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    HIGH-POWER, SINGLE-MODE FIBER SOURCES
    3.
    发明申请
    HIGH-POWER, SINGLE-MODE FIBER SOURCES 审中-公开

    公开(公告)号：US20180175578A1

    公开(公告)日：2018-06-21

    申请号：US15810506

    申请日：2017-11-13

    申请人： Dahv A.V. Kliner ,  Roger L. Farrow

    发明人： Dahv A.V. Kliner ,  Roger L. Farrow

    IPC分类号： H01S3/067 ,  H01S3/08 ,  H01S3/094

    CPC分类号： H01S3/06729 ,  H01S3/06733 ,  H01S3/0675 ,  H01S3/08045 ,  H01S3/094007 ,  H01S3/09408

    摘要： An optical apparatus includes one or more pump sources situated to provide laser pump light, and a gain fiber optically coupled to the one or more pump sources, the gain fiber including an actively doped core situated to produce an output beam, an inner cladding and outer cladding surrounding the doped core and situated to propagate pump light, and a polymer cladding surrounding the outer cladding and situated to guide a selected portion of the pump light coupled into the inner and outer claddings of the gain fiber. Methods of pumping a fiber sources include generating pump light from one or more pump sources, coupling the pump light into a glass inner cladding and a glass outer cladding of a gain fiber of the fiber source such that a portion of the pump light is guided by a polymer cladding surrounding the glass outer cladding, and generating a single-mode output beam from the gain fiber.

    Q-switched laser system and method to prevent seeding from pre-lasing
    7.
    发明授权
    Q-switched laser system and method to prevent seeding from pre-lasing 有权
    Q开关激光系统和防止预激光播种的方法

    公开(公告)号：US09373929B2

    公开(公告)日：2016-06-21

    申请号：US11629516

    申请日：2006-10-18

    申请人： David Legge

    发明人： David Legge

    IPC分类号： H01S3/11 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/16

    CPC分类号： H01S3/11 ,  H01S3/0804 ,  H01S3/08045 ,  H01S3/094076 ,  H01S3/0941 ,  H01S3/10038 ,  H01S3/1611 ,  H01S3/1643

    摘要： A method for preventing spatial or spectral beam seeding in a Q-switched laser is described. The Q-switch trigger of the laser is delayed by several laser resonator lifetimes after the end of the pump pulse. In this way, beam seeding is completely eliminated whilst pre-lase is maintained. The method described may be used for any laser system where the fall time of the pump radiation is sufficiently fast with respect to the upper state lifetime of the laser medium.

    摘要翻译： 描述了一种用于防止Q开关激光器中的空间或光谱束入射的方法。 激光器的Q开关触发器在泵浦脉冲结束后延迟几个激光谐振器寿命。 以这种方式，光束接种被完全消除，同时保持预激光。 所描述的方法可以用于任何激光系统，其中泵浦辐射的下降时间相对于激光介质的上部状态寿命足够快。

    Systems and techniques for compensation for the thermo-optic effect in active optical fibers
    8.
    发明授权
    Systems and techniques for compensation for the thermo-optic effect in active optical fibers 有权
    用于补偿有源光纤热光效应的系统和技术

    公开(公告)号：US09325151B1

    公开(公告)日：2016-04-26

    申请号：US14670806

    申请日：2015-03-27

    申请人： OFS FITEL, LLC

    发明人： John M Fini ,  Supradeepa V. S. Ramakrishna

    IPC分类号： H01S3/067 ,  H01S3/13 ,  H01S3/102 ,  H01S3/10

    CPC分类号： H01S3/102 ,  H01S3/06704 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/08045 ,  H01S3/08072

    摘要： A technique is described for providing compensation for the thermo-optic effect in a large-mode-area optical fiber, filter fiber, or the like. An optical fiber is provided having a refractive index profile with ambient temperature loss characteristics including a low loss for a first type of light and a high loss for a second type of light. A hot region of the fiber connected into an optical system is identified, in which a thermal index gradient is induced in the fiber. The thermal index gradient, in the absence of a compensating index gradient, would result in degradation of the fiber's ambient temperature loss characteristics. The fiber is arranged according to a layout having a position-varying bending diameter. Throughout the identified hot region, the fiber has a compensating bending diameter that induces a compensating index gradient in the fiber. Outside of the identified hot region, the fiber has an applied operating bending diameter that maintains the fiber's ambient temperature loss characteristics.

    摘要翻译： 描述了用于对大模式区域光纤，滤波光纤等中的热光效应进行补偿的技术。 提供一种具有折射率分布的光纤，其环境温度损失特性包括第一类光的低损耗和第二类光的高损耗。 识别连接到光学系统中的光纤的热区域，其中在光纤中感应出热指数梯度。 在没有补偿指数梯度的情况下，热指数梯度将导致光纤环境温度损失特性的退化。 纤维根据具有位置变化弯曲直径的布局布置。 在所识别的热区域中，纤维具有补偿弯曲直径，其在纤维中引起补偿的折射率梯度。 在所识别的热区域之外，纤维具有施加的操作弯曲直径，其保持纤维的环境温度损失特性。

    UV-green converting fiber laser using active tapers
    9.
    发明授权
    UV-green converting fiber laser using active tapers 有权
    UV-green转换光纤激光器采用有源锥度

    公开(公告)号：US09285541B2

    公开(公告)日：2016-03-15

    申请号：US13418255

    申请日：2012-03-12

    申请人： Matthieu Saracco ,  Jason N. Farmer ,  Scott H. Keeney ,  Timothy S. McComb

    发明人： Matthieu Saracco ,  Jason N. Farmer ,  Scott H. Keeney ,  Timothy S. McComb

    IPC分类号： G02B6/14 ,  H01S3/00 ,  H01S3/067 ,  H01S3/08 ,  H01S3/0941 ,  H01S3/16

    CPC分类号： G02B6/14 ,  H01S3/0092 ,  H01S3/06745 ,  H01S3/06754 ,  H01S3/08045 ,  H01S3/09415 ,  H01S3/1618 ,  H01S2301/03

    摘要： 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.

    摘要翻译： 非线性光学系统包括使用诸如允许多模传播但在基模中产生放大和振荡的光纤的锥形波导的光纤放大器。 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。 有源波导锥度被选择为从单个或几个模式部分到多模部分逐渐变细，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度的一部分。 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，以产生使用二次或三次谐波产生或其它非线性处理的高峰值功率和高光束质量转换光。