公开(公告)号：EP2374034A1

公开(公告)日：2011-10-12

申请号：EP09831150.9

申请日：2009-12-03

Applicant: Imra America, Inc.

Inventor： DONG, Liang ,  FERMANN, Martin, E. ,  MCKAY, Hugh ,  FU, Libin ,  SUZUKI, Shigeru

IPC: G02B6/00

CPC classification number: H01S3/175 ,  C03C13/046 ,  G02B6/02347 ,  G02B6/02366 ,  G02B6/02371 ,  G02B6/036 ,  G02B2006/12038 ,  G02B2006/1209 ,  H01S3/06716 ,  H01S3/1603 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/163 ,  H01S3/1691 ,  H01S3/1693 ,  H01S3/176 ,  H01S2301/03 ,  H04B10/2507

Abstract: Various embodiments described herein comprise a laser and/or an amplifier system including a doped gain fiber (1404) having ytterbium ions in a phosphosilicate glass. Various embodiments described herein increase pump absorption to at least about 1000 dB/m - 9000 dB/m. The use of these gain fibers provide for increased peak -powers and/or pulse energies. The various embodiments of the doped gain fiber (1404) having ytterbium ions in a phosphosilicate glass exhibit reduced photo-darkening levels compared to photo-darkening levels obtainable with equivalent doping levels of an ytterbium doped silica fiber.

公开(公告)号：WO2021173464A1

公开(公告)日：2021-09-02

申请号：PCT/US2021/018976

申请日：2021-02-22

Applicant: IMRA AMERICA, INC.

Inventor： FERMANN, Martin, E.

IPC: H04B10/2575

Abstract: Examples of systems and methods for integrated photonic broadband microwave receivers and transceivers are disclosed based on integrated coherent dual optical frequency combs. In some cases, when the system is configured as a receiver, the microwave spectrum of the input signal can be sliced into several spectral segments for low-bandwidth detection and analysis. In some cases, when the system is configured as a transmitter, multiple radio frequency (RF) carriers can be generated, which can be coherently added or encoded independently for transmission of individual microwave bands. In some systems, the optics-related functionalities can be achieved via integrated optic technology, for example, based on silicon photonics, providing tremendous possibilities for mass-production with significantly reduced system footprint.

公开(公告)号：WO2016048740A2

公开(公告)日：2016-03-31

申请号：PCT/US2015/050362

申请日：2015-09-16

Applicant: IMRA AMERICA, INC.

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

IPC: H01S3/105

CPC classification number: H01S3/1112 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/10061 ,  H01S3/105 ,  H01S3/106 ,  H01S3/1067 ,  H01S3/107 ,  H01S3/108 ,  H01S3/1115 ,  H01S3/1118 ,  H01S3/1305 ,  H01S3/1312 ,  H01S3/139 ,  H01S3/1608 ,  H01S3/2308 ,  H01S2301/02

Abstract: The present disclosure relates to the design of fiber frequency comb lasers with low carrier phase noise. Examples of these low carrier phase noise oscillators can be constructed from both soliton and dispersion compensated fiber lasers via the use of intra-cavity amplitude modulators such as graphene modulators. In low carrier phase noise dispersion compensated fiber frequency comb lasers, graphene and/or bulk modulators can further be used, for example, for phase locking of one comb line to an external continuous wave (cw) reference laser via high bandwidth control of the repetition rate of the comb laser via the graphene modulator. As a result a low phase noise radio frequency (RF) signal can be generated. In some implementations, a frequency comb exhibiting phase noise suppression of at least about 10 dB over a frequency range up to about 100 kHz is provided.

Abstract translation: 本公开涉及具有低载波相位噪声的光纤频梳激光器的设计。 这些低载波相位噪声振荡器的例子可以由孤子和色散补偿光纤激光器通过使用腔内振幅调制器如石墨烯调制器来构建。 在低载波相位噪声色散补偿光纤频梳激光器中，例如可以进一步使用石墨烯和/或体调制器，用于通过重复的高带宽控制将一条梳状线锁相至外部连续波（cw）参考激光器 梳状激光通过石墨烯调制器的速率。 结果可以产生低相位噪声射频（RF）信号。 在一些实施方式中，提供了频率梳，该频率梳在高达大约100kHz的频率范围内呈现至少约10dB的相位噪声抑制。

公开(公告)号：WO2015130651A1

公开(公告)日：2015-09-03

申请号：PCT/US2015/017245

申请日：2015-02-24

Applicant: IMRA AMERICA, INC.

Inventor： HORI, Takashi ,  FERMANN, Martin, E.

IPC: H01S3/00 ,  H01S3/067 ,  H01S3/16

CPC classification number: H01S3/06758 ,  G02F1/39 ,  G02F2001/392 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06708 ,  H01S3/1106 ,  H01S3/1608 ,  H01S3/1611 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/302 ,  H01S2301/08 ,  H01S2301/085

Abstract: In one aspect, the present disclosure describes a fiber laser system for the generation and delivery of femtosecond (fs) pulses in multiple wavelength ranges. For improved versatility in multi-photon microscopy, an example of a dual wavelength fiber system based on Nd fiber source providing gain at 920 and 1060 nm is described. An example of a three-wavelength system is included providing outputs at 780 nm, 940 nm, and 1050 nm. The systems include dispersion compensation so that high quality fs pulses are provided for applications in microscopy, for example in multiphoton microscope (MPM) systems.

Abstract translation: 一方面，本公开描述了用于在多个波长范围内产生和传送飞秒（fs）脉冲的光纤激光系统。 为了改善多光子显微镜的多功能性，描述了基于提供920和1060nm的增益的Nd光纤源的双波长光纤系统的示例。 包括三波长系统的实例包括提供780nm，940nm和1050nm的输出。 这些系统包括色散补偿，以便提供高质量的fs脉冲用于显微镜应用，例如在多光子显微镜（MPM）系统中。

公开(公告)号：WO2006057655A2

公开(公告)日：2006-06-01

申请号：PCT/US2005/008626

申请日：2005-03-14

Applicant: IMRA AMERICA, INC. ,  FERMANN, Martin, E. ,  IMESHEV, Gennady ,  CHO, Gyu Choen ,  LIU, Zhenlin ,  HARTER, Donald, J.

Inventor： FERMANN, Martin, E. ,  IMESHEV, Gennady ,  CHO, Gyu Choen ,  LIU, Zhenlin ,  HARTER, Donald, J.

IPC: H01S3/00

CPC classification number: H01S3/0057 ,  H01S3/0064 ,  H01S3/0078 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/06741 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094007 ,  H01S3/1086 ,  H01S3/1301 ,  H01S3/1608 ,  H01S3/1618 ,  H01S3/2308 ,  H01S3/2316 ,  H01S3/302

Abstract: By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved. Finally, by amplifying positively chirped pulses in negative dispersion fiber amplifiers, low noise wavelength tunable seed source via anti-Stokes frequency shifting can be obtained.

Abstract translation: 通过补偿光子晶体光纤脉冲压缩器中的偏振模色散以及色散，可以从全光纤啁啾脉冲放大系统获得高脉冲能量。 通过自相位调制在光纤放大器中产生三阶色散，可以补偿来自大容量光栅脉冲压缩器的三阶色散，可以提高混合光纤/体积啁啾脉冲放大系统的脉冲质量。 最后，通过在负色散光纤放大器中正向啁啾脉冲放大，可以获得经过反斯托克斯频移的低噪声波长可调种子源。

公开(公告)号：WO2005022705A2

公开(公告)日：2005-03-10

申请号：PCT/US2004/027808

申请日：2004-08-27

Applicant: IMRA AMERICA, INC. ,  FERMANN, Martin, E. ,  HARTL, Ingmar ,  IMESHEV, Gennady ,  PATEL, Rajesh, S.

Inventor： FERMANN, Martin, E. ,  HARTL, Ingmar ,  IMESHEV, Gennady ,  PATEL, Rajesh, S.

IPC: H01S

CPC classification number: G02F1/39 ,  B23K26/0622 ,  B23K26/0624 ,  G02F2001/3548 ,  G02F2001/392 ,  H01S3/0057 ,  H01S3/0604 ,  H01S3/06704 ,  H01S3/06725 ,  H01S3/06741 ,  H01S3/06758 ,  H01S3/08045 ,  H01S3/094007 ,  H01S3/115 ,  H01S3/2325 ,  H01S2301/03

Abstract: A fiber-based source for high-energy picosecond and nanosecond pulses is described. By minimizing nonlinear energy limitations in fiber amplifiers, pulse energies close to the damage threshold of optical fibers can be generated. The implementation of optimized seed sources in conjunction with amplifier chains comprising at least one nonlinear fiber amplifier allows for the generation of near bandwidth-limited high-energy picosecond pulses. Optimized seed sources for high-energy pulsed fiber amplifiers comprise semiconductor lasers as well as stretched mode locked fiber lasers. The maximization of the pulse energies obtainable from fiber amplifiers further allows for the generation of high-energy ultraviolet and IR pulses at high repetition rates.

Abstract translation: 描述了用于高能皮秒和纳秒脉冲的基于光纤的源。 通过最小化光纤放大器中的非线性能量限制，可以产生接近光纤损伤阈值的脉冲能量。 结合包括至少一个非线性光纤放大器的放大器链实现优化的种子源允许产生近带宽限制的高能皮秒脉冲。 用于高能脉冲光纤放大器的优化种子源包括半导体激光器以及拉伸模式锁定光纤激光器。 从光纤放大器获得的脉冲能量的最大化进一步允许以高重复率产生高能量的紫外和IR脉冲。

公开(公告)号：WO2005017955A2

公开(公告)日：2005-02-24

申请号：PCT/US2004/017458

申请日：2004-06-03

Applicant: IMRA AMERICA, INC. ,  FERMANN, Martin, E. ,  CHO, Gyu, C.

Inventor： FERMANN, Martin, E. ,  CHO, Gyu, C.

IPC: H01L

CPC classification number: H01S3/1118 ,  H01S3/005 ,  H01S3/06708 ,  H01S3/06712 ,  H01S3/094019 ,  H01S3/0941 ,  H01S3/1055

Abstract: 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.

Abstract translation: 具有增强的脉冲宽度控制的锁模线性光纤激光腔包括两个偏振保持和非偏振保持光纤的级联部分。 变形纤维布拉格光栅和集成光纤偏振器被包括在空腔中，以帮助线性偏振空腔的输出。 通过将光纤布拉格光栅的色散值与腔内光纤的色散相反来获得具有大光学带宽的非常短的脉冲。

公开(公告)号：WO2004109869A3

公开(公告)日：2004-12-16

申请号：PCT/US2004/014526

申请日：2004-05-24

Applicant: IMRA AMERICA, INC. ,  FERMANN, Martin, E. ,  IMESHEV, Gennady ,  HARTL, Ingmar ,  HARTER, Donald, J.

Inventor： FERMANN, Martin, E. ,  IMESHEV, Gennady ,  HARTL, Ingmar ,  HARTER, Donald, J.

IPC: H01S3/00

Abstract: By writing non-linear chirp into fiber Bragg gratings, greater control over dispersion compensation in CPA systems is obtained, such that, for example, the dispersion profile of the fiber Bragg grating and a bulk compressor may be matched. An iterative method of writing the fiber grating can reduce the group delay ripple to very low levels; and adaptive control of the fiber grating dispersion profile can further reduce these levels, while in addition offering greater acceptable yield in the manufacture of such gratings. Fiber Bragg gratings may be designed so as to provide customized pulse shapes optimized for various end uses, such as micromachining, for example, and may also be used to counteract gain-narrowing in a downstream amplifier.

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。