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    Modular, high energy, widely-tunable ultrafast fiber source
    21.
    发明授权
    Modular, high energy, widely-tunable ultrafast fiber source 有权

    公开(公告)号：US09819142B2

    公开(公告)日：2017-11-14

    申请号：US13958703

    申请日：2013-08-05

    Applicant: IMRA AMERICA, INC.

    Inventor： Martin E. Fermann

    IPC: H01S3/00 ,  H01S3/11 ,  H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H01S3/109 ,  H01S3/16

    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.

    COMB RESOLVED FOURIER TRANSFORM SPECTROSCOPY
    25.
    发明申请
    COMB RESOLVED FOURIER TRANSFORM SPECTROSCOPY 审中-公开
    COMB决议FOURIER变换光谱

    公开(公告)号：US20160153835A1

    公开(公告)日：2016-06-02

    申请号：US14933334

    申请日：2015-11-05

    Applicant: IMRA America, Inc.

    Inventor： Kevin F. Lee ,  Martin E. Fermann

    IPC: G01J3/453 ,  G01J3/10

    CPC classification number: G01J3/453 ,  G01J3/108 ,  G01N21/031 ,  G01N21/1702 ,  G01N21/3504 ,  G01N21/39 ,  G01N29/2425 ,  G01N29/46 ,  G01N2021/1704 ,  G01N2021/3595 ,  G01N2021/391

    Abstract: Systems and methods for high resolution and high sensitivity spectroscopy are disclosed. High resolution can be obtained in conjunction with comb sources via comb resolved spectroscopy. For example, Fourier transform spectroscopy with a scan range larger than a cavity round trip time of the comb sources can be used to obtain comb resolution, where it may be useful to match the comb lines of the source with the sampling points of the Fourier transform spectrometer. High sensitivity can be obtained using multiple passes through a gas cell, cavity enhanced spectroscopy, cavity ring-down spectroscopy, or photo-acoustic spectroscopy. Fiber or solid-state lasers as well as semiconductor or quantum cascade based lasers can be used as comb injection sources. These sources can also be combined with nonlinear frequency broadening techniques via supercontinuum generation, DFG, OPOs or OPAs.

    Abstract translation: 公开了用于高分辨率和高灵敏度光谱的系统和方法。 通过梳状分辨光谱可以与梳状光源一起获得高分辨率。 例如，可以使用具有大于梳状源的腔体往返时间的扫描范围的傅立叶变换光谱来获得梳状分辨率，其中将源的梳状线与傅里叶变换的采样点相匹配可能是有用的 光谱仪 可以使用多次通过气室，腔增强光谱，空腔衰减光谱或光声谱来获得高灵敏度。 可以使用光纤或固态激光器以及基于半导体或量子级联的激光器作为梳状注入源。 这些源还可以通过超连续谱生成，DFG，OPO或OPA与非线性频率展宽技术相结合。

    Optical frequency ruler
    26.
    发明授权
    Optical frequency ruler 有权
    光频尺

    公开(公告)号：US09354485B2

    公开(公告)日：2016-05-31

    申请号：US13873869

    申请日：2013-04-30

    Applicant: IMRA AMERICA, Inc.

    Inventor： Martin E. Fermann ,  Ingmar Hartl

    IPC: G02F1/39 ,  H01S3/00 ,  H01S3/23

    CPC classification number: G02F1/39 ,  H01S3/0092 ,  H01S3/2308 ,  H01S3/2383

    Abstract: The present invention relates to frequency rulers. At least one embodiment includes a mode locked pump source operated at pulse repetition rate, and a pump output having a pump carrier envelope offset frequency. A nonlinear optical system outputs a frequency ruler spectrum comprising individual frequency modes. The frequency modes may be characterized by a frequency spacing which is an integer multiple of the repetition rate and by distinct ruler carrier envelope offset frequencies which exhibit at least one discontinuity across the frequency output. The ruler carrier envelope offset frequencies are substantially locked to the carrier envelope offset frequency of the pump laser. One preferred embodiment includes a frequency doubled, doubly resonant, non-degenerate OPO (DNOPO), a supercontinuum generation (SC) stage and at least one reference laser arranged downstream from a Tm fiber-based pump source. A plurality of beat signals generated therefrom provide for stabilization of the system.

    Abstract translation: 本发明涉及频率标尺。 至少一个实施例包括以脉冲重复率操作的模式锁定泵浦源，以及具有泵载波包络偏移频率的泵输出。 非线性光学系统输出包括各种频率模式​​的频率标尺。 频率模式的特征在于频率间隔是重复率的整数倍，并且通过不同的标尺载波包络偏移频率来表征，该频率间隔在频率输出端表现出至少一个不连续性。 标尺载波包络偏移频率基本上锁定在泵浦激光器的载波包络偏移频率上。 一个优选实施例包括频率倍增，双谐振，非简并OPO（DNOPO），超连续谱产生（SC）级和布置在Tm纤维基泵浦下游的至少一个参考激光器。 由此产生的多个拍子信号提供了系统的稳定性。

    OPTICAL PARAMETRIC AMPLIFICATION, OPTICAL PARAMETRIC GENERATION, AND OPTICAL PUMPING IN OPTICAL FIBERS SYSTEMS
    30.
    发明申请
    OPTICAL PARAMETRIC AMPLIFICATION, OPTICAL PARAMETRIC GENERATION, AND OPTICAL PUMPING IN OPTICAL FIBERS SYSTEMS 有权
    光学参数放大，光学参数生成和光纤泵浦系统中的光学泵浦

    公开(公告)号：US20130182724A1

    公开(公告)日：2013-07-18

    申请号：US13714840

    申请日：2012-12-14

    Applicant: IMRA AMERICA, INC.

    Inventor： Gennady Imeshev ,  Martin E. Fermann

    IPC: H01S3/10 ,  H01S3/08

    CPC classification number: H01S3/10015 ,  G02F1/3558 ,  G02F1/39 ,  G02F2001/392 ,  G02F2203/26 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/06708 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/08013 ,  H01S3/0941 ,  H01S3/10092 ,  H01S3/109 ,  H01S3/1608 ,  H01S3/1616 ,  H01S3/302

    Abstract: Embodiments described herein include a system for producing ultrashort tunable pulses based on ultra broadband OPA or OPG in nonlinear materials. The system parameters such as the nonlinear material, pump wavelengths, quasi-phase matching periods, and temperatures can be selected to utilize the intrinsic dispersion relations for such material to produce bandwidth limited or nearly bandwidth limited pulse compression. Compact high average power sources of short optical pulses tunable in the wavelength range of 1800 to 2100 nm and after frequency doubling in the wavelength range of 900 to 1050 nm can be used as a pump for the ultra broadband OPA or OPG. In certain embodiments, these short pump pulses are obtained from an Er fiber oscillator at about 1550 nm, amplified in Er fiber, Raman-shifted to 1800 to 2100 nm, stretched in a fiber stretcher, and amplified in Tm-doped fiber.

    Abstract translation: 本文描述的实施例包括用于在非线性材料中基于超宽带OPA或OPG产生超短可调脉冲的系统。 可以选择诸如非线性材料，泵浦波长，准相位匹配周期和温度之类的系统参数以利用这种材料的固有色散关系来产生带宽限制或几乎带宽限制的脉冲压缩。 可在1800至2100 nm的波长范围内调谐的短光脉冲的紧凑型高平均电源，在900至1050 nm的波长范围内倍频后可用作超宽带OPA或OPG的泵。 在某些实施例中，这些短泵浦脉冲从大约1550nm的Er光纤振荡器获得，在Er光纤中被放大，拉曼偏移到1800-2100nm，在纤维拉伸器中拉伸，并且在掺杂Tm的光纤中进行放大。

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