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    • 7. 发明申请
      US20070103765A1 Modular, high energy, widely-tunable ultrafast fiber source 有权
    • Modular, high energy, widely-tunable ultrafast fiber source
    • US20070103765A1
    • 2007-05-10
    • US11643765
    • 2006-12-22
    • Martin Fermann , Almantas Galvanauskas , Donald Harter
    • Martin Fermann , Almantas Galvanauskas , Donald Harter
    • H01S3/00
    • H01S3/1115 , H01S3/0057 , H01S3/0675 , H01S3/06754 , H01S3/094019 , H01S3/094042 , H01S3/109 , H01S3/1112 , H01S3/1616 , H01S3/1618 , H01S3/302
    • 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.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 9. 发明申请
      US20050243409A1 Microchip - Yb fiber hybrid optical amplifier for micro-machining and marking 有权
    • Microchip - Yb fiber hybrid optical amplifier for micro-machining and marking
    • Microchip - Yb光纤混合光放大器用于微加工和标记
    • US20050243409A1
    • 2005-11-03
    • US11141704
    • 2005-06-01
    • Donald Harter , Martin Fermann
    • Donald Harter , Martin Fermann
    • H01S3/06 , H01S3/067 , H01S3/094 , H01S3/10 , H01S3/11 , H01S3/16 , H01S3/30
    • 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
    • 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.
    • 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。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 10. 发明申请
      US20050163426A1 Modular, high energy, widely-tunable ultrafast fiber source 有权
    • Modular, high energy, widely-tunable ultrafast fiber source
    • US20050163426A1
    • 2005-07-28
    • US11074765
    • 2005-03-09
    • Martin Fermann , Almantas Galvanauskas , Donald Harter
    • Martin Fermann , Almantas Galvanauskas , Donald Harter
    • 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
    • H01S3/1115 , H01S3/0057 , H01S3/0675 , H01S3/06754 , H01S3/094019 , H01S3/094042 , H01S3/109 , H01S3/1112 , H01S3/1616 , H01S3/1618 , H01S3/302
    • 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.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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