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    Noise detection, diagnostics, and control of modelocked lasers
    93.
    发明授权
    Noise detection, diagnostics, and control of modelocked lasers 有权
    锁模激光器的噪声检测，诊断和控制

    公开(公告)号：US09048626B2

    公开(公告)日：2015-06-02

    申请号：US14484699

    申请日：2014-09-12

    Applicant: IMRA AMERICA, INC.

    Inventor： Ingmar Hartl ,  Christian Mohr

    IPC: H01S3/00 ,  H01S3/11 ,  H01S5/0687 ,  H01S5/0683 ,  H01S5/068 ,  H01S5/065

    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功率相对于噪声带宽中功率的信号。 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。

    HIGH POWER SHORT PULSE FIBER LASER
    95.
    发明申请
    HIGH POWER SHORT PULSE FIBER LASER 有权

    公开(公告)号：US20150085885A1

    公开(公告)日：2015-03-26

    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: H01S3/11 ,  H01S3/067

    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.

    Methods and systems for laser processing of coated substrates
    96.
    发明授权
    Methods and systems for laser processing of coated substrates 有权
    涂层基材的激光加工方法和系统

    公开(公告)号：US08969220B2

    公开(公告)日：2015-03-03

    申请号：US13714896

    申请日：2012-12-14

    Applicant: IMRA America, Inc.

    Inventor： Alan Y. Arai ,  Gyu Cheon Cho ,  Jingzhou Xu

    IPC: H01L21/268 ,  B23K26/00 ,  H01L21/78 ,  H01L33/00

    CPC classification number: H01L21/67092 ,  B23K26/0006 ,  B23K26/40 ,  B23K26/53 ,  B23K2103/16 ,  B23K2103/172 ,  H01L21/2686 ,  H01L21/78 ,  H01L33/0095 ,  Y10S438/94

    Abstract: Examples of methods and systems for laser processing of materials are disclosed. Methods and systems for singulation of a wafer comprising a coated substrate can utilize a laser outputting light that has a wavelength that is transparent to the wafer substrate but which may not be transparent to the coating layer(s). Using techniques for managing fluence and focal condition of the laser beam, the coating layer(s) and the substrate material can be processed through ablation and internal modification, respectively. The internal modification can result in die separation.

    Abstract translation: 公开了激光加工材料的方法和系统的实例。 用于单片化包括涂覆的基底的晶片的方法和系统可以利用激光输出具有对于晶片衬底是透明的但对涂层不透明的波长的光。 使用技术来管理激光束的注量和聚焦条件，涂层和基底材料可以分别通过消融和内部修饰进行处理。 内部修改可导致管芯分离。

    COMPACT COHERENT HIGH BRIGHTNESS LIGHT SOURCE FOR THE MID-IR AND FAR IR
    97.
    发明申请
    COMPACT COHERENT HIGH BRIGHTNESS LIGHT SOURCE FOR THE MID-IR AND FAR IR 审中-公开
    紧凑的高亮度光源，用于中红外和红外线

    公开(公告)号：US20150023628A1

    公开(公告)日：2015-01-22

    申请号：US14508056

    申请日：2014-10-07

    Applicant: IMRA AMERICA, INC.

    Inventor： Martin E. FERMANN ,  Ingmar HARTL

    IPC: H01S3/00

    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。

    COMPACT OPTICAL FREQUENCY COMB SYSTEMS
    98.
    发明申请
    COMPACT OPTICAL FREQUENCY COMB SYSTEMS 审中-公开
    紧凑的光学频率系统

    公开(公告)号：US20140321483A1

    公开(公告)日：2014-10-30

    申请号：US14325721

    申请日：2014-07-08

    Applicant: IMRA AMERICA, INC.

    Inventor： Martin E. FERMANN ,  Thomas R. SCHIBLI ,  Ingmar HARTL

    IPC: H01S3/11

    CPC classification number: H01S3/1115 ,  H01S3/0092 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/08059 ,  H01S3/10046 ,  H01S3/105 ,  H01S3/1053 ,  H01S3/1118 ,  H01S3/1616 ,  H01S3/176

    Abstract: Compact optical frequency sources are described. The comb source may include an intra-cavity optical element having a multi-material integrated structure with an electrically controllable active region. The active region may comprise a thin film. By way of example, the thin film and an insulating dielectric material disposed between two electrodes can provide for rapid loss modulation. In some embodiments the thin film may comprise graphene. In various embodiments of a frequency comb laser, rapid modulation of the CEO frequency can be implemented via electric modulation of the transmission or reflection loss of an additional optical element, which can be the saturable absorber itself. In another embodiment, the thin film can also be used as a saturable absorber in order to facilitate passive modelocking. In some implementations the optical element may be formed on a cleaved or polished end of an optical fiber.

    Abstract translation: 描述了紧凑的光频源。 梳状光源可以包括具有电子可控有源区域的多材料集成结构的腔内光学元件。 有源区可以包括薄膜。 作为示例，设置在两个电极之间的薄膜和绝缘介电材料可以提供快速损耗调制。 在一些实施例中，薄膜可以包括石墨烯。 在频率梳状激光器的各种实施例中，CEO频率的快速调制可以通过附加光学元件的传输或反射损耗的电调制来实现，其可以是可饱和吸收体本身。 在另一个实施例中，薄膜也可以用作饱和吸收体，以便于被动锁模。 在一些实施方式中，光学元件可以形成在光纤的切割或抛光端上。

    Compact coherent high brightness light source for the mid-IR and far IR
    99.
    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：US08861555B2

    公开(公告)日：2014-10-14

    申请号：US13682309

    申请日：2012-11-20

    Applicant: IMRA America, Inc.

    Inventor： Martin E. Fermann ,  Jens Bethge ,  Ingmar Hartl

    IPC: H01S3/30 ,  H01S3/00 ,  G02B6/02

    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。

    Ultra small core fiber with dispersion tailoring
    100.
    发明授权
    Ultra small core fiber with dispersion tailoring 有权
    超小芯纤维与分散裁剪

    公开(公告)号：US08824847B2

    公开(公告)日：2014-09-02

    申请号：US13915444

    申请日：2013-06-11

    Applicant: IMRA America, Inc.

    Inventor： Liang Dong ,  Brian Thomas ,  Libin Fu

    IPC: G02B6/02 ,  G02B6/036 ,  G02F1/365 ,  C03B37/012 ,  G02F1/39 ,  H01S3/00 ,  H01S3/067

    CPC classification number: G02F1/365 ,  C03B37/0122 ,  C03B2201/82 ,  C03B2201/86 ,  C03B2203/10 ,  C03B2203/14 ,  C03B2203/42 ,  C03B2205/08 ,  C03B2205/10 ,  G02B6/02214 ,  G02B6/02333 ,  G02B6/02357 ,  G02F1/395 ,  H01S3/0057 ,  H01S3/06729 ,  H01S3/06754

    Abstract: Various embodiments of optical fiber designs and fabrication processes for ultra small core fibers (USCF) are disclosed. In some embodiments, the USCF includes a core that is at least partially surrounded by a region comprising first features. The USCF further includes a second region at least partially surrounding the first region. The second region includes second features. In an embodiment, the first features are smaller than the second features, and the second features have a filling fraction greater than about 90 percent. The first features and/or the second features may include air holes. Embodiments of the USCF may provide dispersion tailoring. Embodiments of the USCF may be used with nonlinear optical devices configured to provide, for example, a frequency comb or a supercontinuum.

    Abstract translation: 公开了用于超小芯纤维（USCF）的光纤设计和制造工艺的各种实施例。 在一些实施例中，USCF包括至少部分地被包括第一特征的区域包围的芯。 USCF还包括至少部分围绕第一区域的第二区域。 第二个区域包括第二个特征。 在一个实施例中，第一特征小于第二特征，并且第二特征具有大于约90％的填充分数。 第一特征和/或第二特征可以包括气孔。 USCF的实施例可以提供色散调整。 USCF的实施例可以与被配置为提供例如频率梳或超连续谱的非线性光学装置一起使用。

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