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    • 1. 发明授权
    • Hybrid solid state laser system using a neodymium-based master oscillator and an ytterbium-based power amplifier
    • 使用基于钕的主振荡器和基于镱的功率放大器的混合固态激光系统
    • US06212215B1
    • 2001-04-03
    • US08409244
    • 1995-03-24
    • Stephen A. PayneChristopher D. MarshallHoward T. PowellWilliam F. Krupke
    • Stephen A. PayneChristopher D. MarshallHoward T. PowellWilliam F. Krupke
    • H01S314
    • H01S3/2308H01S3/1611H01S3/1618
    • In a master oscillator-power amplifier (MOPA) hybrid laser system, the master oscillator (MO) utilizes a Nd3+-doped gain medium and the power amplifier (PA) utilizes a diode-pumped Yb3+-doped material. The use of two different laser gain media in the hybrid MOPA system provides advantages that are otherwise not available. The Nd-doped gain medium preferably serves as the MO because such gain media offer the lowest threshold of operation and have already been engineered as practical systems. The Yb-doped gain medium preferably serves in the diode-pumped PA to store pump energy effectively and efficiently by virtue of the long emission lifetime, thereby reducing diode pump costs. One crucial constraint on the MO and PA gain media is that the Nd and Yb lasers must operate at nearly the same wavelength. The 1.047 &mgr;m Nd:YLF/Yb:S-FAP [Nd:LiYF4/Yb:Sr5(PO4)3F] hybrid MOPA system is a preferred embodiment of the hybrid Nd/Yb MOPA.
    • 在主振荡器功率放大器(MOPA)混合激光系统中,主振荡器(MO)利用Nd3 +掺杂增益介质,功率放大器(PA)利用二极管泵浦的Yb3 +掺杂材料。 在混合MOPA系统中使用两种不同的激光增益介质提供了另外不可用的优点。 Nd掺杂增益介质优选用作MO,因为这样的增益介质提供了最低的操作阈值,并且已经被设计为实际的系统。 Yb掺杂增益介质优选用于二极管泵浦PA,由于长的发射寿命,能够有效且高效地存储泵浦能量,从而降低二极管泵的成本。 MO和PA增益介质的一个关键因素是Nd和Yb激光器必须在几乎相同的波长下工作。 1.047μmNd:YLF / Yb:S-FAP [Nd:LiYF4 / Yb:Sr5(PO4)3F]杂化MOPA系统是混合Nd / Yb MOPA的优选实施方案。
    • 2. 发明授权
    • Optically pumped cerium-doped LiSrAlF.sub.6 and LiCaAlF.sub.6
    • 光泵浦铈掺杂LiSrAlF6和LiCaAlF6
    • US5517516A
    • 1996-05-14
    • US184944
    • 1994-01-21
    • Christopher D. MarshallStephen A. PayneWilliam F. Krupke
    • Christopher D. MarshallStephen A. PayneWilliam F. Krupke
    • H01S3/16
    • H01S3/16H01S3/1648
    • Ce.sup.3+ -doped LiSrAlF.sub.6 crystals are pumped by ultraviolet light which is polarized along the c axis of the crystals to effectively energize the laser system. In one embodiment, the polarized fourth harmonic light output from a conventional Nd:YAG laser operating at 266 nm is arranged to pump Ce:LiSrAlF.sub.6 with the pump light polarized along the c axis of the crystal. The Ce:LiSrAlF.sub.6 crystal may be placed in a laser cavity for generating tunable coherent ultraviolet radiation in the range of 280-320 nm. Additionally, Ce-doped crystals possessing the LiSrAlF.sub.6 type of chemical formula, e.g. Ce-doped LiCaAlF.sub.6 and LiSrGaF.sub.6, can be used. Alternative pump sources include an ultraviolet-capable krypton or argon laser, or ultraviolet emitting flashlamps. The polarization of the pump light will impact operation. The laser system will operate efficiently when light in the 280-320 nm gain region is injected or recirculated in the system such that the beam is also polarized along the c axis of the crystal. The Ce:LiSrAlF.sub.6 laser system can be configured to generate ultrashort pulses, and it may be used to pump other devices, such as an optical parametric oscillator.
    • Ce3 +掺杂的LiSrAlF6晶体被沿着晶体的c轴极化的紫外光泵浦,以有效激励激光系统。 在一个实施例中,从266nm工作的常规Nd:YAG激光器输出的偏振四次谐波被布置成泵浦Ce:LiSrAlF6,其中泵浦光沿着晶体的c轴偏振。 Ce:LiSrAlF6晶体可以放置在激光腔中,用于产生280-320nm范围内的可调谐相干紫外线辐射。 另外,Ce掺杂的晶体具有LiSrAlF6类型的化学式,例如。 可以使用Ce掺杂的LiCaAlF6和LiSrGaF6。 替代的泵浦源包括具有紫外线能力的氪或氩激光器或紫外线发射闪光灯。 泵浦光的极化会影响操作。 当280-320纳米增益区域内的光被注入或再循环到系统中时,激光系统将有效地工作,使得光束也沿着晶体的c轴极化。 Ce:LiSrAlF6激光系统可以配置为产生超短脉冲,可用于泵浦其他器件,如光参量振荡器。
    • 3. 发明授权
    • Blue diode-pumped solid-state-laser based on ytterbium doped laser crystals operating on the resonance zero-phonon transition
    • 基于在谐振零声子跃迁上操作的掺镱激光晶体的蓝色二极管泵浦固态激光器
    • US06304584B1
    • 2001-10-16
    • US09187327
    • 1998-11-06
    • William F. KrupkeStephen A. PayneChristopher D. Marshall
    • William F. KrupkeStephen A. PayneChristopher D. Marshall
    • H01S310
    • H01S3/08036H01S3/09415H01S3/109H01S3/1618H01S3/1675
    • The invention provides an efficient, compact means of generating blue laser light at a wavelength near ˜493+/−3 nm, based on the use of a laser diode-pumped Yb-doped laser crystal emitting on its zero phonon line (ZPL) resonance transition at a wavelength near ˜986+/−6 nm, whose fundamental infrared output radiation is harmonically doubled into the blue spectral region. The invention is applied to the excitation of biofluorescent dyes (in the ˜490-496 nm spectral region) utilized in flow cytometry, immunoassay, DNA sequencing, and other biofluorescence instruments. The preferred host crystals have strong ZPL fluorecence (laser) transitions lying in the spectral range from ˜980 to ˜992 nm (so that when frequency-doubled, they produce output radiation in the spectral range from 490 to 496 nm). Alternate preferred Yb doped tungstate crystals, such as Yb:KY(WO4)2, may be configured to lase on the resonant ZPL transition near 981 nm (in lieu of the normal 1025 nm transition). The laser light is then doubled in the blue at 490.5 nm.
    • 基于在其零声子线(ZPL)谐振上发射的激光二极管泵浦的Yb掺杂激光晶体的使用,本发明提供了以近似于493 +/- 3nm的波长产生蓝色激光的有效且紧凑的方法 在986 +/- 6nm附近的波长处的过渡,其基本红外输出辐射在蓝色光谱区域中被谐波地加倍。 本发明应用于流式细胞术,免疫测定,DNA测序和其他生物荧光仪器中使用的生物荧光染料(在〜490-496nm光谱区域)的激发。 优选的主体晶体在〜980〜〜992nm的光谱范围内具有强的ZPL荧光(激光)跃迁(因此当倍频时,它们在490至496nm的光谱范围内产生输出辐射)。 替代优选的Yb掺杂的钨酸盐晶体,例如Yb:KY(WO4)2,可以被配置为在接近981nm的谐振ZPL跃迁上(代替正常的1025nm跃迁)。 然后将激光以490.5nm的蓝色加倍。
    • 10. 发明授权
    • Transition-metal doped sulfide, selenide, and telluride laser crystal
and lasers
    • 过渡金属掺杂硫化物,硒化物和碲化物激光晶体和激光器
    • US5541948A
    • 1996-07-30
    • US346457
    • 1994-11-28
    • William F. KrupkeRalph H. PageLaura D. DeLoachStephen A. Payne
    • William F. KrupkeRalph H. PageLaura D. DeLoachStephen A. Payne
    • H01S3/16
    • H01S3/16H01S3/1621H01S3/1623H01S3/1628
    • A new class of solid state laser crystals and lasers are formed of transition metal doped sulfide, selenide, and telluride host crystals which have four fold coordinated substitutional sites. The host crystals include II-VI compounds. The host crystal is doped with a transition metal laser ion, e.g., chromium, cobalt or iron. In particular, Cr.sup.2+ -doped ZnS and ZnSe generate laser action near 2.3 .mu.m. Oxide, chloride, fluoride, bromide and iodide crystals with similar structures can also be used. Important aspects of these laser materials are the tetrahedral site symmetry of the host crystal, low excited state absorption losses and high luminescence efficiency, and the d.sup.4 and d.sup.6 electronic configurations of the transition metal ions. The same materials are also useful as saturable absorbers for passive Q-switching applications. The laser materials can be used as gain media in amplifiers and oscillators; these gain media can be incorporated into waveguides and semiconductor lasers.
    • 一类新型的固体激光晶体和激光器由过渡金属掺杂的硫化物,硒化物和碲化物主体晶体形成,它们具有四个重叠的配位置。 主体晶体包括II-VI化合物。 主体晶体掺杂有过渡金属激光离子,例如铬,钴或铁。 特别是Cr2 +掺杂的ZnS和ZnSe在2.3μm附近产生激光作用。 也可以使用具有相似结构的氧化物,氯化物,氟化物,溴化物和碘化物晶体。 这些激光材料的重要方面是主晶体的四面体位置对称性,低激发态吸收损耗和高发光效率,以及过渡金属离子的d4和d6电子结构。 相同的材料也可用作无源Q开关应用的可饱和吸收器。 激光材料可用作放大器和振荡器中的增益介质; 这些增益介质可以并入到波导和半导体激光器中。