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11. 发明申请

US20070103765A1 Modular, high energy, widely-tunable ultrafast fiber source 有权
公开(公告)号：US20070103765A1
公开(公告)日：2007-05-10
申请号：US11643765
申请日：2006-12-22
申请人： Martin Fermann , Almantas Galvanauskas , Donald Harter
发明人： Martin Fermann , Almantas Galvanauskas , Donald Harter
IPC分类号： H01S3/00
CPC分类号： H01S3/1115 , H01S3/0057 , H01S3/0675 , H01S3/06754 , H01S3/094019 , H01S3/094042 , H01S3/109 , H01S3/1112 , H01S3/1616 , H01S3/1618 , H01S3/302
摘要： A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Modularity is ensured by the implementation of interchangeable amplifier components. System compactness is ensured by employing efficient fiber amplifiers, directly or indirectly pumped by diode lasers. Peak power handling capability of the fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive broadening is introduced by dispersive pulse stretching in the presence of self-phase modulation and gain, resulting in the formation of high-power parabolic pulses. In addition, dispersive broadening is also introduced by simple fiber delay lines or chirped fiber gratings, resulting in a further increase of the energy handling ability of the fiber amplifiers. The phase of the pulses in the dispersive delay line is controlled to quartic order by the use of fibers with varying amounts of waveguide dispersion or by controlling the chirp of the fiber gratings. After amplification, the dispersively stretched pulses can be re-compressed to nearly their bandwidth limit by the implementation of another set of dispersive delay lines. To ensure a wide tunability of the whole system, Raman-shifting of the compact sources of ultrashort pulses in conjunction with frequency-conversion in nonlinear optical crystals can be implemented, or an Anti-Stokes fiber in conjunction with fiber amplifiers and Raman-shifters are used. A particularly compact implementation of the whole system uses fiber oscillators in conjunction with fiber amplifiers. Additionally, long, distributed, positive dispersion optical amplifiers are used to improve transmission characteristics of an optical communication system. Finally, an optical communication system utilizes a Raman amplifier fiber pumped by a train of Raman-shifted, wavelength-tunable pump pulses, to thereby amplify an optical signal which counterpropogates within the Raman amplifier fiber with respect to the pump pulses.

12. 发明申请

US20060171018A1 Microchip-Yb fiber hybrid optical amplifier for micro-machining and marking 失效
公开(公告)号：US20060171018A1
公开(公告)日：2006-08-03
申请号：US11372185
申请日：2006-03-10
申请人： Almantas Galvanauskas , Donald Harter , Martin Fermann , Ferenc Raksi
发明人： Almantas Galvanauskas , Donald Harter , Martin Fermann , Ferenc Raksi
IPC分类号： H01S3/00
CPC分类号： H01S3/115 , H01S3/005 , H01S3/0604 , H01S3/0606 , H01S3/06754 , H01S3/08031 , H01S3/094007 , H01S3/09415 , H01S3/1611 , H01S3/1618 , H01S3/1673
摘要： The invention describes techniques for the control of the spatial as well as spectral beam quality of multi-mode fiber amplification of high peak power pulses as well as using such a configuration to replace the present diode-pumped, Neodynium based sources. Perfect spatial beam-quality can be ensured by exciting the fundamental mode in the multi-mode fibers with appropriate mode-matching optics and techniques. The loss of spatial beam-quality in the multi-mode fibers along the fiber length can be minimized by using multi-mode fibers with large cladding diameters. Near diffraction-limited coherent multi-mode amplifiers can be conveniently cladding pumped, allowing for the generation of high average power. Moreover, the polarization state in the multi-mode fiber amplifiers can be preserved by implementing multi-mode fibers with stress producing regions or elliptical fiber cores These lasers find application as a general replacement of Nd: based lasers, especially Nd:YAG lasers. Particularly utility is disclosed for applications in the marking, micro-machining and drilling areas.

13. 发明申请

US20050243409A1 Microchip - Yb fiber hybrid optical amplifier for micro-machining and marking 有权
标题翻译： Microchip - Yb光纤混合光放大器用于微加工和标记
公开(公告)号：US20050243409A1
公开(公告)日：2005-11-03
申请号：US11141704
申请日：2005-06-01
申请人： Donald Harter , Martin Fermann
发明人： Donald Harter , Martin Fermann
IPC分类号： H01S3/06 , H01S3/067 , H01S3/094 , H01S3/10 , H01S3/11 , H01S3/16 , H01S3/30
CPC分类号： H01S3/0627 , G02B6/262 , G02F1/3525 , H01S3/0606 , H01S3/0615 , H01S3/06708 , H01S3/06754 , H01S3/094003 , H01S3/094007 , H01S3/094069 , H01S3/09415 , H01S3/115 , H01S3/1611 , H01S3/1618 , H01S3/1673 , H01S3/302
摘要： The invention describes techniques for the control of the spatial as well as spectral beam quality of multi-mode fiber amplification of high peak power pulses as well as using such a configuration to replace the present diode-pumped, Neodynium based sources. Perfect spatial beam-quality can be ensured by exciting the fundamental mode in the multi-mode fibers with appropriate mode-matching optics and techniques. The loss of spatial beam-quality in the multi-mode fibers along the fiber length can be minimized by using multi-mode fibers with large cladding diameters. Near diffraction-limited coherent multi-mode amplifiers can be conveniently cladding pumped, allowing for the generation of high average power. Moreover, the polarization state in the multi-mode fiber amplifiers can be preserved by implementing multi-mode fibers with stress producing regions or elliptical fiber cores These lasers find application as a general replacement of Nd: based lasers, especially Nd:YAG lasers. Particularly utility is disclosed for applications in the marking, micro-machining and drilling areas.
摘要翻译：本发明描述了用于控制高峰值功率脉冲的多模光纤放大的空间以及光束质量的技术，以及使用这种配置来替代当前二极管泵浦的基于钕的源。通过适当的模式匹配光学和技术，可以通过激发多模光纤中的基模来确保完美的空间光束质量。通过使用具有大包层直径的多模光纤，能够使沿着光纤长度的多模光纤中的空间光束质量损失最小化。近衍射极限相干多模放大器可以方便地进行包层泵浦，从而产生高平均功率。此外，通过实施具有应力产生区域或椭圆形光纤核心的多模光纤，可以保持多模光纤放大器中的偏振状态。这些激光器可用作Nd基激光器，尤其是Nd：YAG激光器的一般替代。公开了用于标记，微加工和钻孔领域的应用。

14. 发明申请

US20050105865A1 All-fiber chirped pulse amplification systems 有权
标题翻译：全光纤啁啾脉冲放大系统
公开(公告)号：US20050105865A1
公开(公告)日：2005-05-19
申请号：US10992762
申请日：2004-11-22
申请人： Martin Fermann , Gennady Imeshev , Gyu Cho , Zhenlin Liu , Donald Harter
发明人： Martin Fermann , Gennady Imeshev , Gyu Cho , Zhenlin Liu , Donald Harter
IPC分类号： G02B6/26 , H01S3/00 , H01S3/067
CPC分类号： H01S3/0057 , H01S3/0064 , H01S3/0078 , H01S3/06712 , H01S3/06725 , H01S3/06741 , H01S3/06754 , H01S3/06758 , H01S3/094007 , H01S3/1086 , H01S3/1301 , H01S3/1608 , H01S3/1618 , H01S3/2308 , H01S3/2316 , H01S3/302
摘要： By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved. Finally, by amplifying positively chirped pulses in negative dispersion fiber amplifiers, low noise wavelength tunable seed source via anti-Stokes frequency shifting can be obtained.
摘要翻译：通过补偿光子晶体光纤脉冲压缩器中的偏振模色散以及色散，可以从全光纤啁啾脉冲放大系统获得高脉冲能量。通过自相位调制在光纤放大器中产生三阶色散，可以补偿来自大容量光栅脉冲压缩器的三阶色散，可以提高混合光纤/体积啁啾脉冲放大系统的脉冲质量。最后，通过在负色散光纤放大器中正向啁啾脉冲放大，可以获得经过反斯托克斯频移的低噪声波长可调种子源。

15. 发明申请

US20080273558A1 High Power Fiber Chirped Pulse Amplification System Utilizing Telecom-Type Components 失效
标题翻译：高功率光纤啁啾脉冲放大系统利用电信型元件
公开(公告)号：US20080273558A1
公开(公告)日：2008-11-06
申请号：US12171780
申请日：2008-07-11
申请人： Xinhua Gu , Yuzuru Uehara , Donald Harter
发明人： Xinhua Gu , Yuzuru Uehara , Donald Harter
IPC分类号： H01S3/098 , H01S3/10
CPC分类号： H01S3/2333 , H01S3/0057 , H01S3/0085 , H01S3/06725 , H01S3/06754 , H01S3/094003 , H01S3/0941 , H01S3/1608 , H01S3/1618 , H01S3/2316
摘要： An erbium fiber (or erbium-ytterbium) based chirped pulse amplification system is illustrated. The use of fiber amplifiers operating in the telecommunications window enables the implementation of telecommunications components and telecommunications compatible assembly procedures with superior mechanical stability.
摘要翻译：示出了基于铒光纤（或铒 - 镱）的啁啾脉冲放大系统。使用在电信窗口中工作的光纤放大器能够实现具有优良机械稳定性的电信部件和电信兼容组装程序。

16. 发明授权

US07440162B2 High power fiber chirped pulse amplification system utilizing telecom-type components 有权
标题翻译：大功率光纤啁啾脉冲放大系统利用电信型元件
公开(公告)号：US07440162B2
公开(公告)日：2008-10-21
申请号：US11434902
申请日：2006-05-17
申请人： Xinhua Gu , Yuzuru Uehara , Donald Harter
发明人： Xinhua Gu , Yuzuru Uehara , Donald Harter
IPC分类号： H04B10/12 , H01S3/00
CPC分类号： H01S3/2333 , H01S3/0057 , H01S3/0085 , H01S3/06725 , H01S3/06754 , H01S3/094003 , H01S3/0941 , H01S3/1608 , H01S3/1618 , H01S3/2316
摘要： A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example a LiNbO3 modulator, or an electro-absorption modulator. Difficulties related to free-space alignment and operational stability of some prior designs are reduced or eliminated. Fiber coupling generally simplifies beam delivery and alignment. Some embodiments include an erbium fiber (or erbium-ytterbium) based CPA system operating at a wavelength of approximately 1550 nanometers. Similar performance can be obtained at other wavelengths, for example a 1.06 .micrometer Yb-doped fiber system. Moreever, high amplification and peak intensity at the output may be achieved while avoiding non-linear effects in the pulse selector, thereby providing for high intensity picosecond or femtosecond operation.
摘要翻译：具有锁模激光器和高速脉冲选择器的啁啾脉冲放大器（CPA）系统，其中所述脉冲选择器基于所施加的调制电压来调制输出脉冲。脉冲选择器可以是集成电光调制器，例如LiNbO 3调制器或电吸收调制器。减少或消除了一些现有设计中与自由空间对准和操作稳定性相关的困难。光纤耦合通常简化光束传输和对准。一些实施例包括以约1550纳米的波长工作的基于铒光纤（或铒 - 镱）的CPA系统。可以在其他波长下获得类似的性能，例如1.06微米的Yb掺杂的光纤系统。 Moreever可以实现输出端的高放大和峰值强度，同时避免脉冲选择器中的非线性效应，从而提供高强度皮秒或飞秒操作。

17. 发明申请

US20080056656A1 LARGE CORE HOLEY FIBERS 有权
标题翻译：大芯孔纤维
公开(公告)号：US20080056656A1
公开(公告)日：2008-03-06
申请号：US11851270
申请日：2007-09-06
申请人： Liang Dong , Donald Harter , William Wong
发明人： Liang Dong , Donald Harter , William Wong
IPC分类号： G02B6/036 , G02B6/032
CPC分类号： G02B6/032 , G02B6/02009 , G02B6/02047 , G02B6/02328 , G02B6/02338 , G02B6/02342 , G02B6/02357 , G02B6/02361 , G02B6/02366 , G02B6/024 , G02B6/14 , G02B6/32 , H01S3/06716 , H01S3/06729 , H01S3/06733 , H01S3/06741 , H01S3/06754
摘要： Various types of holey fiber provide optical propagation. In various embodiments, for example, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or the hole spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holely fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers. Other embodiments are also provided.
摘要翻译：各种有孔光纤提供光学传播。在各种实施例中，例如，大的核心多孔纤维包括由几个布置成几层的大孔形成的包层区域。可以使用围绕大芯的多个层或多排的孔来粗调基本信号和较高模式的信号的泄漏损耗，从而通过在给定长度的光纤上的泄漏来基本上消除非基本模式。泄漏损失的微调可以通过调整孔尺寸和/或孔间距来实现，以产生所需的基本模式的泄漏损失的操作。与传统单模式的传统纤维和传统纤维相比，所产生的多孔纤维具有较大的孔尺寸和间距，因而具有较大的纤芯。诸如弯曲损耗和模态间隔的其它损耗机制可以用于多孔纤维的选定操作模式。还提供了其他实施例。

18. 发明申请

US20060093291A1 Optical fiber pump multiplexer 有权
标题翻译：光纤泵浦多路复用器
公开(公告)号：US20060093291A1
公开(公告)日：2006-05-04
申请号：US11283701
申请日：2005-11-22
申请人： Liang Dong , Donald Harter
发明人： Liang Dong , Donald Harter
IPC分类号： G02B6/04
CPC分类号： G02B6/2551 , G02B6/2856 , H01S3/06754 , H01S3/094007 , H01S3/094053 , H01S3/09408
摘要： One or more single mode few-moded or multimode fibers are incorporated into a bundle to carry input to a fiber amplifier or output from a fiber amplifier or a fiber laser. The input is at the signal wavelength, which is the wavelength where amplification or lasing occurs. Each of the fibers in the bundle is cleaved individually or as a group and fiber ends are aligned in the same plane. The fiber amplifier or fiber laser may include a double clad fiber and the other fibers of the bundle couple light for cladding pumping. The device may also include a mode filter for controlling the output mode.
摘要翻译：一个或多个单模多模或多模光纤被并入到束中以将输入传送到光纤放大器或从光纤放大器或光纤激光器输出。输入信号波长为发生放大或激光的波长。束中的每个纤维单独地或作为一组裂解，并且纤维末端在同一平面中对准。光纤放大器或光纤激光器可以包括双包层光纤，并且该束的其它光纤耦合光以进行包层泵浦。该装置还可以包括用于控制输出模式的模式滤波器。

19. 发明申请

US20050225846A1 Method and apparatus for controlling and protecting pulsed high power fiber amplifier systems 有权
标题翻译：用于控制和保护脉冲大功率光纤放大器系统的方法和装置
公开(公告)号：US20050225846A1
公开(公告)日：2005-10-13
申请号：US10813173
申请日：2004-03-31
申请人： Salvatore Nati , Otho Ulrich , Gyu Cho , Wayne Gillis , Donald Harter , Mark Bendett , Ingmar Hartl
发明人： Salvatore Nati , Otho Ulrich , Gyu Cho , Wayne Gillis , Donald Harter , Mark Bendett , Ingmar Hartl
IPC分类号： H01S3/067 , H01S3/0941 , H01S3/098 , H01S3/10 , H01S3/105 , H01S3/13 , H01S3/131 , H01S3/23 , H04B10/12
CPC分类号： H01S3/06779 , H01S3/06758 , H01S3/0941 , H01S3/10015 , H01S3/1003 , H01S3/10038 , H01S3/10046 , H01S3/105 , H01S3/1112 , H01S3/1305 , H01S3/1312 , H01S3/1394
摘要： An electronic circuit for controlling a laser system consisting of a pulse source and high power fiber amplifier is disclosed. The circuit is used to control the gain of the high power fiber amplifier system so that the amplified output pulses have predetermined pulse energy as the pulse width and repetition rate of the oscillator are varied. This includes keeping the pulse energy constant when the pulse train is turned on. The circuitry is also used to control the temperature of the high power fiber amplifier pump diode such that the wavelength of the pump diode is held at the optimum absorption wavelength of the fiber amplifier as the diode current is varied. The circuitry also provides a means of protecting the high power fiber amplifier from damage due to a loss of signal from the pulse source or from a pulse-source signal of insufficient injection energy.
摘要翻译：公开了一种用于控制由脉冲源和大功率光纤放大器组成的激光系统的电子电路。该电路用于控制高功率光纤放大器系统的增益，使得放大的输出脉冲具有预定的脉冲能量，因为振荡器的脉冲宽度和重复率是变化的。这包括当脉冲串打开时保持脉冲能量恒定。该电路还用于控制高功率光纤放大器泵浦二极管的温度，使得当二极管电流变化时，泵浦二极管的波长保持在光纤放大器的最佳吸收波长。电路还提供了保护大功率光纤放大器免受来自脉冲源的信号损失或由于注入能量不足的脉冲源信号的损害的手段。

20. 发明申请

US20050111500A1 Utilization of Yb: and Nd: mode-locked oscillators in solid-state short pulse laser systems 有权
标题翻译：在固态短脉冲激光系统中利用Yb：和Nd：锁模振荡器
公开(公告)号：US20050111500A1
公开(公告)日：2005-05-26
申请号：US10960923
申请日：2004-10-12
申请人： Donald Harter , Gyu Cho , Martin Fermann , Ingmar Hartl
发明人： Donald Harter , Gyu Cho , Martin Fermann , Ingmar Hartl
IPC分类号： G02B6/02 , G02F1/35 , G02F1/37 , H01S3/00 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/10 , H01S3/109 , H01S3/16 , H01S3/23 , H01S3/30
CPC分类号： H01S5/5045 , H01S3/005 , H01S3/0057 , H01S3/0078 , H01S3/0085 , H01S3/067 , H01S3/0675 , H01S3/06754 , H01S3/094042 , H01S3/10023 , H01S3/109 , H01S3/1616 , H01S3/1618 , H01S3/1643 , H01S3/235
摘要： An optimized Yb: doped fiber mode-locked oscillator and fiber amplifier system for seeding Nd: or Yb: doped regenerative amplifiers. The pulses are generated in the Yb: or Nd: doped fiber mode-locked oscillator, and may undergo spectral narrowing or broadening, wavelength converting, temporal pulse compression or stretching, pulse attenuation and/or lowering the repetition rate of the pulse train. The conditioned pulses are subsequently coupled into an Yb: or Nd: fiber amplifier. The amplified pulses are stretched before amplification in the regenerative amplifier that is based on an Nd: or Yb: doped solid-state laser material, and then recompressed for output.
摘要翻译：一种优化的Yb：掺杂光纤锁模振荡器和光纤放大器系统，用于种子Nd：或Yb：掺杂再生放大器。脉冲在Yb或Nd：掺杂光纤锁模振荡器中产生，并可能经历频谱变窄或变宽，波长转换，时间脉冲压缩或拉伸，脉冲衰减和/或降低脉冲序列的重复率。调节脉冲随后耦合到Yb或Nd：光纤放大器中。在基于Nd：或Yb：掺杂的固态激光材料的再生放大器中，放大后的放大脉冲被拉伸，然后再压缩输出。

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