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    Compact coherent high brightness light source for the mid-IR and far IR
    71.
    发明授权
    Compact coherent high brightness light source for the mid-IR and far IR 有权
    紧凑型相干高亮度光源，适用于中红外和远红外

    公开(公告)号：US09184549B2

    公开(公告)日：2015-11-10

    申请号：US14508056

    申请日：2014-10-07

    Applicant: IMRA AMERICA, INC.

    Inventor： Martin E. Fermann ,  Ingmar Hartl

    IPC: H01S3/30 ,  H01S3/00 ,  H01S3/094 ,  H01S3/11 ,  H01S3/109 ,  H01S3/067 ,  G02F1/35 ,  G02B6/02 ,  G02F1/365

    CPC classification number: H01S3/0092 ,  G02B6/02038 ,  G02F1/3534 ,  G02F1/365 ,  G02F2001/3528 ,  H01S3/067 ,  H01S3/06725 ,  H01S3/094046 ,  H01S3/109 ,  H01S3/1106 ,  H01S3/30 ,  H01S3/302

    Abstract: Compact laser systems are disclosed which include ultrafast laser sources in combination with nonlinear crystals or waveguides. In some implementations fiber based mid-IR sources producing very short pulses and/or mid-IR sources based on a mode locked fiber lasers are utilized. A difference frequency generator receives outputs from the ultrafast sources, and generates an output including a difference frequency. The output power from the difference frequency generator can further be enhanced via the implementation of large core dispersion shifted fibers. Exemplary applications of the compact, high brightness mid-IR light sources include medical applications, spectroscopy, ranging, sensing and metrology.

    Abstract translation: 公开了紧凑的激光系统，其包括与非线性晶体或波导组合的超快激光源。 在一些实现中，利用基于模式锁定光纤激光器产生非常短脉冲和/或中红外光源的基于光纤的中红外光源。 差频发生器接收来自超快源的输出，并产生包括差频的输出。 来自差分频率发生器的输出功率可以通过实施大型核心色散位移光纤进一步提高。 紧凑的高亮度中红外光源的示例性应用包括医疗应用，光谱学，测距，感测和计量学。

    High power short pulse fiber laser
    72.
    发明授权
    High power short pulse fiber laser 有权
    大功率短脉冲光纤激光器

    公开(公告)号：US09071037B2

    公开(公告)日：2015-06-30

    申请号：US14012508

    申请日：2013-08-28

    Applicant: IMRA America, Inc.

    Inventor： Xinhua Gu ,  Mark Bendett ,  Gyu Cheon Cho ,  Martin E. Fermann

    IPC: H01S3/30 ,  H01S3/067 ,  H01S3/11

    CPC classification number: H01S3/1115 ,  H01S3/0057 ,  H01S3/0064 ,  H01S3/0078 ,  H01S3/06712 ,  H01S3/06741 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094042 ,  H01S3/0941 ,  H01S3/1028 ,  H01S3/1305 ,  H01S3/1618 ,  H01S3/1698

    Abstract: A pulsed laser comprises an oscillator and amplifier. An attenuator and/or pre-compressor may be disposed between the oscillator and amplifier to improve performance and possibly the quality of pulses output from the laser. Such pre-compression may be implemented with spectral filters and/or dispersive elements between the oscillator and amplifier. The pulsed laser may have a modular design comprising modular devices that may have Telcordia-graded quality and reliability. Fiber pigtails extending from the device modules can be spliced together to form laser system. In one embodiment, a laser system operating at approximately 1050 nm comprises an oscillator having a spectral bandwidth of approximately 19 nm. This oscillator signal can be manipulated to generate a pulse having a width below approximately 90 fs. A modelocked linear fiber laser cavity with enhanced pulse-width control includes concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers are included in the cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth are obtained by matching the dispersion value of the fiber Bragg grating to the inverse of the dispersion of the intra-cavity fiber.

    Abstract translation: 脉冲激光器包括振荡器和放大器。 衰减器和/或预压缩器可以设置在振荡器和放大器之间以提高性能以及可能的从激光器输出的脉冲的质量。 这种预压缩可以用振荡器和放大器之间的频谱滤波器和/或分散元件来实现。 脉冲激光器可以具有包括可能具有Telcordia分级质量和可靠性的模块化设备的模块化设计。 从设备模块延伸的光纤尾纤可以拼接在一起形成激光系统。 在一个实施例中，在大约1050nm操作的激光系统包括具有约19nm的光谱带宽的振荡器。 该振荡器信号可被操纵以产生宽度低于大约90fs的脉冲。 具有增强的脉冲宽度控制的锁模线性光纤激光腔包括两个偏振保持和非偏振保持光纤的级联部分。 变形纤维布拉格光栅和集成光纤偏振器被包括在空腔中，以帮助线性偏振空腔的输出。 通过将光纤布拉格光栅的色散值与腔内光纤的色散相反来获得具有大光学带宽的非常短的脉冲。

    PULSED LASER SOURCES
    75.
    发明申请
    PULSED LASER SOURCES 审中-公开
    脉冲激光源

    公开(公告)号：US20140233089A1

    公开(公告)日：2014-08-21

    申请号：US14090374

    申请日：2013-11-26

    Applicant: IMRA America, Inc.

    Inventor： Martin E. Fermann ,  Ingmar Hartl ,  Gennady Imeshev

    IPC: H01S3/067 ,  H01S3/10

    CPC classification number: H01S3/0057 ,  G02F1/3517 ,  G02F2001/3528 ,  H01S3/0078 ,  H01S3/0092 ,  H01S3/067 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094042 ,  H01S3/10 ,  H01S3/105 ,  H01S3/1053 ,  H01S3/106 ,  H01S3/1067 ,  H01S3/109 ,  H01S3/1106 ,  H01S3/1118 ,  H01S3/1616

    Abstract: Modelocked fiber laser resonators may be coupled with optical amplifiers. An isolator optionally may separate the resonator from the amplifier. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the resonator to the amplifier. Enhanced pulse-width control may be provided with concatenated sections of both polarization-maintaining and non-polarization-maintaining fibers. Apodized fiber Bragg gratings and integrated fiber polarizers may also be included in the laser cavity to assist in linearly polarizing the output of the cavity. Very short pulses with a large optical bandwidth may be obtained by matching the dispersion value of the grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. Low dispersion and an in-line interferometer that provides feedback may assist in controlling the frequency components output from the comb source.

    Abstract translation: 模式锁定光纤激光谐振器可以与光放大器耦合。 隔离器可选地可以将谐振器与放大器分离。 可以采用具有相对低的反射率的谐振器的一端上的反射光学元件来将来自谐振器的光耦合到放大器。 可以提供增强的脉冲宽度控制，其具有两个偏振保持和非偏振保持光纤的级联部分。 变形光纤布拉格光栅和集成光纤偏振器也可以包括在激光腔中，以帮助线性偏振空腔的输出。 可以通过将光栅的色散值与腔内光纤的色散相反来获得具有大的光学带宽的非常短的脉冲。 频率梳源可以由这种锁模光纤振荡器构成。 提供反馈的低色散和在线干涉仪可以有助于控制从梳状源输出的频率分量。

    Optical scanning and imaging systems based on dual pulsed laser systems
    76.
    发明授权
    Optical scanning and imaging systems based on dual pulsed laser systems 失效
    基于双脉冲激光系统的光学扫描和成像系统

    公开(公告)号：US08699532B2

    公开(公告)日：2014-04-15

    申请号：US13754491

    申请日：2013-01-30

    Applicant: IMRA America, Inc.

    Inventor： Martin E. Fermann ,  Ingmar Hartl

    IPC: H01S3/098 ,  H01S3/10

    CPC classification number: H01S3/10046 ,  G01B9/02001 ,  G01N21/31 ,  G01N2021/317 ,  G02B6/02304 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/08054 ,  H01S3/1067 ,  H01S3/1068 ,  H01S3/11 ,  H01S3/1115 ,  H01S3/13 ,  H01S3/1307 ,  H01S3/1392 ,  H01S3/1394 ,  H01S3/2383

    Abstract: The invention relates to scanning pulsed laser systems for optical imaging. Coherent dual scanning laser systems (CDSL) are disclosed and some applications thereof. Various alternatives for implementation are illustrated, including highly integrated configurations. In at least one embodiment a coherent dual scanning laser system (CDSL) includes two passively modelocked fiber oscillators. The oscillators are configured to operate at slightly different repetition rates, such that a difference δfr in repetition rates is small compared to the values fr1 and fr2 of the repetition rates of the oscillators. The CDSL system also includes a non-linear frequency conversion section optically connected to each oscillator. The section includes a non-linear optical element generating a frequency converted spectral output having a spectral bandwidth and a frequency comb comprising harmonics of the oscillator repetition rates. A CDSL may be arranged in an imaging system for one or more of optical imaging, microscopy, micro-spectroscopy and/or THz imaging.

    Abstract translation: 本发明涉及用于光学成像的扫描脉冲激光系统。 公开了相干双扫描激光系统（CDSL）及其一些应用。 示出了用于实现的各种替代方案，包括高度集成的配置。 在至少一个实施例中，相干双扫描激光系统（CDSL）包括两个被动锁模光纤振荡器。 振荡器被配置为以稍微不同的重复率操作，使得与振荡器的重复率的值fr1和fr2相比，重复率的差δfr小。 CDSL系统还包括与每个振荡器光学连接的非线性频率转换部分。 该部分包括产生具有频谱带宽的频率转换频谱输出和包括振荡器重复频率的谐波的频率梳的非线性光学元件。 可以在成像系统中布置CDSL以用于光学成像，显微镜，微光谱和/或THz成像中的一种或多种。

    ULTRASHORT LASER MICRO-TEXTURE PRINTING
    77.
    发明申请
    ULTRASHORT LASER MICRO-TEXTURE PRINTING 有权

    公开(公告)号：US20130194592A1

    公开(公告)日：2013-08-01

    申请号：US13799754

    申请日：2013-03-13

    Applicant: IMRA AMERICA, INC.

    Inventor： Lawrence Shah ,  Martin E. Fermann

    IPC: G06K15/12

    CPC classification number: G06K15/1209 ,  B41J2/442 ,  B41J2/471 ,  G06K15/129 ,  H04N1/40037 ,  H04N1/407

    Abstract: Systems and methods for providing laser texturing of solid substrates are disclosed. The texturing may be used to provide grayscale images obtainable from substrates, which may include steel, aluminum, glass, and silicon. In some embodiments, images may be obtainable from the substrate by modifying the reflective, diffractive, and/or absorptive features of the substrate or the substrate surface by forming random, periodic, and/or semi-periodic micro-structure features on the substrate (or substrate surface) by an ultrafast laser pulse train. The ultrafast pulse train may be modulated in order to vary, for example, optical exposure time, pulse train intensity, laser polarization, laser wavelength, or a combination of the aforementioned. The ultrafast pulse train and the substrate may be scanned with respect to each other to provide different optical energies to different regions of the substrate (or substrate surface). In some embodiments, the image is provided by making one or more passes of the ultrafast laser pulse train relative to the substrate.

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