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1.发明授权Hybrid laser power combining and beam cleanup system using nonlinear and adaptive optical wavefront compensation 失效混合激光功率组合和束清理系统采用非线性和自适应光波前补偿
公开(公告)号：US5717516A
公开(公告)日：1998-02-10
申请号：US825835
申请日：1997-04-04
申请人： Marvin B. Klein , David M. Pepper , Ronald R. Stephens , Thomas R. O'Meara , David Welch , Robert J. Lang , Jack L. Feinberg , Stuart MacCormack
发明人： Marvin B. Klein , David M. Pepper , Ronald R. Stephens , Thomas R. O'Meara , David Welch , Robert J. Lang , Jack L. Feinberg , Stuart MacCormack
CPC分类号： G02F1/397
摘要： An optical amplification system directs a diffraction-limited signal beam through a series of approximately 90.degree. crossings with a number of non-diffraction-limited pump beams in a photorefractive medium. All of the beams are s-polarized, resulting in an energy transfer from the pumps to the signal beam while leaving the signal beam diffraction-limited. The photorefractive medium is preferably a series of BaTiO.sub.3 :Rh crystals that receive the pump and signal beams through orthogonal faces, with their C-axes at approximately 45.degree. to both beams. A binary tree optical distribution network is used to minimize waveguide splits in forming a large number of pump beams. The outputs of several amplification modules are combined into a single output beam using adaptive optics, with the outputs from the different modules phase matched to each other by diverting two minor portions of the combined beam, partially overlapping the diverted beams and adjusting the amplification module phases to cancel phase differentials between the overlapped portions. Similarly, sets of combined and phase-matched beams can be combined with each other (again using adaptive optics) to generate still higher powers using a super module approach.
摘要翻译： 光学放大系统通过在光折射介质中的许多非衍射受限的泵浦光束将衍射受限的信号光束引导通过一系列大约90°的交叉。 所有的光束都是s偏振的，从而导致从泵到信号光束的能量传递，同时保持信号光束衍射受限。 光折射介质优选是一系列BaTiO 3：Rh晶体，其通过正交面接收泵浦和信号光束，其C轴与两个波束大约45°。 二叉树光分配网络用于最小化形成大量泵浦波束的波导分裂。 使用自适应光学器件将多个放大模块的输出组合成单个输出光束，来自不同模块的输出通过转移组合光束的两个次要部分相互匹配，部分地与转向光束重叠并且调整放大模块相位 以消除重叠部分之间的相位差。 类似地，组合和相位匹配波束的组可以彼此组合（再次使用自适应光学器件）以使用超级模块方法来产生更高的功率。
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2.发明授权Optical amplification system with non-orthogonal signal and distributed multi-pump beams and photorefractive cleanup 失效具有非正交信号和分布式多泵浦光束的光学放大系统和光折射清理
公开(公告)号：US5729375A
公开(公告)日：1998-03-17
申请号：US609200
申请日：1996-03-01
IPC分类号： H01S3/0941 , H01S3/16 , H01S3/08 , G02B5/23 , G02F1/01
CPC分类号： H01S3/0941 , H01S3/16 , H01S3/1675
摘要： An optical amplification system directs a diffraction-limited signal beam through a series of crossings, at substantially less than 90.degree. crossing angles, with a number of non-diffraction-limited pump beams in a photorefractive medium. The pump beams are e-polarized while the signal beam travels down the crystal medium's c-axis and is polarized in the same plane as the pump beam polarization, resulting in an energy transfer from the pumps to the signal beam while leaving the signal beam diffraction-limited. The photorefractive medium is preferably a series of BaTiO.sub.3 :Rh crystals that are aligned parallel to the angled edge of a wedged-shape prism through which the pump beams are transmitted, with the crystals cut so that their C-axes are parallel to the signal beam.
摘要翻译： 光学放大系统通过与光折射介质中的许多非衍射受限的泵浦光束基本上小于90°交叉角的一系列交叉引导衍射受限的信号光束。 泵浦光束被e偏振，同时信号光束沿着晶体介质的c轴向下移动并且在与泵浦光束偏振相同的平面中被极化，导致从泵到信号光束的能量传递，同时留下信号束衍射 -有限。 光折射介质优选是一系列BaTiO 3：Rh晶体，其平行于楔形棱镜的倾斜边缘排列，泵浦光束通过该倾斜边缘被透射，晶体被切割成使得它们的C轴平行于信号束 。
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公开(公告)号：US5430748A
公开(公告)日：1995-07-04
申请号：US184676
申请日：1994-01-21
CPC分类号： H01S3/10076 , H01S5/4025 , H01S5/145 , H01S5/2036 , H01S5/4006 , H01S5/4062
摘要： A laser system includes a linear array of broad area lasers. Such a laser source produces a beam that has a polarization axis in the direction in which the array extends and a coherency axis orthogonal to that. The laser is injection locked by phase conjugating a portion of the array's light output. The phase conjugator has a conjugation axis. The coherency axis is aligned with this conjugation axis. External cavity optics include a polarization rotator to align the polarization axis with the coherency axis before the beam reaches the phase conjugator. Thus, the polarization, coherency, and conjugation axes are all aligned, optimizing the action of the phase conjugator. The approach works in both a single-beam and a dual-beam phase conjugation mode. The result is a laser system output of higher intensity, greater coherence, and a narrower frequency range.
摘要翻译： 激光系统包括广域激光器的线性阵列。 这样的激光源产生在阵列延伸的方向上具有偏振轴的光束和与之相垂直的相干轴。 激光器通过相位共轭阵列的光输出的一部分被注入锁定。 相位共轭器具有共轭轴。 相干轴与该共轭轴对齐。 外腔光学器件包括偏振旋转器，以在光束到达相位共轭器之前将偏振轴与相干轴对准。 因此，极化，相干性和共轭轴都对齐，优化了相位共轭器的作用。 该方法在单光束和双光束相位共轭模式中均有效。 结果是激光系统的输出强度更高，相干性更强，频率范围更窄。
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4.发明申请Method and apparatus for efficient coupling of pump light into fiber amplifiers 审中-公开用于将泵浦光有效耦合到光纤放大器中的方法和装置公开(公告)号：US20050207455A1
公开(公告)日：2005-09-22
申请号：US11014229
申请日：2004-12-15
IPC分类号： G02B6/28 , H01S20060101 , H01S3/067 , H01S3/094 , H01S3/30
CPC分类号： H01S3/06754 , G02B6/2856 , H01S3/06708 , H01S3/06729 , H01S3/06737 , H01S3/094003
摘要： A fiber amplifier is disclosed and includes a fiber amplifier body comprising a core of a first diameter, at least one signal conduit in optical communication with a signal source and the fiber amplifier body, the signal conduit sized to the first diameter, and one or more pump conduits configured to propagate pump radiation to the fiber amplifier body, the pump conduits in optical communication with at least one pump source.
摘要翻译： 公开了一种光纤放大器，其包括：光纤放大器本体，其包括第一直径的芯，与信号源光纤通信的至少一个信号导管和光纤放大器本体，尺寸为第一直径的信号导线，以及一个或多个 泵管道被配置为将泵浦辐射传播到光纤放大器主体，泵管道与至少一个泵浦源光学通信。
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5.发明授权Fiber gain medium marking system pumped or seeded by a modulated laser diode source and method of energy control 失效通过调制激光二极管源和能量控制方法泵送或种子的光纤增益介质标记系统公开(公告)号：US06275250B1
公开(公告)日：2001-08-14
申请号：US09235125
申请日：1999-01-21
IPC分类号： B41J2435
CPC分类号： B23K26/032 , B23K26/06 , B23K26/064 , B23K26/0648 , B23K26/0665 , G06K1/126
摘要： Double clad fiber gain medium systems particularly adapted for marking indicia on surfaces of articles are disclosed. These systems provide a modulated output from a pump or seed semiconductor laser source to a double clad fiber gain medium which provides an amplified marking output scanned over the article surface with an optical scanner forming a plurality of strokes, the completion of which results in the indicia.
摘要翻译： 公开了特别适用于在物品表面上标记标记的双包层光纤增益介质系统。 这些系统提供从泵浦或种子半导体激光源到双包层光纤增益介质的调制输出，其提供用物镜表面扫描的放大的标记输出，该光学扫描器形成多个笔划，其完成导致标记 。
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公开(公告)号：US6049415A
公开(公告)日：2000-04-11
申请号：US986406
申请日：1997-12-08
CPC分类号： H01S3/06758 , H01S3/0078 , H01S3/06712 , H01S3/0675 , H01S3/2316 , H01S3/2333
摘要： A number of variations are provided of a device that provides an amplified single polarization optical signal. Each of these relies on the use of a non-polarization maintaining gain medium through which the signal is directed, and a polarization shifter and reflector that direct the signal back through the same gain medium with a shifted polarization state. An input polarization beamsplitter directs the returning optical signal away to an output, based on its shifted polarization state. The embodiments of the invention include the use of double-clad fiber. Multiple stages may be used to provide specific amplification parameters. In one embodiment, both amplification stages reside in the same polarization shifting optical path. A polarization maintaining amplifier of this type may be used as part of a master oscillator-power amplifier, in which polarization maintaining fiber is used as part of the source laser. Wavelength selective components are also used in certain embodiments of the invention, to allow for wavelength selectivity, as well as a single polarization state, in amplifiers, lasers and amplified spontaneous emission (ASE). In one embodiment, an optical circulator is used to allow the amplified, shifted polarization state signals to be directed away from the input to a desired output port. A feedback loop may also be used to control the polarization state at the amplifier output. A polarization beamsplitter at the output directs light not having the desired polarization state to a photodetector, the output of which is used by a polarization controller at the input, such that the input polarization state is adjusted until the control signal from the photodetector is minimized.
摘要翻译： 提供了一种提供放大的单偏振光信号的装置的变型。 这些都依赖于使用信号引导的非偏振维持增益介质，以及偏振移动器和反射器，其将信号反向通过具有偏移偏振状态的相同增益介质。 输入偏振分束器基于其移动的偏振状态将返回光信号导向输出。 本发明的实施例包括使用双包层光纤。 可以使用多个阶段来提供特定的扩增参数。 在一个实施例中，两个放大级位于相同的偏振移位光路中。 这种类型的偏振保持放大器可以用作主振荡器功率放大器的一部分，其中使用偏振保持光纤作为源激光器的一部分。 在本发明的某些实施例中也使用波长选择性分量，以便在放大器，激光器和放大的自发发射（ASE）中允许波长选择性以及单个极化状态。 在一个实施例中，光环行器用于允许放大的偏移偏振状态信号被引导离开输入到期望的输出端口。 还可以使用反馈回路来控制放大器输出端的极化状态。 输出处的偏振分束器将不具有期望的偏振状态的光引导到光电检测器，其输出由偏振控制器在输入端使用，使得输入偏振状态被调整直到来自光电检测器的控制信号最小化。
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公开(公告)号：US07016104B2
公开(公告)日：2006-03-21
申请号：US10610510
申请日：2003-06-30
申请人： Erji Mao , Stuart MacCormack , Greg Roth , Steven Sanders
发明人： Erji Mao , Stuart MacCormack , Greg Roth , Steven Sanders
IPC分类号： H01S3/00
CPC分类号： H04B10/296 , H01S3/1305 , H01S3/1312 , H01S3/302 , H04B10/2916
摘要： The present application relates to a Raman amplifier having an increased dynamic range, and particularly for laser pump sources and a method of pumping Raman fiber amplifiers over a greater dynamic range. In a multi-channel optical system, optical amplifiers must be able to provide gains over a large dynamic range, which is determined by the distribution of node-to-node distances in the network, as well as the number of channels. The present invention has found that the dynamic range of a Raman amplifier can be significantly increased by using pulse width modulation to pulse pump current at or near the minimum current stability threshold, in order to produce lower power output. The duty cycle of the pulsed current is selected to achieve a time-averaged operating condition, thus the time averaged pump power can be reduced in a linear fashion well below the capability of a continuous wave system.
摘要翻译： 本申请涉及具有增加的动态范围的拉曼放大器，特别是用于激光泵浦源的拉曼放大器以及在更大动态范围内泵浦拉曼光纤放大器的方法。 在多通道光学系统中，光放大器必须能够在大的动态范围内提供增益，这取决于网络中节点到节点间距离的分布以及信道数量。 本发明已经发现，为了产生较低的功率输出，通过使脉冲宽度调制到等于或接近最小电流稳定阈值的脉冲泵电流，可以显着提高拉曼放大器的动态范围。 选择脉冲电流的占空比以实现时间平均的操作条件，因此可以以远低于连续波系统的能力的线性方式减小时间平均的泵浦功率。
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公开(公告)号：US20050276286A1
公开(公告)日：2005-12-15
申请号：US10867531
申请日：2004-06-14
申请人： Stuart MacCormack , Robert Waarts
发明人： Stuart MacCormack , Robert Waarts
CPC分类号： H01S3/117 , H01S3/0675 , H01S3/09408 , H01S3/1103 , H01S3/1127 , H01S3/115
摘要： A laser apparatus for generating optical pulses is disclosed, said laser apparatus has a reflecting gain element preferably including a fiber gain medium. The reflecting gain element is coupled to a controllable reflecting/transmitting module having a reflecting state and a transmitting state, wherein the controllable reflecting/transmitting means are operable to switch from the transmitting state to the reflecting state to initiate a build-up of an optical pulse, and to switch back to the transmitting state for outputting the optical pulse before it reaches the reflecting/transmitting means after a cavity roundtrip. In a preferred embodiment, the controllable reflecting/transmitting module includes an acousto-optic switch at an output end of a laser operable to output the optical pulse in zeroth diffraction order.
摘要翻译： 公开了一种用于产生光脉冲的激光装置，所述激光装置具有优选包括光纤增益介质的反射增益元件。 反射增益元件耦合到具有反射状态和发射状态的可控反射/发射模块，其中可控反射/发射装置可操作以从透射状态切换到反射状态，以启动光学 并且在空腔往返之前到达反射/发射装置之前切换回发送状态以输出光脉冲。 在优选实施例中，可控反射/发射模块包括在激光器的输出端处的声光开关，可操作以以零级衍射级输出光脉冲。
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公开(公告)号：US06963681B2
公开(公告)日：2005-11-08
申请号：US10611784
申请日：2003-06-30
申请人： Erji Mao , Stuart MacCormack , Greg Roth , Steven Sanders
发明人： Erji Mao , Stuart MacCormack , Greg Roth , Steven Sanders
CPC分类号： H04B10/296 , H01S3/1305 , H01S3/1312 , H01S3/302 , H04B10/2916
摘要： The invention relates to a method for automatic dynamic gain control in optical Raman amplifiers and an optical Raman amplifier adapted for the same. The present invention has found that in multiple pump Raman amplifiers a substantially linear relationship exists between total amplified signal power and pump power for each of different wavelength pumps, in order to maintain an original gain profile and gain levels for an optical link with a fully loaded channel configuration, in response to dropped channels. In accordance with the method, and an amplifier programmed to practice the method, a set of pump power values and signal level values required to maintain the characterized gain profile and gain levels for a plurality of channel loading configurations are pre-established for the each pump wavelength. A linear function from each set of pre-established values is derived for each pump wavelength. Advantageously, a single photodiode can replace a costly and complex channel monitor for providing signal responsive pump control.
摘要翻译： 本发明涉及一种用于光学拉曼放大器中的自动动态增益控制的方法和适用于其的光学拉曼放大器。 本发明已经发现，在多个泵浦拉曼放大器中，对于每个不同波长的泵，总放大信号功率和泵浦功率之间存在基本上线性的关系，以便维持原始增益分布和具有满载的光链路的增益水平 频道配置，以响应丢失的频道。 根据该方法和被编程为实施该方法的放大器，为每个泵预先建立了维持多个通道加载配置的特征增益曲线和增益水平所需的一组泵功率值和信号电平值 波长。 从每个泵浦波长得到每组预先建立的值的线性函数。 有利地，单个光电二极管可以代替昂贵且复杂的通道监视器，以提供信号响应泵控制。
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公开(公告)号：US06603896B1
公开(公告)日：2003-08-05
申请号：US09677113
申请日：2000-09-29
IPC分类号： G02B628
CPC分类号： H01S3/06758 , H01S3/06708 , H01S3/10015 , H01S3/1301 , H01S2301/04
摘要： The gain of a fiber amplifier is typically not uniform across the bandwidth used for amplifying optical communications signals. In a power fiber amplifier unit, having a fiber pre-amplifier and a fiber power amplifier, the gain tilt of the fiber power amplifier is generally set by the level of gain saturation. The gain tilt of the fiber pre-amplifier is adjustable by controlling the population inversion density in the amplifying medium. The gain tilt of the fiber pre-amplifier may be adjusted so as to at least partially compensate for the gain tilt of the power amplifier.
摘要翻译： 在用于放大光通信信号的带宽上，光纤放大器的增益通常是不均匀的。 在具有光纤预放大器和光纤功率放大器的功率光纤放大器单元中，光纤功率放大器的增益倾斜度通常由增益饱和度的水平设定。 光纤前置放大器的增益倾斜可以通过控制放大介质中的群体反转密度来调节。 可以调整光纤预放大器的增益倾斜，以至少部分地补偿功率放大器的增益倾斜。
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