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公开(公告)号：US20170271838A9
公开(公告)日：2017-09-21
申请号：US13958703
申请日：2013-08-05
Applicant: IMRA AMERICA, INC.
Inventor： Martin E. FERMANN
IPC: H01S3/11
CPC classification number: H01S3/1115 , H01S3/0057 , H01S3/0675 , H01S3/06754 , H01S3/094019 , H01S3/094042 , H01S3/109 , H01S3/1112 , H01S3/1616 , H01S3/1618 , H01S3/302
Abstract: A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Peak power handling capability of fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive pulse stretching in the presence of self-phase modulation and gain results in the formation of high-power parabolic pulses. To ensure a wide tunability of the whole system, Raman-shifting of the compact sources of ultrashort pulses in conjunction with frequency-conversion in nonlinear optical crystals can be implemented, or an Anti-Stokes fiber in conjunction with fiber amplifiers and Raman-shifters are used. Positive dispersion optical amplifiers are used to improve transmission characteristics. An optical communication system utilizes a Raman amplifier fiber pumped by a train of Raman-shifted, wavelength-tunable pump pulses, to thereby amplify an optical signal which counterpropagates within the Raman amplifier fiber with respect to the pump pulses.
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公开(公告)号：US09751154B2
公开(公告)日：2017-09-05
申请号：US13975990
申请日：2013-08-26
Applicant: IMRA AMERICA, INC.
Inventor： James Bovatsek , Alan Y. Arai , Fumiyo Yoshino
IPC: B23K26/40 , B23K26/53 , B23K26/00 , B23K26/06 , B28D5/00 , B29C65/00 , C03B23/20 , C03B23/203 , B29C65/14 , B81B1/00 , B29C59/16 , C03B33/02 , B23K26/364 , B23K26/244 , B23K26/0622 , B29C65/16 , B29C65/38 , B29K33/00 , B29K69/00 , B23K103/00
CPC classification number: B23K26/0057 , B23K26/0617 , B23K26/0624 , B23K26/244 , B23K26/364 , B23K26/40 , B23K26/53 , B23K2103/50 , B28D5/0011 , B29C59/16 , B29C65/14 , B29C65/1616 , B29C65/1635 , B29C65/1638 , B29C65/1658 , B29C65/1664 , B29C65/1674 , B29C65/1696 , B29C65/38 , B29C66/1122 , B29C66/30223 , B29C66/322 , B29C66/3282 , B29C66/41 , B29C66/43 , B29C66/71 , B29C66/73366 , B29C66/7352 , B29C66/73921 , B29C66/836 , B29C66/91641 , B29C66/919 , B29C66/934 , B29C66/939 , B29C66/944 , B29C66/949 , B29K2033/12 , B29K2069/00 , B29K2995/0026 , B81B1/00 , B81C1/00119 , C03B23/20 , C03B23/203 , C03B33/0222 , C03C23/0025 , Y10T428/13 , Y10T428/15 , Y10T428/24479 , Y10T428/24802 , B29C65/00
Abstract: Methods for ultrashort pulse laser processing of optically transparent materials. A method for scribing transparent materials uses ultrashort laser pulses to create multiple scribe features with a single pass of the laser beam across the material, with at least one of the scribe features being formed below the surface of the material. This enables clean breaking of transparent materials at a higher speed than conventional techniques. Slightly modifying the ultrashort pulse laser processing conditions produces sub-surface marks. When properly arranged, these marks are clearly visible with side-illumination and not clearly visible without side-illumination. In addition, a method for welding transparent materials uses ultrashort laser pulses to create a bond through localized heating. The ultrashort pulse duration causes nonlinear absorption of the laser radiation, and the high repetition rate of the laser causes pulse-to-pulse accumulation of heat within the materials. The laser is focused near the interface of the materials, generating a high energy fluence at the region to be welded. This minimizes damage to the rest of the material and enables fine weld lines.
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公开(公告)号：US09711932B2
公开(公告)日：2017-07-18
申请号：US14847139
申请日：2015-09-08
Applicant: IMRA AMERICA, INC.
Inventor： Martin Fermann , Ingmar Hartl , Axel Ruehl
IPC: H01S3/11 , G01J3/45 , G01N21/31 , G01N21/3581 , G01N21/47 , G01N21/63 , G01N21/65 , H01S3/067 , G01J3/10 , G01N21/35 , H01S3/105 , H01S3/106 , H01S3/107
CPC classification number: H01S3/1106 , G01J3/10 , G01J3/45 , G01J2003/102 , G01N21/31 , G01N21/3581 , G01N21/4795 , G01N21/636 , G01N21/65 , G01N2021/3595 , H01S3/067 , H01S3/105 , H01S3/1068 , H01S3/107 , H01S3/1115
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. In at least one embodiment a coherent dual scanning laser system (CDSL) includes two passively modelocked fiber oscillators. In some embodiments an effective CDSL is constructed with only one laser. At least one embodiment includes a coherent scanning laser system (CSL) for generating pulse pairs with a time varying time delay. A CDSL, effective CDSL, or CSL may be arranged in an imaging system for one or more of optical imaging, microscopy, micro-spectroscopy and/or THz imaging.
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公开(公告)号：US09653868B2
公开(公告)日：2017-05-16
申请号：US15207959
申请日：2016-07-12
Applicant: IMRA America, Inc.
Inventor： Martin E. Fermann , Ingmar Hartl , Gennady Imeshev
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.
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公开(公告)号：US09636773B2
公开(公告)日：2017-05-02
申请号：US13766357
申请日：2013-02-13
Applicant: IMRA America, Inc.
Inventor： James Bovatsek , Alan Y. Arai , Fumiyo Yoshino
IPC: B23K26/364 , B23K26/53 , B23K26/00 , B23K26/06 , B28D5/00 , B29C65/00 , C03B23/20 , C03B23/203 , B29C65/14 , B81B1/00 , B29C59/16 , C03B33/02 , B23K26/244 , B23K26/0622 , B23K26/40 , B29C65/16 , B29C65/38 , B29K33/00 , B29K69/00 , B23K103/00
CPC classification number: B23K26/0057 , B23K26/0617 , B23K26/0624 , B23K26/244 , B23K26/364 , B23K26/40 , B23K26/53 , B23K2103/50 , B28D5/0011 , B29C59/16 , B29C65/14 , B29C65/1616 , B29C65/1635 , B29C65/1638 , B29C65/1658 , B29C65/1664 , B29C65/1674 , B29C65/1696 , B29C65/38 , B29C66/1122 , B29C66/30223 , B29C66/322 , B29C66/3282 , B29C66/41 , B29C66/43 , B29C66/71 , B29C66/73366 , B29C66/7352 , B29C66/73921 , B29C66/836 , B29C66/91641 , B29C66/919 , B29C66/934 , B29C66/939 , B29C66/944 , B29C66/949 , B29K2033/12 , B29K2069/00 , B29K2995/0026 , B81B1/00 , B81C1/00119 , C03B23/20 , C03B23/203 , C03B33/0222 , C03C23/0025 , Y10T428/13 , Y10T428/15 , Y10T428/24479 , Y10T428/24802 , B29C65/00
Abstract: A method for scribing transparent materials uses ultrashort laser pulses to create multiple scribe features with a single pass of the laser beam across the material, with at least one of the scribe features being formed below the surface of the material. This enables clean breaking of transparent materials at a higher speed than conventional techniques.
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Patent Agency Ranking
公开(公告)号：US20170085053A1
公开(公告)日：2017-03-23
申请号：US15364946
申请日：2016-11-30
Applicant: IMRA AMERICA, INC.
Inventor： Martin FERMANN
IPC: H01S3/11 , H01S3/0941 , H01S3/109 , H01S3/094 , H01S3/067
CPC classification number: H01S3/10046 , B23K26/0624 , H01J49/161 , H01S3/0057 , H01S3/06708 , H01S3/06725 , H01S3/06741 , H01S3/0675 , H01S3/06754 , H01S3/08013 , H01S3/094003 , H01S3/094026 , H01S3/094042 , H01S3/094061 , H01S3/0941 , H01S3/109 , H01S3/1106 , H01S3/1115
Abstract: The present invention relates to compact, low noise, ultra-short pulse sources based on fiber amplifiers, and various applications thereof. At least one implementation includes an optical amplification system having a fiber laser seed source producing seed pulses at a repetition rate corresponding to the fiber laser cavity round trip time. A nonlinear pulse transformer, comprising a fiber length greater than about 10 m, receives a seed pulse at its input and produces a spectrally broadened output pulse at its output, the output pulse having a spectral bandwidth which is more than 1.5 times a spectral bandwidth of a seed pulse. A fiber power amplifier receives and amplifies spectrally broadened output pulses. A pulse compressor is configured to temporally compress spectrally broadened pulses amplified by said power amplifier. Applications include micro-machining, ophthalmology, molecular desorption or ionization, mass-spectroscopy, and/or laser-based, biological tissue processing.
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127.发明申请公开(公告)号：US20170077669A1
公开(公告)日：2017-03-16
申请号：US15356845
申请日：2016-11-21
Applicant: IMRA AMERICA, INC.
Inventor： Donald J. HARTER
CPC classification number: H01S3/0057 , G02B6/2932 , G02B6/29374 , H01S3/067 , H01S3/06708 , H01S3/06716 , H01S3/06725 , H01S3/0675 , H01S3/06754 , H01S3/06758 , H01S3/08013 , H01S3/094003 , H01S3/094076 , H01S3/0941 , H01S3/10046 , H01S3/11 , H01S3/1106 , H01S3/1608 , H01S3/1618 , H01S3/2308 , H01S5/0057 , H04B10/508
Abstract: System for converting relatively long pulses from rep-rate variable ultrafast optical sources to shorter, high-energy pulses suitable for sources in high-energy ultrafast lasers. Fibers with positive group velocity dispersion (GVD) and self phase modulation are advantageously employed with the optical sources. These systems take advantage of the need for higher pulse energies at lower repetition rates so that such sources can be cost effective.
Abstract translation: 用于将相对长的脉冲从代表性可变超快光源转换为适用于高能超快激光源的较短，高能脉冲的系统。 具有正组速度色散（GVD）和自相位调制的光纤有利地与光源一起使用。 这些系统利用对较低重复频率的较高脉冲能量的需要，使得这些源可以具有成本效益。
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公开(公告)号：US20170063015A1
公开(公告)日：2017-03-02
申请号：US15207959
申请日：2016-07-12
Applicant: IMRA America, Inc.
Inventor： Martin E. Fermann , Ingmar Hartl , Gennady Imeshev
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。
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129.发明授权公开(公告)号：US09553417B2
公开(公告)日：2017-01-24
申请号：US14056052
申请日：2013-10-17
Applicant: IMRA AMERICA, INC.
Inventor： Donald J. Harter
CPC classification number: H01S3/0057 , G02B6/2932 , G02B6/29374 , H01S3/067 , H01S3/06708 , H01S3/06716 , H01S3/06725 , H01S3/0675 , H01S3/06754 , H01S3/06758 , H01S3/08013 , H01S3/094003 , H01S3/094076 , H01S3/0941 , H01S3/10046 , H01S3/11 , H01S3/1106 , H01S3/1608 , H01S3/1618 , H01S3/2308 , H01S5/0057 , H04B10/508
Abstract: System for converting relatively long pulses from rep-rate variable ultrafast optical sources to shorter, high-energy pulses suitable for sources in high-energy ultrafast lasers. Fibers with positive group velocity dispersion (GVD) and self phase modulation are advantageously employed with the optical sources. These systems take advantage of the need for higher pulse energies at lower repetition rates so that such sources can be cost effective.
Abstract translation: 用于将相对长的脉冲从代表性可变超快光源转换为适用于高能超快激光源的较短，高能脉冲的系统。 具有正组速度色散（GVD）和自相位调制的光纤有利地与光源一起使用。 这些系统利用对较低重复频率的较高脉冲能量的需要，使得这些源可以具有成本效益。
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公开(公告)号：US20160352063A1
公开(公告)日：2016-12-01
申请号：US15235239
申请日：2016-08-12
Applicant: IMRA AMERICA, INC.
Inventor： Martin E. Fermann
CPC classification number: H01S3/06708 , G02B6/26 , H01S3/0092 , H01S3/067 , H01S3/06704 , H01S3/06712 , H01S3/06716 , H01S3/06725 , H01S3/06729 , H01S3/06733 , H01S3/06737 , H01S3/06745 , H01S3/06783 , H01S3/08045 , H01S3/08054 , H01S3/094007 , H01S3/094019 , H01S3/094042 , H01S3/094069 , H01S3/1106 , H01S3/1109 , H01S3/1115 , H01S3/1118 , H01S3/1608 , H01S3/1618
Abstract: A laser utilizes a cavity design which allows the stable generation of high peak power pulses from mode-locked multi-mode fiber lasers, greatly extending the peak power limits of conventional mode-locked single-mode fiber lasers. Mode-locking may be induced by insertion of a saturable absorber into the cavity and by inserting one or more mode-filters to ensure the oscillation of the fundamental mode in the multi-mode fiber. The probability of damage of the absorber may be minimized by the insertion of an additional semiconductor optical power limiter into the cavity.
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