脉冲宽度来控制其热敏感性 激光信号源到系统，以精确地控制光束的施加功率相对于待处理材料的热敏感性。 高功率光纤放大器系统在高功率应用中具有特殊应用，需要对表面进行处理，例如聚合物，有机，陶瓷和金属表面，例如材料加工，表面纹理，热处理，表面雕刻，精细微加工，表面 烧蚀，切割，切槽，凸块形成，涂覆，焊接，密封，表面扩散和表面转化成化合物。 给出了在将磁性薄膜沉积或涂覆在纹理化表面上之前对磁盘介质的磁盘表面进行纹理化以防止滑块粘滞的特定示例。

公开(公告)号：US6081369A

公开(公告)日：2000-06-27

申请号：US365582

申请日：1999-08-02

申请人： Robert G. Waarts ,  Steven Sanders ,  David F. Welch

发明人： Robert G. Waarts ,  Steven Sanders ,  David F. Welch

IPC分类号： H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/131 ,  H01S3/23 ,  H01S3/00

CPC分类号： H01S3/094003 ,  H01S3/06754 ,  H01S3/06758 ,  H01S2301/02 ,  H01S3/06729 ,  H01S3/06787 ,  H01S3/094026 ,  H01S3/094042 ,  H01S3/094076 ,  H01S3/094096 ,  H01S3/09415 ,  H01S3/1301

摘要： An optical amplifier system includes a fiber amplifier doped with rare earth dopant provided in its fiber core. A plurality of fiber lasers have their light outputs optically coupled together for launching into the fiber amplifier for optically pumping the amplifier. Each of the fiber lasers have a rare earth dopant provided in its fiber core for stimulated lasing emission with the rare earth dopant of the fiber amplifier being different from the rear earth dopant of the fiber lasers. A reflector may be provided in each of the coupling fibers for reflecting a portion of the respective light outputs back into the fiber lasers to control their wavelength of operation, the wavelength of operation of the reflectors chosen to be within a high absorption region of the absorption band of the fiber amplifier. Where the pump source is a semiconductor laser source, the source may include a flared gain section to increase the output intensity of the light output of the source.

摘要翻译： 光放大器系统包括在其光纤芯中提供的掺杂有稀土掺杂剂的光纤放大器。 多个光纤激光器具有光输出光耦合在一起，用于发射到光纤放大器中，用于光学泵浦放大器。 每个光纤激光器在其光纤芯中具有稀土掺杂剂，用于受激发射的激光发射，光纤放大器的稀土掺杂剂不同于光纤激光器的背面掺杂剂。 可以在每个耦合光纤中设置反射器，用于将各个光输出的一部分反射回光纤激光器，以控制它们的工作波长，反射器的工作波长选择在吸收的高吸收区域内 光纤放大器的带。 在泵浦源是半导体激光源的情况下，源可以包括扩张增益部分，以增加源的光输出的输出强度。