公开(公告)号：US20130259070A1

公开(公告)日：2013-10-03

申请号：US13907191

申请日：2013-05-31

Applicant: IMRA America, Inc.

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

IPC: H01S3/067

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。

公开(公告)号：US20130183837A1

公开(公告)日：2013-07-18

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

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.

公开(公告)号：US20040036957A1

公开(公告)日：2004-02-26

申请号：US10645662

申请日：2003-08-22

Applicant: IMRA AMERICA, INC.

Inventor： Almantas Galvanauskas ,  Donald J. Harter ,  Martin E. Fermann ,  Ferenc Raksi

IPC: H01S003/00

CPC classification number: G02F1/39 ,  B23K26/06 ,  B23K26/0624 ,  G02F2001/3548 ,  G02F2001/392 ,  H01S3/0057 ,  H01S3/0604 ,  H01S3/115

Abstract: The invention describes techniques for the control of the spatial as well as spectral beam quality of multi-mode fiber amplification of high peak power pulses as well as using such a configuration to replace the present diode-pumped, Neodynium based sources. Perfect spatial beam-quality can be ensured by exciting the fundamental mode in the multi-mode fibers with appropriate mode-matching optics and techniques. The loss of spatial beam-quality in the multi-mode fibers along the fiber length can be minimized by using multi-mode fibers with large cladding diameters. Near diffraction-limited coherent multi-mode amplifiers can be conveniently cladding pumped, allowing for the generation of high average power. Moreover, the polarization state in the multi-mode fiber amplifiers can be preserved by implementing multi-mode fibers with stress producing regions or elliptical fiber cores These lasers find application as a general replacement of Nd:based lasers, especially Nd:YAG lasers. Particularly utility is disclosed for applications in the marking, micro-machining and drilling areas.

Abstract translation: 本发明描述了用于控制高峰值功率脉冲的多模光纤放大的空间以及光束质量的技术，以及使用这种配置来替代当前二极管泵浦的基于钕的源。 通过适当的模式匹配光学和技术，可以通过激发多模光纤中的基模来确保完美的空间光束质量。 通过使用具有大包层直径的多模光纤，能够使沿着光纤长度的多模光纤中的空间光束质量损失最小化。 近衍射极限相干多模放大器可以方便地进行包层泵浦，从而产生高平均功率。 此外，通过实施具有应力产生区域或椭圆形光纤核心的多模光纤，可以保持多模光纤放大器中的偏振状态。这些激光器可用作Nd基激光器，尤其是Nd：YAG激光器的一般替代。 公开了用于标记，微加工和钻孔领域的应用。

公开(公告)号：WO2020076402A1

公开(公告)日：2020-04-16

申请号：PCT/US2019/044992

申请日：2019-08-02

Applicant: IMRA AMERICA, INC.

Inventor： KUSE, Naoya ,  FERMANN, Martin, E. ,  TETSUMOTO, Tomohiro ,  ROLLAND, Antoine, Jean, Gilbert

IPC: G02F1/35 ,  G02F1/365 ,  G02F1/39

Abstract: Systems and methods for precision control of microresonator (MR) based frequency combs may implement optimized MR actuators or MR modulators to control long-term locking of carrier envelope offset frequency, repetition rate, or resonance offset frequency of the MR. MR modulators can also be used for amplitude noise control. MR parameters can be locked to external reference frequencies such as a continuous wave laser or a microwave reference. MR parameters can be selected to reduce cross talk between the MR parameters, facilitating long-term locking. The MR can be locked to an external two wavelength delayed self-heterodyne interferometer for low noise microwave generation. An MR-based frequency comb can be tuned by a substantial fraction or more of the free spectral range (FSR) via a feedback control system. Scanning MR frequency combs may be applied to dead-zone free spectroscopy, multi-wavelength LIDAR, high precision optical clocks, or low phase noise microwave sources.

公开(公告)号：WO2018044500A1

公开(公告)日：2018-03-08

申请号：PCT/US2017/045450

申请日：2017-08-04

Applicant: IMRA AMERICA, INC.

Inventor： KUSE, Naoya ,  FERMANN, Martin, E.

IPC: G01R29/26 ,  G01R31/28

CPC classification number: G01R29/26 ,  G01R23/17 ,  G01R31/2824 ,  H04B10/63 ,  H04B2210/006

Abstract: Systems and methods for precision phase noise measurements of radio frequency (RF) oscillators are provided. An RF signal under test can be modulated on a continuous wave (cw) laser carrier frequency via generation of modulation side-bands using an appropriate modulator. A photonic delay line can be implemented as a self-heterodyne detection system for the phase noise, allowing for photonic down-conversion of the phase noise measurement to direct current (DC). The self-heterodyne detection system allows detection outside of any 1/f noise issues. Ultra-low phase noise detection for RF frequencies in a range from below 1 GHz to beyond 100 GHz is enabled with a low noise floor in the whole frequency range. Higher-order modulation sidebands can further reduce the noise floor of the system. Ultra-low noise RF (microwave) output can be generated. The RF signal under test can be generated by a dielectric resonance oscillator or opto-electronic oscillator.

Abstract translation: 提供了用于射频（RF）振荡器的精确相位噪声测量的系统和方法。 测试中的RF信号可以使用适当的调制器通过调制边带的产生在连续波（cw）激光载波频率上进行调制。 光子延迟线可以实现为相位噪声的自外差检测系统，允许将相位噪声测量光子下转换为直流电（DC）。 自我外差检测系统允许在任何1 / f噪声问题之外进行检测。 针对低于1 GHz至超过100 GHz范围内的射频频率的超低相位噪声检测可以在整个频率范围内实现低噪底。 高阶调制边带可以进一步降低系统的本底噪声。 可以产生超低噪声RF（微波）输出。 被测RF信号可以由介质谐振振荡器或光电振荡器产生。

公开(公告)号：WO2017209989A1

公开(公告)日：2017-12-07

申请号：PCT/US2017/033549

申请日：2017-05-19

Applicant: IMRA AMERICA, INC.

Inventor： LEE, Kevin, F. ,  FERMANN, Martin, E.

IPC: G02F1/01 ,  G02F1/35 ,  H01S3/067 ,  G02B26/00

Abstract: Systems and methods for stabilizing mid-infrared light generated by difference frequency mixing may include a mode locked Er fiber laser that generates pulses, which are split into a pump arm and a wavelength shifting, signal arm. Pump arm pulses are amplified in Er doped fiber. Shifting arm pulses are amplified in Er doped fiber and shifted to longer wavelengths in Raman- shifting fiber or highly nonlinear fiber, where they may be further amplified by Tm doped fiber, and then optionally further wavelength shifted. Pulses from the two arms can be combined in a nonlinear crystal such as orientation-patterned gallium phosphide, producing a mid-infrared difference frequency, as well as nonlinear combinations (e.g., sum frequency) having near infrared and visible wavelengths. Optical power stabilization can be achieved using two wavelength ranges with spectral filtering and multiple detectors acquiring information for feedback control. Controlled fiber bending can be used to stabilize optical power.

Abstract translation: 用于稳定由差频混频产生的中红外光的系统和方法可以包括产生脉冲的锁模Er光纤激光器，其被分成泵臂和波长偏移信号臂。 在铒掺杂光纤中放大泵臂脉冲。 移动臂脉冲在铒掺杂光纤中被放大，并且在拉曼位移光纤或高度非线性光纤中被移位到更长波长，其中它们可以被Tm掺杂光纤进一步放大，然后可选地进一步波长移位。 来自两个臂的脉冲可以组合成非线性晶体，例如定向图案化的磷化镓，产生中红外差频以及具有近红外和可见光波长的非线性组合（例如和频）。 光功率稳定可以使用两个波长范围与光谱过滤和多个检测器获取反馈控制信息来实现。 受控光纤弯曲可以用来稳定光功率。

公开(公告)号：WO2016164263A1

公开(公告)日：2016-10-13

申请号：PCT/US2016/025527

申请日：2016-04-01

Applicant: IMRA AMERICA, INC.

Inventor： FERMANN, Martin, E. ,  KUSE, Naoya

IPC: H03B17/00 ,  H01S3/00 ,  H01S3/067 ,  H01S3/107 ,  H01S3/11 ,  H01S3/13 ,  H01S3/136 ,  H01S3/23

CPC classification number: H01S3/1304 ,  H01S3/0014 ,  H01S3/0057 ,  H01S3/0078 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06712 ,  H01S3/06791 ,  H01S3/107 ,  H01S3/1118 ,  H01S3/1305 ,  H01S3/1306 ,  H01S3/1307 ,  H01S3/136 ,  H01S3/2391 ,  H03B17/00 ,  H03B2200/009 ,  H03D7/14 ,  H03F3/08 ,  H03L7/24

Abstract: Low phase noise radio frequency (RF) sources generated by voltage controlled oscillators (VCOs) are described. Optical modulators driven by a VCO may be used to generate optical side-bands to cw lasers. The spectral extent of said side-bands can be increased via frequency broadening in highly nonlinear waveguides. Free running mode locked low phase noise comb oscillators can be used as reference oscillators to generate beat signals between those side-bands and individual comb modes at distal spectral regions, thereby creating an error signal used to reduce the phase noise of VCOs and the generation of low phase noise RF signals. VCO phase noise may be reduced by using free-running modelocked comb lasers phase locked to external frequency references, by omitting a reference comb and using a nonlinear interferometer for generating an error signal, or by locking a slave comb to the modulation frequency of an intra-cavity modulator driven by the VCO.

Abstract translation: 描述了由压控振荡器（VCO）产生的低相位噪声射频（RF）源。 由VCO驱动的光调制器可用于产生cw激光器的光学边带。 可以通过高度非线性波导中的频率扩展来增加所述边带的频谱范围。 自由运行模式锁定低相位噪声梳状振荡器可用作参考振荡器，以在远端光谱区域之间的这些边带与各个梳状模式之间产生拍频信号，从而产生用于降低VCO相位噪声的误差信号， 低相位噪声RF信号。 可以通过使用锁相到外部频率参考的自由运行模式锁定梳状激光器，通过省略参考梳和使用非线性干涉仪来产生误差信号，或者通过将从属梳锁定到内部的调制频率来减小VCO相位噪声 由VCO驱动的腔调制器。

公开(公告)号：WO2014178935A1

公开(公告)日：2014-11-06

申请号：PCT/US2014/016348

申请日：2014-02-14

Applicant: IMRA AMERICA, INC.

Inventor： ICHIKAWA, Yuki ,  MARCINKEVICUS, Andrius

IPC: B01J13/00 ,  B82Y5/00 ,  G01N21/65

CPC classification number: G01N21/65 ,  B01J13/0043 ,  B82Y15/00 ,  B82Y40/00 ,  G01N21/658 ,  G01N2021/653

Abstract: Disclosed is a method for making a colloidal suspension of precious metal nanoparticles. The method comprises providing a target material comprising a precious metal in a liquid dispersion medium in an ablation container. The dispersion medium has an electrical conductivity within a predetermined conductivity range. Laser pulses are used to generate the nanoparticles from the target in the container. While generating the nanoparticles the electrical conductivity of the dispersion medium is monitored and maintained within the predetermined range and thereby the generated nanoparticles are produced within a predetermined size range. The generated nanoparticles are used to form a colloidal suspension.

Abstract translation: 公开了一种制备贵金属纳米颗粒的胶体悬浮液的方法。 该方法包括在消融容器中的液体分散介质中提供包含贵金属的靶材料。 分散介质具有预定电导率范围内的导电性。 激光脉冲用于从容器中的靶产生纳米颗粒。 在产生纳米颗粒的同时，监测分散介质的导电性并将其保持在预定范围内，从而在预定尺寸范围内产生生成的纳米颗粒。 生成的纳米粒子用于形成胶体悬浮液。

公开(公告)号：WO2014160844A3

公开(公告)日：2014-10-02

申请号：PCT/US2014/031985

申请日：2014-03-27

Applicant: IMRA AMERICA, INC.

Inventor： MURAKAMI, Makoto ,  LIU, Bing

IPC: C40B30/04 ,  G01R33/02 ,  B82Y5/00 ,  B82Y15/00 ,  B82Y25/00

Abstract: Disclosed is process for preparing magnetic nanoparticles (MNPs) that results in very sensitive MNPs that can be used in a variety of diagnostic and analytical methods. The MNPs exhibit superparamagnetism and find special use in giant magnetoresistance sensors (GMRS). The MNPs are created by a process that permits one to tune the size of nanoparticles to a range of from 10 to 20 nanometers with a very small particle size distribution of +/- 2 nanometers or less. The MNPs can be tagged with a variety of markers and thus find use in many analytical assays, cell sorting techniques, imaging methods, drug delivery methods and cancer treatments. The inventive MNPs can be detected in magnetic file strengths of 2000 Oe or less.

公开(公告)号：WO2014160844A2

公开(公告)日：2014-10-02

申请号：PCT/US2014031985

申请日：2014-03-27

Applicant: IMRA AMERICA INC

Inventor： MURAKAMI MAKOTO ,  LIU BING

IPC: A61K49/18

CPC classification number: A61K9/1617 ,  A61K49/1839 ,  B22F1/0014 ,  B22F1/0018 ,  B22F2304/054 ,  B82Y25/00 ,  C22C2202/02 ,  G01N33/58 ,  G01N2446/80 ,  G01R33/1269 ,  G01R33/1276 ,  Y10S977/773 ,  Y10S977/932

Abstract: Disclosed is process for preparing magnetic nanoparticles (MNPs) that results in very sensitive MNPs that can be used in a variety of diagnostic and analytical methods. The MNPs exhibit superparamagnetism and find special use in giant magnetoresistance sensors (GMRS). The MNPs are created by a process that permits one to tune the size of nanoparticles to a range of from 10 to 20 nanometers with a very small particle size distribution of +/- 2 nanometers or less. The MNPs can be tagged with a variety of markers and thus find use in many analytical assays, cell sorting techniques, imaging methods, drug delivery methods and cancer treatments. The inventive MNPs can be detected in magnetic file strengths of 2000 Oe or less.

Abstract translation: 公开了制备磁性纳米颗粒（MNPs）的方法，其导致非常敏感的MNP，其可用于各种诊断和分析方法。 MNPs表现出超顺磁性，并在巨磁电阻传感​​器（GMRS）中发现特殊用途。 通过允许将纳米颗粒的尺寸调整到10至20纳米范围的方法来产生MNP，其具有+/- 2纳米或更小的非常小的粒度分布。 MNP可以用多种标记进行标记，因此可用于许多分析测定，细胞分选技术，成像方法，药物递送方法和癌症治疗。 可以在2000Oe以下的磁文件强度中检测本发明的MNP。