中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

31 records (took 0.027 seconds)

    POLARIZING AND POLARIZATION MAINTAINING LEAKAGE CHANNEL FIBERS
    2.
    发明申请
    POLARIZING AND POLARIZATION MAINTAINING LEAKAGE CHANNEL FIBERS 审中-公开
    极化和极化维护泄漏通道纤维

    公开(公告)号：WO2015077021A1

    公开(公告)日：2015-05-28

    申请号：PCT/US2014/064066

    申请日：2014-11-05

    Applicant: IMRA AMERICA, INC

    Inventor： SUZUKI, Shigeru ,  MCKAY, Hugh, A ,  FERMANN, Martin, E.

    IPC: G02B6/036 ,  G02B6/02 ,  G02B6/10

    CPC classification number: G02B6/024 ,  G02B6/02009 ,  G02B6/02042 ,  G02B6/02314 ,  G02B6/02319 ,  G02B6/02342 ,  G02B6/02357 ,  G02B6/03694

    Abstract: This disclosure relates to polarizing optical fibers and polarization maintaining optical fibers, including active and/or passive implementations. At least one embodiment includes a polarizing (PZ) optical fiber. The fiber includes stress applying parts (SAPs) disposed in a first cladding region, the SAPs comprising a material with a thermal expansion coefficient, α SAP . A core region is at least partially surrounded by cladding features and the SAPs. The core includes a glass with a thermal expansion coefficient, α core. The arrangement of the SAPs satisfies the relations: R sc = d SAP /D sc, where D sc is the SAP center to core center distance, and d SAP is the average SAP diameter, and dα = lα SAP - α core l- In various embodiments, Rsc and dα are sufficiently large to induce stress birefringence into the core and to provide for a polarized output. Active fibers in which a portion of the fiber is doped may be implemented for application in fiber lasers, fiber amplifiers, and/or optical pulse compressors.

    Abstract translation: 本公开涉及偏振光纤和偏振维持光纤，包括有源和/或无源实现。 至少一个实施例包括偏振（PZ）光纤。 纤维包括设置在第一包层区域中的应力施加部件（SAP），SAP包括具有热膨胀系数的材料αSAP。 核心区域至少部分地被包层特征和SAP包围。 核心包括具有热膨胀系数αcore的玻璃。 SAP的排列满足关系：Rsc = dSAP / Dsc，其中Dsc是SAP中心到核心中心距离，dSAP是平均SAP直径，dα=1αSAP-α核心。在各种实施方案中，Rsc和dα是 足够大以将应力双折射引入芯中并提供偏振输出。 一部分光纤被掺杂的有源光纤可以实现用于光纤激光器，光纤放大器和/或光脉冲压缩机中。

    COMPACT FIBER SHORT PULSE LASER SOURCES
    4.
    发明申请
    COMPACT FIBER SHORT PULSE LASER SOURCES 审中-公开
    紧凑光纤短脉冲激光源

    公开(公告)号：WO2015073257A1

    公开(公告)日：2015-05-21

    申请号：PCT/US2014/063822

    申请日：2014-11-04

    Applicant: IMRA AMERICA, INC.

    Inventor： FERMANN, Martin, E.

    IPC: H01S3/11 ,  H01S3/107 ,  H01S3/16 ,  H01S3/067 ,  H01S3/1055 ,  H01S3/106 ,  H01S3/13

    CPC classification number: H01S3/1112 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/0675 ,  H01S3/1055 ,  H01S3/1067 ,  H01S3/107 ,  H01S3/1115 ,  H01S3/1307 ,  H01S3/161 ,  H01S3/1616 ,  H01S2301/085

    Abstract: Examples of robust self-starting passively mode locked fiber oscillators are described. In certain implementations, the oscillators are configured as Fabry-Perot cavities containing an optical loop mirror on one cavity end and a bulk mirror or saturable absorber on the other end. The loop mirror can be further configured with an adjustable line phase delay to optimize modelocking. All intra-cavity fiber(s) can be polarization maintaining. Dispersion compensation components such as, e.g., dispersion compensation fibers, bulk diffraction gratings or fiber Bragg gratings may be included. The oscillators may include a bandpass filter to obtain high pulse energies when operating in the similariton regime. The oscillator output can be amplified and used whenever high power short pulses are required. For example the oscillators can be configured as frequency comb sources or supercontinuum sources. In conjunction with repetition rate modulation, applications include dual scanning delay lines and trace gas detection.

    Abstract translation: 描述了鲁棒自启动被动模式锁定光纤振荡器的示例。 在某些实施方案中，振荡器被配置为在一个空腔端部上包含光学环路镜和另一端的体镜或可饱和吸收体的法布里 - 珀罗腔。 环路镜可进一步配置有可调线路相位延迟以优化锁模。 所有腔内光纤可以是偏振维持。 可以包括色散补偿组件，例如色散补偿光纤，体衍射光栅或光纤布拉格光栅。 振荡器可以包括带通滤波器，以在相似状态下操作时获得高脉冲能量。 只要需要高功率短脉冲，振荡器输出就可以被放大和使用。 例如，振荡器可以配置为频率梳源或超连续谱源。 结合重复率调制，应用包括双扫描延迟线和痕量气体检测。

    PULSED LASER SOURCES
    7.
    发明申请
    PULSED LASER SOURCES 审中-公开
    脉冲激光源

    公开(公告)号：WO2005048417A2

    公开(公告)日：2005-05-26

    申请号：PCT/US2004/038652

    申请日：2004-11-10

    Applicant: IMRA AMERICA, INC.

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

    IPC: H01S

    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: Various embodiments include modelocked fiber laser resonators that may be coupled with optical amplifiers. An isolator may separate the laser resonator from the amplifier, although certain embodiments exclude such an isolator. A reflective optical element on one end of the resonator having a relatively low reflectivity may be employed to couple light from the laser 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 be 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 fiber Bragg grating to the inverse of the dispersion of the intra-cavity fiber. Frequency comb sources may be constructed from such modelocked fiber oscillators. In various exemplary embodiments, low dispersion and an in-line interferometer that provides feedback, assist in controlling the frequency components output from the comb source.

    Abstract translation: 各种实施例包括可与光放大器耦合的锁模光纤激光谐振器。 隔离器可以将激光谐振器与放大器分离，尽管某些实施例不包括这种隔离器。 可以使用具有相对较低反射率的谐振器的一端上的反射光学元件将来自激光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被包括在激光腔中，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。 频率梳源可以由这种锁模光纤振荡器构成。 在各种示例性实施例中，提供反馈的低色散和在线干涉仪有助于控制从梳状源输出的频率分量。

    PRECISION LIGHT SOURCE
    8.
    发明申请
    PRECISION LIGHT SOURCE 审中-公开

    公开(公告)号：WO2021126575A1

    公开(公告)日：2021-06-24

    申请号：PCT/US2020/063575

    申请日：2020-12-07

    Applicant: IMRA AMERICA, INC.

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

    IPC: H01S3/00 ,  H01S3/0057 ,  H01S5/02251 ,  H01S5/06253 ,  H01S5/0657

    Abstract: A pulse transformer for modifying the amplitude and phase of short optical pulses includes a pulse source and an adaptively controlled stretcher or compressor including at least one fiber Bragg grating (FBG) configured to receive pulses from the pulse source and having a first second-order dispersion parameter (D21). The pulse transformer further includes at least one optical amplifier configured to receive pulses from the FBG and a compressor configured to receive pulses from the at least one optical amplifier. The compressor has a second second-order dispersion parameter (‑D22), an absolute value of the first second-order dispersion parameter (|D21|) and an absolute value of the second second-order dispersion parameter (|‑D22|) that are substantially equal to one another to within 10%.

Patent Agency Ranking