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    Diode pumped laser using gain mediums with strong thermal focussing
    6.
    发明公开
    Diode pumped laser using gain mediums with strong thermal focussing 审中-公开
    二极管泵浦激光器使用的增益介质具有强热聚焦

    公开(公告)号：EP1326312A3

    公开(公告)日：2003-07-16

    申请号：EP03075641.5

    申请日：1998-10-22

    申请人： SPECTRA-PHYSICS LASERS, INC.

    发明人： Nigham, William L. ,  Keirstead, Mark S. ,  Cheng, Emily

    IPC分类号： H01S3/0941 ,  H01S3/08

    CPC分类号： H01S3/09415 ,  H01S3/042 ,  H01S3/08045 ,  H01S3/0805 ,  H01S3/08072 ,  H01S3/1611 ,  H01S3/1673

    摘要： A diode pumped laser includes a resonator mirror (12) and an output coupler (14), defining a laser resonator (10) with a resonator optical axis (16). A strong thermal lens gain medium (24) with a TEM 00 mode diameter is mounted in the resonator along the resonator optical axis. The dopant level of the gain medium is in the range of 0.01 to less than 0.5 percent. A diode pump source (18) supplies a pump beam to the gain medium in the laser resonator, and produces an output beam with a diameter larger than the TEM 00 mode diameter to reduce thermal birefringence. A power source supplies power to the diode pump source. A polarizing element can be positioned in the resonator, along with an aperture stop. The laser operates well over a large range of pump powers. Its slope efficiency in the TEM 00 mode is greater than 40 %, with an overall efficiency greater than 25 %. One of the gain mediums used is Nd:YVO 4 . This material exhibits high gain and a short upper state lifetime. These properties make it attractive in designing a Q―switched laser, or one that is insensitive to optical feedback. Another material is Nd:NAG. The technique of optimizing the pump beam spot size is found to minimize loss due to thermal birefringence.

    DIODE-PUMPED LASER WITH FUNNEL-COUPLED PUMP SOURCE
    9.
    发明公开
    DIODE-PUMPED LASER WITH FUNNEL-COUPLED PUMP SOURCE 审中-公开
    具有漏斗形耦合泵浦源二极管泵浦激光器

    公开(公告)号：EP1149441A1

    公开(公告)日：2001-10-31

    申请号：EP00913233.3

    申请日：2000-01-14

    申请人： SPECTRA-PHYSICS LASERS, INC.

    发明人： HENRIE, Jason, D. ,  NIGHAN, William, L., Jr.

    IPC分类号： H01S3/0941

    CPC分类号： H01S3/0941 ,  H01S3/0401 ,  H01S3/042 ,  H01S3/094057 ,  H01S3/09415

    摘要： An optically pumped laser has a gain medium positioned inside of an optical resonator cavity (120) and disposed about a resonator optical axis (150). An optical pumping source (100) is positioned outside of the optical resonator cavity. A reflective coupler (110) with a coupler body, and an interior volume passing therethrough is positioned proximal to the optical pumping source. Light from the pumping source passes into an entrance aperture (180) of the reflective coupler to an exit aperture (190) of the reflective coupler positioned distal to the optical pumping source. The interior volume of the reflective coupler is bounded by a reflective surface (170), an entrance aperture and the exit aperture, and is substantially transparent to radiation from the optical pumping source. The reflective surface has a high reflectivity matched to radiation from the optical pumping source. The reflective coupler directs radiation from the optical pumping source into the optical resonator cavity and gain medium, conditioning the numerical aperture and spatial intensity distribution across the exit aperture.

    Q-switched laser system providing extra-cavity harmonically generated UV light
    10.
    发明公开
    Q-switched laser system providing extra-cavity harmonically generated UV light 失效
    红外光谱仪

    公开(公告)号：EP0854380A3

    公开(公告)日：1999-09-01

    申请号：EP98300112.4

    申请日：1998-01-08

    申请人： SPECTRA-PHYSICS LASERS, INC.

    发明人： Pieterse, Jan-Willem ,  Petersen, Alan B. ,  Pohalski, Chris ,  Cheng, Emily ,  Lane, Randall ,  Nighan, William L., Jr.

    IPC分类号： G02F1/37 ,  H01S3/11

    CPC分类号： H01S3/10 ,  G02F1/353 ,  G02F1/3534 ,  G02F1/37 ,  G02F2001/354 ,  G02F2201/16

    摘要： A diode pumped laser includes a high reflector and an output coupler defining a resonator. The resonator includes a gain medium and a Q-switch and produces a fundamental beam. A first non-linear crystal is positioned extra-cavity of the resonator along a path of the fundamental beam. The first non-linear crystal generates a second harmonic beam from the fundamental beam. The first non-linear crystal is critically phased matched. A second non-linear is portioned extra-cavity of the resonator along a path of the fundamental beam and the path of the second harmonic beam. The second non-linear crystal produces a third harmonic beam. The second non-linear crystal is critically phased matched.

    摘要翻译： 二极管泵浦激光器包括高反射器和限定谐振器的输出耦合器。 谐振器包括增益介质和Q开关，并产生基波束。 第一非线性晶体沿着基波束的路径被定位在谐振器的外腔。 第一个非线性晶体从基波束产生二次谐波。 第一个非线性晶体被严格分阶段匹配。 第二非线性晶体沿着基波束的路径和第二谐波束的路径被分成谐振器的外腔。 第二个非线性晶体产生三次谐波光束。 第二个非线性晶体被严格分阶段匹配。