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    Microchip-Yb fiber hybrid optical amplifier for micro-machining and marking
    2.
    发明申请
    Microchip-Yb fiber hybrid optical amplifier for micro-machining and marking 有权
    用于微加工和标记的Microchip-Yb光纤混合光放大器

    公开(公告)号：US20060132904A1

    公开(公告)日：2006-06-22

    申请号：US11339679

    申请日：2006-01-26

    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： H01S3/0627 ,  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。

    Microchip - Yb fiber hybrid optical amplifier for micro-machining and marking
    3.
    发明申请
    Microchip - Yb fiber hybrid optical amplifier for micro-machining and marking 有权
    Microchip - Yb光纤混合光放大器用于微加工和标记

    公开(公告)号：US20070109629A1

    公开(公告)日：2007-05-17

    申请号：US11643760

    申请日：2006-12-22

    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： H01S3/0627 ,  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。

    Modular, high energy, widely-tunable ultrafast fiber source
    5.
    发明申请
    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.

    Modular, high energy, widely-tunable ultrafast fiber source
    6.
    发明申请
    Modular, high energy, widely-tunable ultrafast fiber source 有权

    公开(公告)号：US20050163426A1

    公开(公告)日：2005-07-28

    申请号：US11074765

    申请日：2005-03-09

    申请人： Martin Fermann ,  Almantas Galvanauskas ,  Donald Harter

    发明人： Martin Fermann ,  Almantas Galvanauskas ,  Donald Harter

    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 ,  G02B6/34

    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.

    Quasi-phase-matched parametric chirped pulse amplification systems
    7.
    发明授权
    Quasi-phase-matched parametric chirped pulse amplification systems 失效
    准相位匹配参数啁啾脉冲放大系统

    公开(公告)号：US06208458B1

    公开(公告)日：2001-03-27

    申请号：US09116241

    申请日：1998-07-16

    申请人： Almantas Galvanauskas ,  Donald Harter ,  Gregg Sucha

    发明人： Almantas Galvanauskas ,  Donald Harter ,  Gregg Sucha

    IPC分类号： H01S310

    CPC分类号： G02F1/39 ,  A61B18/22 ,  A61C1/0046 ,  B23K26/0624 ,  B23K26/40 ,  B23K2101/40 ,  B23K2103/50 ,  G02F2001/3548 ,  G02F2001/392 ,  H01S3/0057 ,  H01S3/0604 ,  H01S3/115

    摘要： Use of quasi-phase-matched (QPM) materials for parametric chirped pulse amplification (PCPA) substantially reduces the required pump peak power and pump brightness, allowing exploitation of spatially-multimode and long duration pump pulses. It also removes restrictions on pump wavelength and amplification bandwidth. This allows substantial simplification in pump laser design for a high-energy PCPA system and, consequently, the construction of compact diode-pumped sources of high-energy ultrashort optical pulses. Also, this allows elimination of gain-narrowing and phase-distortion limitations on minimum pulse duration, which typically arise in a chirped pulse amplification system. One example of a compact source of high-energy ultrashort pulses is a multimode-core fiber based PCPA system. Limitations on pulse energy due to the limited core size for single-mode fibers are circumvented by using large multimode core. Limitations on pulse duration and beam quality due to multimode core are circumvented by using a PCPA scheme. Additionally, the large core of the multimode fiber facilitates cladding-pumping by inexpensive and high-power multiple-mode laser diodes.

    摘要翻译： 使用准相位匹配（QPM）材料进行参数啁啾脉冲放大（PCPA）大大降低了所需的泵浦峰值功率和泵浦亮度，从而允许利用空间多模和长持续时间的泵浦脉冲。 它还消除了对泵浦波长和放大带宽的限制。 这大大简化了用于高能量PCPA系统的泵浦激光器设计，并因此实现了高能量超短脉冲光源的紧凑型二极管泵浦源的构建。 此外，这允许消除通常在啁啾脉冲放大系统中出现的最小脉冲持续时间上的增益变窄和相位失真的限制。 紧凑型高能超短脉冲源的一个例子是基于多模核心光纤的PCPA系统。 通过使用大型多模核，可以避免由于单模光纤尺寸有限引起的脉冲能量限制。 通过使用PCPA方案可以避免由多模核引起的脉冲持续时间和光束质量的限制。 此外，多模光纤的大芯片有助于通过廉价和大功率多模激光二极管进行包层泵浦。

    Quasi-phase-matched parametric chirped pulse amplification systems
    8.
    再颁专利
    Quasi-phase-matched parametric chirped pulse amplification systems 有权
    准相位匹配参数啁啾脉冲放大系统

    公开(公告)号：USRE45177E1

    公开(公告)日：2014-10-07

    申请号：US10396815

    申请日：2003-03-26

    申请人： Almantas Galvanauskas ,  Donald Harter ,  Gregg Sucha

    发明人： Almantas Galvanauskas ,  Donald Harter ,  Gregg Sucha

    IPC分类号： H01S3/10 ,  H01S3/091

    CPC分类号： G02F1/39 ,  A61B18/22 ,  A61C1/0046 ,  B23K26/0624 ,  G02F2001/3548 ,  G02F2001/392 ,  H01S3/0057 ,  H01S3/0604 ,  H01S3/115

    摘要： Use of quasi-phase-matched (QPM) materials for parametric chirped pulse amplification (PCPA) substantially reduces the required pump peak power and pump brightness, allowing exploitation of spatially-multimode and long duration pump pulses. It also removes restrictions on pump wavelength and amplification bandwidth. This allows substantial simplification in pump laser design for a high-energy PCPA system and, consequently, the construction of compact diode-pumped sources of high-energy ultrashort optical pulses. Also, this allows elimination of gain-narrowing and phase-distortion limitations on minimum pulse duration, which typically arise in a chirped pulse amplification system. One example of a compact source of high-energy ultrashort pulses is a multimode-core fiber based PCPA system. Limitations on pulse energy due to the limited core size for single-mode fibers are circumvented by using large multimode core. Limitations on pulse duration and beam quality due to multimode core are circumvented by using a PCPA scheme. Additionally, the large core of the multimode fiber facilitates cladding-pumping by inexpensive and high-power multiple-mode laser diodes.

    摘要翻译： 使用准相位匹配（QPM）材料进行参数啁啾脉冲放大（PCPA），大大降低了所需的泵浦峰值功率和泵浦亮度，从而允许利用空间多模和长时间泵浦脉冲。 它还消除了对泵浦波长和放大带宽的限制。 这大大简化了用于高能量PCPA系统的泵浦激光器设计，并因此实现了高能量超短脉冲光源的紧凑型二极管泵浦源的构建。 此外，这允许消除通常在啁啾脉冲放大系统中出现的最小脉冲持续时间上的增益变窄和相位失真的限制。 紧凑型高能超短脉冲源的一个例子是基于多模核心光纤的PCPA系统。 通过使用大型多模核，可以避免由于单模光纤尺寸有限引起的脉冲能量限制。 通过使用PCPA方案可以避免由多模核引起的脉冲持续时间和光束质量的限制。 此外，多模光纤的大芯片有助于通过廉价和大功率多模激光二极管进行包层泵浦。

    Microchip - Yb fiber hybrid optical amplifier for micro-machining and marking
    9.
    发明申请
    Microchip - Yb fiber hybrid optical amplifier for micro-machining and marking 有权
    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。