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111. 发明授权

US5185752A Coupling arrangements for frequency-doubled diode lasers 失效
标题翻译：倍频二极管激光器的耦合布置
公开(公告)号：US5185752A
公开(公告)日：1993-02-09
申请号：US837819
申请日：1992-02-18
申请人： David F. Welch , Robert G. Waarts
发明人： David F. Welch , Robert G. Waarts
IPC分类号： G02F1/35 , H01S3/109 , H01S5/06 , H01S5/065 , H01S5/14
CPC分类号： H01S5/141 , G02F1/3775 , G02F2001/3548 , G02F2202/20 , H01S5/0092 , H01S5/02252 , H01S5/0654 , H01S5/4062 , H01S5/4087
摘要： Arrangements for efficiently coupling light between a laser diode and a second-harmonic generator which feature external resonant cavities that include a feedback grating fabricated on the second-harmonic generator. The feedback grating reflects light of a first frequency that matches the frequency doubling band of the second-harmonic generator, thereby establishing stable laser oscillation at that first frequency. Preferably, the second-harmonic generator has a periodically-poled waveguide formed in the surface of the nonlinear material body. The laser diode may be butted against the harmonic generator or coupling optics may be positioned between the two. In one arrangement, a polarizer is placed in the resonant cavity, either between an external back reflector and the back facet of the laser diode or between the antireflection coated front facet of the laser diode and the harmonic generator, to provide loss to the TE polarization mode and enhance oscillation in the TM polarization mode. In another arrangement, a half-wave plate is positioned between the antireflection coated front facet of the laser diode and the input end of the harmonic generator to cause TE mode oscillation in the laser diode, while coupling TM polarized light into the harmonic generator. The laser diode may be a monolithic laser diode array with multiple emitters, with the second-harmonic generator having multiple waveguides for receiving and doubling the frequency of light received from a corresponding diode emitter. The diode array may be a multiple wavelength array.
摘要翻译：用于在激光二极管和二次谐波发生器之间有效耦合光的布置，其特征在于包括在二次谐波发生器上制造的反馈光栅的外部谐振腔。反馈光栅反射与二次谐波发生器的倍频带匹配的第一频率的光，从而在该第一频率处建立稳定的激光振荡。优选地，二次谐波发生器具有形成在非线性材料体的表面中的周期性极化的波导。激光二极管可以对着谐波发生器，或者耦合光学器件可以位于两者之间。在一种布置中，偏振器被放置在谐振腔中，无论是在外部后反射器和激光二极管的背面之间，还是在激光二极管的抗反射涂覆的前面与谐波发生器之间，以提供TE偏振损耗模式，并增强TM偏振模式下的振荡。在另一种布置中，半波片位于激光二极管的抗反射涂层前面和谐波发生器的输入端之间，以在激光二极管中引起TE模式振荡，同时将TM偏振光耦合到谐波发生器中。激光二极管可以是具有多个发射器的单片激光二极管阵列，其中二次谐波发生器具有多个波导，用于接收并加倍从相应的二极管发射器接收的光的频率。二极管阵列可以是多波长阵列。

112. 发明授权

US08861977B2 Multiplexer and modulation arrangements for multi-carrier optical modems 有权
标题翻译：多载波光调制解调器的多路复用器和调制方案
公开(公告)号：US08861977B2
公开(公告)日：2014-10-14
申请号：US13078888
申请日：2011-04-01
申请人： John D. McNicol , Matthew L. Mitchell , David F. Welch
发明人： John D. McNicol , Matthew L. Mitchell , David F. Welch
IPC分类号： H04J14/00 , H04J14/06 , H04J14/02
CPC分类号： H04J14/02 , H04J14/0256 , H04J14/026 , H04J14/06
摘要： A number of carriers are selected according to a modulation format and symbol rate to realize a superchannel having fixed capacity, for example. At a receive node, the superchannel is optically demultiplexed from a plurality of other superchannels. The plurality of carriers are then supplied to a photodetector circuit, which receives additional light at one of the optical signal carrier wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of the carriers is unnecessary.
摘要翻译：根据调制格式和符号率来选择多个载波，以实现例如具有固定容量的超频道。在接收节点处，超级信道从多个其他超级信道被光解复用。然后将多个载波提供给光电检测器电路，该电路从本地振荡器激光器接收来自光信号载波波长的其中一个附加光。在接收节点中提供模数转换器（ADC），以将从光电检测器输出的电信号转换为数字形式。然后在电域中对ADC的输出进行滤波，使得载波的光解复用是不必要的。

113. 发明申请

US20120082459A1 WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATION SYSTEM HAVING VARIABLE CHANNEL SPACINGS AND DIFFERENT MODULATION FORMATS 有权
标题翻译：具有可变通道间距和不同调制格式的波长段多路复用光通信系统
公开(公告)号：US20120082459A1
公开(公告)日：2012-04-05
申请号：US12897787
申请日：2010-10-05
申请人： Kuang-Tsan Wu , John D. McNicol , David F. Welch , Stephen G. Grubb , Pierre Mertz
发明人： Kuang-Tsan Wu , John D. McNicol , David F. Welch , Stephen G. Grubb , Pierre Mertz
IPC分类号： H04J14/02
CPC分类号： H04J14/02 , H04B10/616 , H04J14/0224 , H04J14/0227 , H04J14/0241 , H04J14/026 , H04J14/0279 , H04J14/06 , H04L1/0007 , H04L1/0009 , H04L5/0008 , H04L25/03834 , H04L27/0008 , H04L27/2035 , H04L27/223 , H04L27/34
摘要： Consistent with the present disclosure, data, in digital form, is received by a transmit nodes of an optical communication, and converted to analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data. The modulated light is then transmitted over an optical communication path to a receive node. At the receive node, the modulated optical signal, as well as other modulated optical signals are supplied to a photodetector circuit, which receives additional light at one of the optical signal wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of individual channels is unnecessary.
摘要翻译：与本公开一致，数字形式的数据由光通信的发射节点接收，并由数模转换器（DAC）转换为模拟信号以驱动调制器。调制器又根据接收的数据调制多个波长中的一个波长的光。然后将调制的光通过光通信路径传输到接收节点。在接收节点处，调制的光信号以及其它调制的光信号被提供给光电检测器电路，光电检测器电路从本地振荡器激光器接收来自光信号波长之一的附加光。在接收节点中提供模数转换器（ADC），以将从光电检测器输出的电信号转换为数字形式。然后在电域中对来自ADC的输出进行滤波，使得各个信道的光解复用是不必要的。

114. 发明申请

US20120057873A1 OPTICAL COMMUNICATION SYSTEM HAVING LOW LATENCY 有权
标题翻译：具有低延迟的光通信系统
公开(公告)号：US20120057873A1
公开(公告)日：2012-03-08
申请号：US12875672
申请日：2010-09-03
申请人： PAUL R. MORKEL , David F. Welch
发明人： PAUL R. MORKEL , David F. Welch
IPC分类号： H04J14/02
CPC分类号： H04J14/0221 , H04B10/2916
摘要： Consistent with the present disclosure, an optical communication system is provided in which client data is input to a first node and output from a second node, spaced from the first node, with little delay. In one example, the delay is reduced by including higher order Raman amplifiers that provide a substantially uniform gain along the length of a fiber optic link, thereby reducing the number of EDFAs that may otherwise be installed along the optical fiber link or eliminating such EDFAs entirely. In another example, FEC encoding and decoding are not employed, thereby reducing the delay even further.
摘要翻译：与本公开一致，提供了一种光通信系统，其中客户端数据被输入到第一节点并且从与第一节点间隔开的第二节点输出几乎没有延迟。在一个示例中，通过包括沿着光纤链路的长度提供基本上均匀的增益的较高阶拉曼放大器来减小延迟，由此减少否则可以沿着光纤链路安装的EDFA的数量或完全消除这样的EDFA 。在另一示例中，不使用FEC编码和解码，从而进一步减少延迟。

115. 发明授权

US06580552B2 Shared pump and serial rare earth doped fiber optical amplifiers 有权
标题翻译：共享泵和串联稀土掺杂光纤放大器
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。

116. 发明授权

US06489985B1 Laser marking system and method of energy control 有权
标题翻译：激光打标系统和能量控制方法
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。

117. 发明授权

US06411323B1 High power marking system achieved through power scaling via multiplexing 失效
标题翻译：通过多路复用功率缩放实现高功率标记系统
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。

118. 发明授权

US06347007B1 Semiconductor laser high power amplifier system 有权
标题翻译：半导体激光大功率放大器系统
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。

119. 发明授权

US06275632B1 High power fiber gain media system achieved through power scaling via multiplexing 有权
公开(公告)号：US06275632B1
公开(公告)日：2001-08-14
申请号：US09724106
申请日：2000-11-25
申请人： Robert G. Waarts , David F. Welch , Stephen G. Grubb , Jean-Luc Archambault , Steven Sanders , Raymond Zanoni , Donald R. Scifres
发明人： Robert G. Waarts , David F. Welch , Stephen G. Grubb , Jean-Luc Archambault , Steven Sanders , Raymond Zanoni , Donald R. Scifres
IPC分类号： G02B634
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 wavelengths, pulsing or polarization modes of operation is achieved through multiplex combining of the multiple fiber gain sources to provide high power outputs, such as ranging from tens of watts to hundreds of watts, provided on a single mode or multimode fiber.

120. 发明授权

US06181721B2 Visible wavelength, semiconductor optoelectronic device with a high power broad, significantly laterally uniform, diffraction limited output beam 失效
$Visible wavelength, semiconductor optoelectronic device with a high power broad, significantly laterally uniform, diffraction limited output beam$
标题翻译：可见波长，半导体光电器件具有功率大，横向均匀，衍射极限输出光束
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。

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