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    INTEGRATED PHOTONIC MICROWAVE SAMPLING SYSTEM
    1.
    发明申请
    INTEGRATED PHOTONIC MICROWAVE SAMPLING SYSTEM 有权

    公开(公告)号：US20210266063A1

    公开(公告)日：2021-08-26

    申请号：US17183054

    申请日：2021-02-23

    申请人： IMRA America, Inc.

    发明人： Martin E. Fermann

    IPC分类号： H04B10/073 ,  H04J14/02

    摘要： 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.

    Compact ultra-short pulse source amplifiers
    7.
    发明授权
    Compact ultra-short pulse source amplifiers 有权
    紧凑型超短脉冲源放大器

    公开(公告)号：US09553421B2

    公开(公告)日：2017-01-24

    申请号：US14571367

    申请日：2013-10-16

    申请人： IMRA AMERICA, INC.

    发明人： Martin E. Fermann

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

    CPC分类号： 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

    摘要： 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.

    摘要翻译： 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。

    COMPACT FIBER SHORT PULSE LASER SOURCES
    8.
    发明申请
    COMPACT FIBER SHORT PULSE LASER SOURCES 有权
    紧凑光纤短脉冲激光源

    公开(公告)号：US20160248217A1

    公开(公告)日：2016-08-25

    申请号：US15146675

    申请日：2016-05-04

    申请人： IMRA America, Inc.

    发明人： Martin E. Fermann

    IPC分类号： H01S3/11 ,  H01S3/16 ,  H01S3/106 ,  H01S3/13 ,  H01S3/067 ,  H01S3/1055

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

    摘要： 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.

    摘要翻译： 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。

    POLARIZING AND POLARIZATION MAINTAINING LEAKAGE CHANNEL FIBERS
    9.
    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：US20160245989A1

    公开(公告)日：2016-08-25

    申请号：US15146693

    申请日：2016-05-04

    申请人： IMRA America, Inc.

    发明人： Shigeru Suzuki ,  Hugh A. McKay ,  Martin E. Fermann

    IPC分类号： G02B6/024 ,  G02B6/036 ,  G02B6/02

    CPC分类号： G02B6/024 ,  G02B6/02009 ,  G02B6/02042 ,  G02B6/02314 ,  G02B6/02319 ,  G02B6/02342 ,  G02B6/02357 ,  G02B6/03694

    摘要： This disclosure relates to polarizing optical fibers and polarization maintaining optical fibers, including active and/or passive implementations. An embodiment includes a polarizing (PZ) optical fiber that includes stress applying parts (SAPs) disposed in a first cladding region, the SAPs comprising a material with a thermal expansion coefficient, αSAP. A core region is at least partially surrounded by cladding features and the SAPs. The core includes glass with a thermal expansion coefficient, αcore. The arrangement of the SAPs satisfies: Rsc=dSAP/Dsc, where Dsc is the SAP center to core center distance, and dSAP is the average SAP diameter, and dα=|αSAP−αcore|, and where Rsc and dα may be sufficiently large to induce stress birefringence into the core and to provide for 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.

    摘要翻译： 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。 一个实施例包括偏振（PZ）光纤，其包括设置在第一包层区域中的应力施加部分（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：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= |αSAP-αcore|，其中Rsc和dα可能足够大 以引起应力双折射到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。