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    • 3. 发明申请
    • SELF-SEEDING HIGH POWER LASER
    • 自拍高功率激光
    • WO2017062076A2
    • 2017-04-13
    • PCT/US2016/038520
    • 2016-06-21
    • RAYTHEON COMPANY
    • FILGAS, David, M.
    • H01S3/10023H01S3/0632H01S3/06791H01S3/07H01S3/08013H01S3/0805H01S3/08072H01S3/083H01S3/1003H01S3/10053H01S3/10084H01S3/10092H01S3/105H01S3/1053H01S3/1065H01S3/1307H01S3/136
    • A self-seeding high power laser includes a spatial filter; an optical relay for circulating a low power un-distorted optical beam, an adaptive optic optically coupled to the output of the optical relay; a high power amplifier optically coupled to an output of the adaptive optic phase control element, wherein adaptively modified phasefront injected by the adaptive optic cancels distortions produced by the high power amplifier; a beamsplitter optically coupled to the high power amplifier for splitting the high power un-distorted optical beam into a high power output beam as the output of the self-seeding high power laser, and a low power beam; a focusing lens; a detector for detecting a metric of the low power beam; and a controller for adaptively controlling the adaptive optic to maximize the power of the high power amplifier, based on the detected metric.
    • 自播式大功率激光器包括空间滤波器; 用于循环低功率未失真光束的光学继电器,光学耦合到光学继电器的输出的自适应光学器件; 光耦合到所述自适应光学相位控制元件的输出的高功率放大器,其中由所述自适应光学器件注入的自适应地修改的前沿消除由所述高功率放大器产生的失真; 光耦合到高功率放大器的分束器,用于将高功率未失真光束分解为高功率输出光束,作为自种子大功率激光器的输出和低功率光束; 聚焦透镜; 用于检测低功率光束的度量的检测器; 以及控制器,用于根据检测到的度量自适应地控制自适应光学器件以使大功率放大器的功率最大化。
    • 4. 发明申请
    • AN AMPLIFYING OPTICAL DEVICE
    • 放大光学器件
    • WO2017021673A1
    • 2017-02-09
    • PCT/GB2016/000145
    • 2016-08-04
    • SPI LASERS UK LIMITED
    • ZERVAS, Mikhail, NickolaosCODEMARD, Christophe, AndréGHIRINGHELLI, FabioVARNHAM, Malcolm, Paul
    • H01S3/067H01S3/094H01S3/10
    • H01S3/06754H01S3/06729H01S3/0675H01S3/094007H01S3/094011H01S3/094019H01S3/094053H01S3/10023
    • An amplifying optical device (10) for providing optical amplification, the amplifying optical device (10) comprising at least one pump (11) for supplying pump radiation, at least one pump optical fibre (1) and at least one amplifying optical fibre (2), the amplifying optical device (10) being such that: the pump optical fibre (1) and the amplifying optical fibre (2) are coated with a common coating (3) and are in optical contact along a portion of their length (4), the pump optical fibre (1) is separated from the amplifying optical fibre (2) at two end portions (5, 6) of the common coating (3), one of the separated end portions (5) of the pump optical fibre (1) is connected to the pump (11), the pump optical fibre (1) and the amplifying optical fibre (2) comprise glass (7), the amplifying optical fibre (2) comprises a core (8) and a cladding (9), the core (8) is doped with at least one rare earth dopant (12), and the amplifying optical device (10) being characterized in that: the pump optical fibre (1) comprises a mode coupling means (15) in the form of a variation of refractive index with azimuth along at least one circle of constant radius, which variation has at least one azimuthal harmonic having an amplitude greater than an amplitude of a first and a second azimuthal harmonic, and which thereby couples guided modes of the pump optical fibre (1) to guided modes of the amplifying optical fibre (2) that overlap and can be absorbed by the rare earth dopant (12) in the core (8).
    • 一种用于提供光放大的放大光学装置(10),所述放大光学装置(10)包括至少一个用于提供泵浦辐射的泵(11),至少一个泵浦光纤(1)和至少一个放大光纤 ),放大光学装置(10)使得:泵浦光纤(1)和放大光纤(2)涂覆有公共涂层(3),并沿其长度的一部分(4)光学接触 ),泵浦光纤(1)在公共涂层(3)的两个端部(5,6)处与放大光纤(2)分离,泵浦光纤的分离端部(5)中的一个 (1)连接到泵(11),泵浦光纤(1)和放大光纤(2)包括玻璃(7),放大光纤(2)包括芯(8)和包层 如图9所示,芯(8)掺杂有至少一种稀土掺杂剂(12),放大光学器件(10)的特征在于:泵 光纤(1)包括具有沿着恒定半径的至少一个圆周的方位角的折射率变化形式的模式耦合装置(15),该变化具有至少一个方位角谐波,其幅度大于 第一和第二方位角谐波,从而将泵浦光纤(1)的引导模式耦合到放大光纤(2)的引导模式,该引导模式重叠并可被芯中的稀土掺杂剂(12)吸收 8)。
    • 8. 发明申请
    • LASER AMPLIFIER SYSTEM USING ACTIVE TAPERS
    • 激光放大器系统
    • WO2013138364A1
    • 2013-09-19
    • PCT/US2013/030569
    • 2013-03-12
    • NLIGHT PHOTONICS CORPORATION
    • SARACCO, MatthieuFARMER, Jason, N.KEENEY, Scott, H.MCCOMB, Timothy, S.PRICE, R., KirkLACHAPELLE, Joseph, G.
    • H01S3/067
    • H01S3/06745G02B6/14H01S3/0057H01S3/0092H01S3/06704H01S3/06729H01S3/06754H01S3/10023H01S3/2316
    • Nonlinear optical systems include fiber amplifiers using tapered waveguides such as optical fibers that permit multimode propagation but produce amplification and oscillation in a fundamental mode. The tapered waveguides generally are provided with an active dopant that is pumped with an optical pump source such as one or more semiconductor lasers. The active waveguide taper is selected to taper from a single or few mode section to a multimode section, and a seed beam in a fundamental mode is provided to a section of the waveguide taper associated with a smaller optical mode. An amplified beam exits the waveguide taper at a section associated with a larger optical mode. The amplified beam is directed to nonlinear conversion optics such as one or more nonlinear crystals to produce high peak power and high beam quality converted light using second or third harmonic generation, or other nonlinear processes. Hybrid laser systems include fiber amplifiers using tapered waveguides and solid-state amplifiers. Typically, such systems represent a technically simple and low cost approach to high peak power pulsed laser systems. The tapered waveguides generally are provided with an active dopant such as a rare earth element that is pumped with one or more semiconductor lasers. The active waveguide taper is selected to taper from a single or few mode section to a multimode section. A seed beam in a fundamental mode is provided to a section of the waveguide taper associated with a smaller optical mode, and an amplified beam exits the waveguide taper at a section associated with a larger optical mode. The waveguide taper permits amplification to higher peak power values than comparable small mode area fibers. The fiber amplified beam is then directed to a solid state amplifier, such as a thin disk or rod-type laser amplifier.
    • 非线性光学系统包括使用锥形波导的光纤放大器,例如允许多模传播但在基模中产生放大和振荡的光纤。 锥形波导通常设置有用诸如一个或多个半导体激光器的光泵浦源泵浦的有源掺杂剂。 选择有源波导锥度从单个或几个模式部分逐渐变细到多模式部分,并且将基本模式的种子束提供给与较小光学模式相关联的波导锥形部分。 放大的光束在与更大的光学模式相关联的部分处离开波导锥形。 放大的光束被引导到诸如一个或多个非线性晶体的非线性转换光学器件,以使用二次或三次谐波产生或其它非线性处理产生高峰值功率和高光束质量转换光。 混合激光系统包括使用锥形波导和固态放大器的光纤放大器。 通常,这样的系统代表了对高峰值功率脉冲激光系统的技术上简单和低成本的方法。 锥形波导通常设置有有源掺杂剂,例如用一个或多个半导体激光器泵浦的稀土元素。 选择有源波导锥度从单个或几个模式部分到多模部分逐渐变细。 以与较小的光学模式相关联的波导锥度的一部分提供基本模式的种子束,并且放大的光束在与更大的光学模式相关联的部分处离开波导锥形。 波导锥度允许放大到比可比较的小模面积光纤更高的峰值功率值。 光纤放大光束然后被引导到固态放大器,例如薄盘或棒式激光放大器。
    • 9. 发明申请
    • 光増幅制御装置及びその制御方法
    • 光放大控制装置及其控制方法
    • WO2013042321A1
    • 2013-03-28
    • PCT/JP2012/005500
    • 2012-08-30
    • 日本電気株式会社高橋 友理恵
    • 高橋 友理恵
    • H04B10/17H01S3/10H01S3/131H04B10/08
    • H01S3/10023H01S3/10015H01S3/1301H04B10/2939H04J14/021H04J14/0221H04J14/0241
    •  光増幅制御装置は、自ノード又は直近ノードにおいて所定波長の付加光信号が付加された光信号を分岐する第1分岐手段と、第1分岐手段により分岐された一方の光信号から付加光信号を抽出する第1フィルタ手段と、第1分岐手段により分岐された他方の光信号を増幅する増幅手段と、増幅手段により増幅された光信号を分岐する第2分岐手段と、第2分岐手段により分岐された一方の光信号から付加光信号を抽出する第2フィルタ手段と、第1フィルタ手段により抽出された付加光信号と、第2フィルタ手段により抽出された付加光信号と、に基づいて増幅手段の自動利得制御を行う第1制御手段と、を備える。
    • 光放大控制装置具有:第一分支装置,其分支具有预定波长的附加光信号的光信号在其自身节点或附近节点处相加; 第一滤波装置,从由第一分支装置分支的光信号之一提取附加光信号; 放大装置,放大由第一分支装置分支的另一光信号; 第二分支装置,其分支由放大装置放大的光信号; 第二滤波装置,从由第二分支装置分支的光信号之一提取附加光信号; 以及第一控制装置,其基于由第一滤波装置提取的附加光信号和由第二滤波装置提取的附加光信号执行放大装置的自动增益控制。