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    APPARATUS AND METHODS FOR CONTROLLING CARRIER ENVELOPE PHASE OF LOW REPETITION RATE PULSES
    1.
    发明申请
    APPARATUS AND METHODS FOR CONTROLLING CARRIER ENVELOPE PHASE OF LOW REPETITION RATE PULSES 有权
    用于控制低重复速率脉冲载波相位的装置和方法

    公开(公告)号：US20150188275A1

    公开(公告)日：2015-07-02

    申请号：US14583904

    申请日：2014-12-29

    申请人： University of Central Florida Research Foundation Inc.

    发明人： Zenghu Chang ,  Yi Wu ,  Eric Cunningham

    IPC分类号： H01S3/00

    CPC分类号： H01S3/0057 ,  H01S3/0085 ,  H01S3/1307 ,  H01S3/2316

    摘要： The carrier-envelope phase (CEP) of a laser pulse has been shown to influence many physical processes such as pulse propagation through polar molecules, cross-phase modulation, ponderomotive surface-plasmon electron acceleration, photoemission from metallic surfaces, terahertz emission from the laser breakdown of air, above-threshold ionization, high harmonic generation, and attosecond pulse generation. Current technology does not allow for the CEP stabilization of chirped pulse amplification (CPA) systems operating at a repetition rate much lower than a kHz. The inventors disclose apparatus and methods that enable CEP control in CPA systems operating at arbitrarily-low repetition rates.

    摘要翻译： 激光脉冲的载波包络相位（CEP）已经显示出影响许多物理过程，例如通过极性分子的脉冲传播，交叉相位调制，机车表面等离子体激元电子加速度，金属表面的光电子发射，激光的太赫兹发射 空气破坏，高于阈值电离，高谐波产生和阿秒脉冲产生。 目前的技术不允许CEP稳定的啁啾脉冲放大（CPA）系统以比kHz低得多的重复频率工作。 本发明人公开了能够以任意低重复率操作的CPA系统中实现CEP控制的装置和方法。

    Apparatus and Method for Suppressing Parasitic Lasing and Applications Thereof
    2.
    发明申请
    Apparatus and Method for Suppressing Parasitic Lasing and Applications Thereof 有权
    抑制寄生激光的设备和方法及其应用

    公开(公告)号：US20170040767A1

    公开(公告)日：2017-02-09

    申请号：US14816166

    申请日：2015-08-03

    申请人： University of Central Florida Research Foundation, Inc.

    发明人： Zenghu Chang ,  Yi Wu ,  Eric Cunningham

    IPC分类号： H01S3/06 ,  H01S3/02 ,  H01S3/16

    CPC分类号： H01S5/1078 ,  H01S3/025 ,  H01S3/0405 ,  H01S3/042 ,  H01S3/0604 ,  H01S3/061 ,  H01S3/1625 ,  H01S3/1636 ,  H01S5/0226 ,  H01S2301/02

    摘要： Apparatus and methods that enable the suppression of amplified spontaneous emission (ASE) and prevention against parasitic lasing in cryogenically-cooled laser amplifier systems, thus allowing sustainable extraction efficiency when increasing the pump power and suitable for large-scale, high average-power laser systems employing large-aperture gain media. A gain medium having a known index of refraction for operation in an evacuated, cryogenic environment includes an ASE-absorbing epoxy composition on the perimetrical edge of the gain medium, wherein the epoxy composition has an index of refraction that substantially matches the index of refraction of the gain medium.

    摘要翻译： 能够抑制放大的自发发射（ASE）和防止低温冷却激光放大器系统中的寄生激光的装置和方法，从而在增加泵浦功率并且适用于大规模，高平均功率的激光系统时可提供可持续的提取效率 采用大口径增益介质。 具有用于在抽真空的低温环境中操作的已知折射率的增益介质包括在增益介质的周边边缘上的ASE-吸收性环氧组合物，其中环氧组合物具有与折射率基本匹配的折射率 增益介质。

    Multi-millijoule holmium laser system
    3.
    发明授权
    Multi-millijoule holmium laser system 有权

    公开(公告)号：US11223179B1

    公开(公告)日：2022-01-11

    申请号：US16687333

    申请日：2019-11-18

    申请人： University of Central Florida Research Foundation, Inc.

    发明人： Krishna Murari ,  Yanchun Yin ,  Fangjie Zhou ,  Yi Wu ,  Zenghu Chang

    IPC分类号： H01S3/23 ,  H01S3/00 ,  H01S3/094 ,  H01S3/16

    摘要： A laser system may include a seed laser formed from a Ti:Sapphire laser providing pulsed light and an optical parametric amplifier to generate pulsed light within a Holmium emission spectrum as seed pulses in response to the pulsed light from the Ti:Sapphire laser. A laser system may further include an amplifier to generate amplified pulses of light in response to the seed pulses from the seed laser, where the amplified pulses include at least some of the seed pulses amplified by the one or more Holmium-doped gain media pumped by the one or more pump lasers. The amplifier may include one or more Holmium-doped gain media and one or more pump lasers providing continuous-wave pump light within an absorption spectrum of the one or more Holmium-doped gain media.

    Apparatus and methods for controlling carrier envelope phase of low repetition rate pulses
    4.
    发明授权
    Apparatus and methods for controlling carrier envelope phase of low repetition rate pulses 有权
    用于控制低重复率脉冲载波包络相位的装置和方法

    公开(公告)号：US09225137B2

    公开(公告)日：2015-12-29

    申请号：US14583904

    申请日：2014-12-29

    申请人： University of Central Florida Research Foundation Inc.

    发明人： Zenghu Chang ,  Yi Wu ,  Eric Cunningham

    IPC分类号： H01S3/13 ,  H01S3/23 ,  H01S3/00

    CPC分类号： H01S3/0057 ,  H01S3/0085 ,  H01S3/1307 ,  H01S3/2316

    摘要： The carrier-envelope phase (CEP) of a laser pulse has been shown to influence many physical processes such as pulse propagation through polar molecules, cross-phase modulation, ponderomotive surface-plasmon electron acceleration, photoemission from metallic surfaces, terahertz emission from the laser breakdown of air, above-threshold ionization, high harmonic generation, and attosecond pulse generation. Current technology does not allow for the CEP stabilization of chirped pulse amplification (CPA) systems operating at a repetition rate much lower than a kHz. The inventors disclose apparatus and methods that enable CEP control in CPA systems operating at arbitrarily-low repetition rates.

    摘要翻译： 激光脉冲的载波包络相位（CEP）已经显示出影响许多物理过程，例如通过极性分子的脉冲传播，交叉相位调制，机车表面等离子体激元电子加速度，金属表面的光电子发射，激光的太赫兹发射 空气破坏，高于阈值电离，高谐波产生和阿秒脉冲产生。 目前的技术不允许CEP稳定的啁啾脉冲放大（CPA）系统以比kHz低得多的重复频率工作。 本发明人公开了能够以任意低重复率操作的CPA系统中实现CEP控制的装置和方法。

    High energy broadband laser system, methods, and applications
    7.
    发明授权
    High energy broadband laser system, methods, and applications 有权

    公开(公告)号：US10790631B2

    公开(公告)日：2020-09-29

    申请号：US16032808

    申请日：2018-07-11

    申请人： UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.

    发明人： Zenghu Chang ,  Xiaoming Ren ,  Yanchun Yin ,  Lam Mach

    IPC分类号： H01S3/00 ,  H01S3/23 ,  H01S3/16 ,  H01S3/115 ,  H01S3/06 ,  H01S3/094

    摘要： The present invention demonstrates a technique for achieving milli-joule level and higher energy, broad bandwidth laser pulses centered around 2.4 micrometer with a kilohertz and other repetition rate. The key to such technique is to start with a broadband micro-joule level seed laser at around 2.4 micrometer, which could be generated through difference frequency generation, four-wave mixing process and other methods. This micro-joule level seed laser could then be amplified to above one milli-joule through chirped pulse amplification in a Cr2+:ZnSe or Cr2+:ZnS crystal pumped by a commercially available Ho:YAG or other appropriate suitable lasers. Due to the high seed energy, fewer gain passes are needed to achieve a milli-joule level output thus significantly simplifies laser architectures. Furthermore, gain narrowing effect in a typical chirped pulse amplifier is also mitigated and thus enable a broadband output.