公开(公告)号：US10256597B2

公开(公告)日：2019-04-09

申请号：US15439062

申请日：2017-02-22

Applicant: IMRA AMERICA, INC.

Inventor： Donald J. Harter ,  Gyu C. Cho ,  Zhenlin Liu ,  Martin E. Fermann ,  Xinhua Gu ,  Salvatore F. Nati ,  Lawrence Shah ,  Ingmar Hartl ,  Mark Bendett

IPC: H01S3/11 ,  H01S3/00 ,  H01S3/067 ,  H01S3/108 ,  H01S3/109 ,  H01S3/16 ,  H01S3/23 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/13

Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.

公开(公告)号：US10014653B2

公开(公告)日：2018-07-03

申请号：US14883018

申请日：2015-10-14

Applicant: IMRA AMERICA, INC.

Inventor： Ingmar Hartl ,  Martin Fermann

IPC: G02B6/00 ,  H01S3/11 ,  G02F1/365 ,  H01S3/067 ,  H01S3/10 ,  G02F1/355 ,  G02F1/35

CPC classification number: H01S3/1112 ,  G02F1/3558 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2203/56 ,  H01S3/067 ,  H01S3/06716 ,  H01S3/10007 ,  H01S2301/02

Abstract: Frequency standards based on mode-locked fiber lasers, fiber amplifiers and fiber-based ultra-broad bandwidth light sources, and applications of the same.

公开(公告)号：US20170343731A1

公开(公告)日：2017-11-30

申请号：US15485025

申请日：2017-04-11

Applicant: IMRA America, Inc.

Inventor： Liang Dong ,  Donald J. Harter ,  William Wong

IPC: G02B6/032 ,  G02B6/024 ,  G02B6/32 ,  G02B6/14 ,  H01S3/067 ,  G02B6/02

CPC classification number: G02B6/032 ,  G02B6/02009 ,  G02B6/02047 ,  G02B6/02328 ,  G02B6/02338 ,  G02B6/02342 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/024 ,  G02B6/14 ,  G02B6/32 ,  H01S3/06716 ,  H01S3/06729 ,  H01S3/06733 ,  H01S3/06741 ,  H01S3/06754

Abstract: Holey fibers provide optical propagation. In various embodiments, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers.

公开(公告)号：US20170343730A1

公开(公告)日：2017-11-30

申请号：US15593638

申请日：2017-05-12

Applicant: IMRA America, Inc.

Inventor： Liang Dong ,  William Wong ,  Martin E. Fermann

IPC: G02B6/02 ,  G02B6/00 ,  H01S3/23 ,  H01S3/094 ,  H01S3/067 ,  H01S3/02 ,  H01S3/00 ,  G02F1/01 ,  G02B6/32 ,  G02B6/26 ,  G02B6/24 ,  G02B6/036 ,  G02B6/024 ,  H01S3/30 ,  H01S3/16

CPC classification number: G02B6/02357 ,  G02B6/00 ,  G02B6/02 ,  G02B6/02009 ,  G02B6/02033 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/02371 ,  G02B6/024 ,  G02B6/036 ,  G02B6/03633 ,  G02B6/03694 ,  G02B6/24 ,  G02B6/26 ,  G02B6/262 ,  G02B6/32 ,  G02F1/0134 ,  H01S3/0057 ,  H01S3/02 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/1618 ,  H01S3/2308 ,  H01S3/302 ,  H01S2302/00

Abstract: Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprise cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

公开(公告)号：US09759983B2

公开(公告)日：2017-09-12

申请号：US14967709

申请日：2015-12-14

Applicant: IMRA AMERICA, INC.

Inventor： Martin Fermann ,  Ingmar Hartl

IPC: G02F1/00 ,  G02F1/365 ,  H01S3/11 ,  G01J3/10 ,  H01S3/067 ,  H01S3/00 ,  H01S3/08 ,  H01S3/10 ,  H01S3/105 ,  H01S3/16 ,  G02F1/35

CPC classification number: G02F1/365 ,  G01J3/10 ,  G02F2001/3528 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/0675 ,  H01S3/08054 ,  H01S3/0809 ,  H01S3/10046 ,  H01S3/105 ,  H01S3/1106 ,  H01S3/1112 ,  H01S3/1115 ,  H01S3/1118 ,  H01S3/1618

Abstract: A frequency comb laser providing large comb spacing is disclosed. At least one embodiment includes a mode locked waveguide laser system. The mode locked waveguide laser includes a laser cavity having a waveguide, and a dispersion control unit (DCU) in the cavity. The DCU imparts an angular dispersion, group-velocity dispersion (GVD) and a spatial chirp to a beam propagating in the cavity. The DCU is capable of producing net GVD in a range from a positive value to a negative value. In some embodiments a tunable fiber frequency comb system configured as an optical frequency synthesizer is provided. In at least one embodiment a low phase noise micro-wave source may be implemented with a fiber comb laser having a comb spacing greater than about 1 GHz. The laser system is suitable for mass-producible fiber comb sources with large comb spacing and low noise. Applications include high-resolution spectroscopy.

公开(公告)号：US09680280B2

公开(公告)日：2017-06-13

申请号：US13967465

申请日：2013-08-15

Applicant: IMRA AMERICA, INC.

Inventor： Salvatore F. Nati ,  Otho E. Ulrich, Jr. ,  Gyu C. Cho ,  Wayne A. Gillis ,  Donald J. Harter ,  Mark Bendett ,  Ingmar Hartl

IPC: H01S3/00 ,  H01S3/067 ,  H01S3/0941 ,  H01S3/11 ,  H01S3/10 ,  H01S3/105 ,  H01S3/13 ,  H01S3/131 ,  H01S3/139

CPC classification number: H01S3/06779 ,  H01S3/06758 ,  H01S3/0941 ,  H01S3/10015 ,  H01S3/1003 ,  H01S3/10038 ,  H01S3/10046 ,  H01S3/105 ,  H01S3/1112 ,  H01S3/1305 ,  H01S3/1312 ,  H01S3/1394

Abstract: An electronic circuit for controlling a laser system consisting of a pulse source and high power fiber amplifier is disclosed. The circuit is used to control the gain of the high power fiber amplifier system so that the amplified output pulses have predetermined pulse energy as the pulse width and repetition rate of the oscillator are varied. This includes keeping the pulse energy constant when the pulse train is turned on. The circuitry is also used to control the temperature of the high power fiber amplifier pump diode such that the wavelength of the pump diode is held at the optimum absorption wavelength of the fiber amplifier as the diode current is varied. The circuitry also provides a means of protecting the high power fiber amplifier from damage due to a loss of signal from the pulse source or from a pulse-source signal of insufficient injection energy.

公开(公告)号：US09664849B2

公开(公告)日：2017-05-30

申请号：US15042833

申请日：2016-02-12

Applicant: IMRA America, Inc.

Inventor： Liang Dong ,  William Wong ,  Martin E. Fermann

IPC: G02B6/44 ,  G02B6/02 ,  G02B6/00 ,  G02B6/036 ,  G02B6/24 ,  G02B6/26 ,  G02B6/32 ,  H01S3/00 ,  H01S3/067 ,  H01S3/23 ,  H01S3/02 ,  H01S3/30 ,  G02B6/024 ,  G02F1/01 ,  H01S3/094 ,  H01S3/16

CPC classification number: G02B6/02357 ,  G02B6/00 ,  G02B6/02 ,  G02B6/02009 ,  G02B6/02033 ,  G02B6/02361 ,  G02B6/02366 ,  G02B6/02371 ,  G02B6/024 ,  G02B6/036 ,  G02B6/03633 ,  G02B6/03694 ,  G02B6/24 ,  G02B6/26 ,  G02B6/262 ,  G02B6/32 ,  G02F1/0134 ,  H01S3/0057 ,  H01S3/02 ,  H01S3/06708 ,  H01S3/06729 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/1618 ,  H01S3/2308 ,  H01S3/302 ,  H01S2302/00

Abstract: Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprise cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining.

公开(公告)号：US09590386B2

公开(公告)日：2017-03-07

申请号：US14482093

申请日：2014-09-10

Applicant: IMRA AMERICA, INC.

Inventor： Donald J. Harter ,  Gyu C. Cho ,  Zhenlin Liu ,  Martin E. Fermann ,  Xinhua Gu ,  Salvatore F. Nati ,  Lawrence Shah ,  Ingmar Hartl ,  Mark Bendett

IPC: H01S3/11 ,  H01S3/23 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/108 ,  H01S3/109 ,  H01S3/16

CPC classification number: H01S3/1106 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/0064 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094019 ,  H01S3/094042 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/1086 ,  H01S3/109 ,  H01S3/11 ,  H01S3/1118 ,  H01S3/1305 ,  H01S3/1611 ,  H01S3/1618 ,  H01S3/1643 ,  H01S3/235

Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.

Abstract translation: 本发明描述了可用作用于工业设置的用于基于Nd：或Yb：的再生放大器的脉冲源的鲁棒光纤激光器系统。 本发明修改了适应性，并结合了FCPA系统中的几个最新进展，用作这种新型再生放大器的输入源。

公开(公告)号：US09559483B2

公开(公告)日：2017-01-31

申请号：US15041066

申请日：2016-02-11

Applicant: IMRA AMERICA, INC.

Inventor： Martin Fermann ,  Ingmar Hartl ,  Andrius Marcinkevicius ,  Liang Dong

IPC: H01S3/067 ,  G02B6/02 ,  H01S3/13 ,  H01S3/094 ,  H01S3/00 ,  H01S3/08 ,  H01S3/10 ,  H01S3/23

CPC classification number: H01S3/06737 ,  G02B6/02042 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/06704 ,  H01S3/06712 ,  H01S3/06729 ,  H01S3/06741 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/08059 ,  H01S3/094007 ,  H01S3/094019 ,  H01S3/094053 ,  H01S3/094076 ,  H01S3/10084 ,  H01S3/1305 ,  H01S3/1307 ,  H01S3/2333 ,  H01S3/2383

Abstract: High power parallel fiber arrays for the amplification of high peak power pulses are described. Fiber arrays based on individual fiber amplifiers as well as fiber arrays based on multi-core fibers can be implemented. The optical phase between the individual fiber amplifier elements of the fiber array is measured and controlled using a variety of phase detection and compensation techniques. High power fiber array amplifiers can be used for EUV and X-ray generation as well as pumping of parametric amplifiers.

Abstract translation: 描述了用于放大高峰值功率脉冲的大功率并行光纤阵列。 可以实现基于单个光纤放大器的光纤阵列以及基于多芯光纤的光纤阵列。 使用各种相位检测和补偿技术来测量和控制光纤阵列的各个光纤放大器元件之间的光学相位。 大功率光纤阵列放大器可用于EUV和X射线产生以及泵浦参数放大器。

公开(公告)号：US09553421B2

公开(公告)日：2017-01-24

申请号：US14571367

申请日：2013-10-16

Applicant: IMRA AMERICA, INC.

Inventor： Martin E. Fermann

IPC: H01S3/067 ,  H01S3/00 ,  B23K26/062 ,  H01S3/11 ,  H01S3/094 ,  H01J49/16

CPC classification number: H01S3/1106 ,  B23K26/0624 ,  H01J49/161 ,  H01S3/0057 ,  H01S3/06708 ,  H01S3/06741 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094026 ,  H01S3/094042 ,  H01S3/094061 ,  H01S3/0941 ,  H01S3/109 ,  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.

Abstract translation: 本发明涉及基于光纤放大器的紧凑，低噪声，超短脉冲源及其各种应用。 至少一个实施方案包括具有光纤激光种子源的光放大系统，其以对应于光纤激光腔往返时间的重复频率产生种子脉冲。 包括光纤长度大于约10微米的非线性脉冲变压器在其输入处接收种子脉冲，并在其输出端产生光谱扩展的输出脉冲，其输出脉冲的光谱带宽大于光谱带宽的1.5倍 种子脉冲。 光纤功率放大器接收并放大光谱扩展的输出脉冲。 脉冲压缩器被配置为在时间上压缩由所述功率放大器放大的频谱变宽的脉冲。 应用包括微加工，眼科学，分子解吸或离子化，质谱法和/或基于激光的生物组织处理。