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    Compact, coherent, high brightness light sources for the mid and far IR
    12.
    发明授权
    Compact, coherent, high brightness light sources for the mid and far IR 有权
    紧凑，连贯，高亮度的光源，适用于中远红外线

    公开(公告)号：US09252554B2

    公开(公告)日：2016-02-02

    申请号：US14221704

    申请日：2014-03-21

    Applicant: IMRA AMERICA, INC.

    Inventor： Martin E. Fermann

    IPC: H01S3/067 ,  H01S3/11 ,  B23K26/00 ,  H01S3/10 ,  H01S3/16

    CPC classification number: H01S3/06725 ,  B23K26/352 ,  B23K26/361 ,  B23K26/362 ,  H01S3/06712 ,  H01S3/06741 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/10015 ,  H01S3/10092 ,  H01S3/1112 ,  H01S3/1118 ,  H01S3/1608 ,  H01S3/1616

    Abstract: Compact high brightness light sources for the mid and far IR spectral region, and exemplary applications are disclosed based on passively mode locked Tm fiber comb lasers. In at least one embodiment the coherence of the comb sources is increased in a system utilizing an amplified single-frequency laser to pump the Tm fiber comb laser. The optical bandwidth generated by the passively mode locked Tm fiber comb laser is further decreased by using simultaneous 2nd and 3rd order dispersion compensation using either appropriate chirped fiber Bragg gratings for dispersion compensation, or fibers with appropriately selected values of 2nd and 3rd order dispersion. Fibers with large anomalous values of third order dispersion, or fibers with large numerical apertures, for example fibers having air-holes formed in the fiber cladding may be utilized.

    Abstract translation: 基于被动模式锁定的Tm光纤梳状激光器公开了用于中红外光谱区域和远红外光谱区域的紧凑型高亮度光源，以及示例性应用。 在至少一个实施例中，在利用放大的单频激光器来泵浦Tm纤维梳状激光器的系统中，梳状源的相干性增加。 通过使用用于色散补偿的适当的啁啾光纤布拉格光栅或具有适当选择的二阶和三阶色散值的光纤，通过使用同时的二次和三阶色散补偿来进一步减少由被动模式锁定的Tm光纤梳状激光器产生的光学带宽。 可以使用具有三阶分散的大异常值的纤维或具有大数值孔径的纤维，例如在纤维包层中形成具有空气孔的纤维。

    Optical parametric amplification, optical parametric generation, and optical pumping in optical fibers systems
    13.
    发明授权
    Optical parametric amplification, optical parametric generation, and optical pumping in optical fibers systems 有权
    光学参数放大，光学参数生成和光纤系统中的光泵浦

    公开(公告)号：US09209592B2

    公开(公告)日：2015-12-08

    申请号：US13714840

    申请日：2012-12-14

    Applicant: IMRA America, Inc.

    Inventor： Gennady Imeshev ,  Martin E. Fermann

    IPC: H01S3/30 ,  H01S3/10 ,  G02F1/355 ,  G02F1/39 ,  H01S3/0941 ,  H01S3/08 ,  H01S3/00 ,  H01S3/067 ,  H01S3/109 ,  H01S3/16

    CPC classification number: H01S3/10015 ,  G02F1/3558 ,  G02F1/39 ,  G02F2001/392 ,  G02F2203/26 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/06708 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/08013 ,  H01S3/0941 ,  H01S3/10092 ,  H01S3/109 ,  H01S3/1608 ,  H01S3/1616 ,  H01S3/302

    Abstract: Embodiments described herein include a system for producing ultrashort tunable pulses based on ultra broadband OPA or OPG in nonlinear materials. The system parameters such as the nonlinear material, pump wavelengths, quasi-phase matching periods, and temperatures can be selected to utilize the intrinsic dispersion relations for such material to produce bandwidth limited or nearly bandwidth limited pulse compression. Compact high average power sources of short optical pulses tunable in the wavelength range of 1800 to 2100 nm and after frequency doubling in the wavelength range of 900 to 1050 nm can be used as a pump for the ultra broadband OPA or OPG. In certain embodiments, these short pump pulses are obtained from an Er fiber oscillator at about 1550 nm, amplified in Er fiber, Raman-shifted to 1800 to 2100 nm, stretched in a fiber stretcher, and amplified in Tm-doped fiber.

    Abstract translation: 本文描述的实施例包括用于在非线性材料中基于超宽带OPA或OPG产生超短可调脉冲的系统。 可以选择诸如非线性材料，泵浦波长，准相位匹配周期和温度之类的系统参数以利用这种材料的固有色散关系来产生带宽限制或几乎带宽限制的脉冲压缩。 可在1800至2100 nm的波长范围内调谐的短光脉冲的紧凑型高平均电源，在900至1050 nm的波长范围内倍频后可用作超宽带OPA或OPG的泵。 在某些实施例中，这些短泵浦脉冲从大约1550nm的Er光纤振荡器获得，在Er光纤中被放大，拉曼偏移到1800-2100nm，在纤维拉伸器中拉伸，并且在掺杂Tm的光纤中进行放大。

    GLASS LARGE-CORE OPTICAL FIBERS
    15.
    发明申请
    GLASS LARGE-CORE OPTICAL FIBERS 有权
    玻璃大芯光纤光纤

    公开(公告)号：US20150241628A1

    公开(公告)日：2015-08-27

    申请号：US14644779

    申请日：2015-03-11

    Applicant: IMRA America, Inc.

    Inventor： Liang Dong ,  Jun Li ,  Hugh McKay ,  Libin Fu ,  Andrius Marcinkevicius

    IPC: G02B6/028 ,  H01S3/091 ,  H01S3/11 ,  H01S3/067

    CPC classification number: G02B6/0288 ,  G02B6/02009 ,  G02B6/02333 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/02371 ,  G02B6/0283 ,  G02B6/14 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/091 ,  H01S3/11

    Abstract: Embodiments of optical fiber may include cladding features that include a material (e.g., fluorine-doped silica glass) that may produce a very low relative refractive index difference with respect to cladding material in which the cladding features are disposed. This relative refractive index difference may be characterized by (n1−n2)/n1, where n1 is the index of refraction of the cladding material in which the cladding features are included, and n2 is the index of refraction of the cladding features. In certain embodiments, the relative refractive index difference may be less than about 4.5×10−3. In various embodiments, the configuration of the cladding features including, for example, the size and spacing of the cladding features, can be selected to provide for confinement of the fundamental mode yet leakage for the second mode and higher modes, which may provide mode filtering, single mode propagation, and/or low bend loss.

    Abstract translation: 光纤的实施例可以包括包括材料（例如氟掺杂石英玻璃）的包层特征，其可以产生相对于其中设置包层特征的包层材料的非常低的相对折射率差。 该相对折射率差可以由（n1-n2）/ n1表征，其中n1是其中包含包层特征的包层材料的折射率，n2是包层特征的折射率。 在某些实施方案中，相对折射率差可以小于约4.5×10 -3。 在各种实施例中，可以选择包括例如包层特征的尺寸和间隔的包层特征的配置，以提供用于第二模式和更高模式的基模模式的限制，而这可以提供模式滤波 ，单模传播和/或低弯曲损耗。

    Ultrashort laser micro-texture printing
    18.
    发明授权
    Ultrashort laser micro-texture printing 有权
    超短激光微纹理印刷

    公开(公告)号：US08995029B2

    公开(公告)日：2015-03-31

    申请号：US14198434

    申请日：2014-03-05

    Applicant: IMRA America, inc.

    Inventor： Lawrence Shah ,  Martin E. Fermann

    IPC: H04N1/04 ,  G06K15/12 ,  B41J2/44 ,  B41J2/47 ,  H04N1/40 ,  H04N1/407

    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.

    Abstract translation: 公开了用于提供固体基底的激光纹理化的系统和方法。 纹理可以用于提供可从包括钢，铝，玻璃和硅的基底获得的灰度图像。 在一些实施例中，可以通过在衬底上形成随机，周期性和/或半周期微结构特征来修改衬底或衬底表面的反射，衍射和/或吸收特征，从衬底获得图像（ 或基板表面）。 为了改变例如光学曝光时间，脉冲串强度，激光偏振，激光波长或上述的组合，可以调制超快脉冲串。 可以相对于彼此扫描超快速脉冲串和衬底，以向衬底（或衬底表面）的不同区域提供不同的光学能量。 在一些实施例中，通过相对于衬底进行超快激光脉冲串的一次或多次通过来提供图像。

    NOISE DETECTION, DIAGNOSTICS, AND CONTROL OF MODELOCKED LASERS
    19.
    发明申请
    NOISE DETECTION, DIAGNOSTICS, AND CONTROL OF MODELOCKED LASERS 审中-公开
    噪声检测，诊断和模拟激光器的控制

    公开(公告)号：US20150030045A1

    公开(公告)日：2015-01-29

    申请号：US14484699

    申请日：2014-09-12

    Applicant: IMRA AMERICA, INC.

    Inventor： Ingmar HARTL ,  Christian MOHR

    IPC: H01S3/11

    CPC classification number: H01S3/1106 ,  H01S3/06754 ,  H01S3/1121 ,  H01S3/1305 ,  H01S3/1306 ,  H01S3/1312 ,  H01S3/136 ,  H01S5/065 ,  H01S5/0657 ,  H01S5/06817 ,  H01S5/06835 ,  H01S5/0687 ,  H01S2301/02

    Abstract: The present invention features a laser based system configured with a noise detection unit. The system includes a mode-locked oscillator. A noise detection unit includes at least one optical detector that monitors optical pulses generated by the mode-locked oscillator and produces an electrical signal in response to the optical pulses. The noise detection unit includes a first filter to transmit signal power over a signal bandwidth which includes the mode-locked laser repetition frequency, frep. The noise detection unit may include one or more filters to transmit power over a noise bandwidth that substantially excludes repetition frequency, frep. Non-linear signal processing equipment is utilized to generate one or more signals representative of the power in the signal bandwidth relative to the power in the noise bandwidth. The system includes a controller operable to generate a signal for controlling the laser based system based on the relative power.

    Abstract translation: 本发明的特征在于具有噪声检测单元的基于激光的系统。 该系统包括锁模振荡器。 噪声检测单元包括至少一个光检测器，其监测由锁模振荡器产生的光脉冲，并响应于光脉冲产生电信号。 噪声检测单元包括用于在包括锁模激光重复频率frep的信号带宽上传输信号功率的第一滤波器。 噪声检测单元可以包括一个或多个滤波器，以在基本上排除重复频率frep的噪声带宽上传输功率。 利用非线性信号处理设备产生一个或多个表示信号带宽中相对于噪声带宽中功率的功率的信号。 该系统包括可操作以基于相对功率产生用于控制基于激光的系统的信号的控制器。

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