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    Noise detection, diagnostics, and control of modelocked lasers
    112.
    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
    114.
    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
    115.
    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
    116.
    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
    117.
    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
    119.
    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。

    Quasi-phase-matched parametric chirped pulse amplification systems
    120.
    再颁专利
    Quasi-phase-matched parametric chirped pulse amplification systems 有权
    准相位匹配参数啁啾脉冲放大系统

    公开(公告)号：USRE45177E1

    公开(公告)日：2014-10-07

    申请号：US10396815

    申请日：2003-03-26

    Applicant: Almantas Galvanauskas ,  Donald Harter ,  Gregg Sucha

    Inventor： Almantas Galvanauskas ,  Donald Harter ,  Gregg Sucha

    IPC: H01S3/10 ,  H01S3/091

    CPC classification number: G02F1/39 ,  A61B18/22 ,  A61C1/0046 ,  B23K26/0624 ,  G02F2001/3548 ,  G02F2001/392 ,  H01S3/0057 ,  H01S3/0604 ,  H01S3/115

    Abstract: Use of quasi-phase-matched (QPM) materials for parametric chirped pulse amplification (PCPA) substantially reduces the required pump peak power and pump brightness, allowing exploitation of spatially-multimode and long duration pump pulses. It also removes restrictions on pump wavelength and amplification bandwidth. This allows substantial simplification in pump laser design for a high-energy PCPA system and, consequently, the construction of compact diode-pumped sources of high-energy ultrashort optical pulses. Also, this allows elimination of gain-narrowing and phase-distortion limitations on minimum pulse duration, which typically arise in a chirped pulse amplification system. One example of a compact source of high-energy ultrashort pulses is a multimode-core fiber based PCPA system. Limitations on pulse energy due to the limited core size for single-mode fibers are circumvented by using large multimode core. Limitations on pulse duration and beam quality due to multimode core are circumvented by using a PCPA scheme. Additionally, the large core of the multimode fiber facilitates cladding-pumping by inexpensive and high-power multiple-mode laser diodes.

    Abstract translation: 使用准相位匹配（QPM）材料进行参数啁啾脉冲放大（PCPA），大大降低了所需的泵浦峰值功率和泵浦亮度，从而允许利用空间多模和长时间泵浦脉冲。 它还消除了对泵浦波长和放大带宽的限制。 这大大简化了用于高能量PCPA系统的泵浦激光器设计，并因此实现了高能量超短脉冲光源的紧凑型二极管泵浦源的构建。 此外，这允许消除通常在啁啾脉冲放大系统中出现的最小脉冲持续时间上的增益变窄和相位失真的限制。 紧凑型高能超短脉冲源的一个例子是基于多模核心光纤的PCPA系统。 通过使用大型多模核，可以避免由于单模光纤尺寸有限引起的脉冲能量限制。 通过使用PCPA方案可以避免由多模核引起的脉冲持续时间和光束质量的限制。 此外，多模光纤的大芯片有助于通过廉价和大功率多模激光二极管进行包层泵浦。

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