知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

28 records (took 0.013 seconds)

    Mode-locked upconversion laser source
    2.
    发明授权
    Mode-locked upconversion laser source 失效
    锁模上变频激光源

    公开(公告)号：US5271025A

    公开(公告)日：1993-12-14

    申请号：US926058

    申请日：1992-08-05

    Applicant: Stephen C. Rand

    Inventor： Stephen C. Rand

    IPC: H01S3/081 ,  H01S3/094 ,  H01S3/098 ,  H01S3/117 ,  H01S3/16 ,  H01S3/09

    CPC classification number: H01S3/094 ,  H01S3/081 ,  H01S3/094038 ,  H01S3/094092 ,  H01S3/1121 ,  H01S3/117 ,  H01S3/1608 ,  H01S3/165 ,  H01S3/1653

    Abstract: A laser source which operated under the principals of cooperative unconversion produces controllable optical pulses at wavelengths which are shorter than the wavelength of the laser energy which pumps the gain medium. The source is a solid-state laser which employs a five percent Er:LiYF.sub.4 crystal which is arranged in an astigmatically-compensated 3-mirror cavity. Pumping is achieved at 1.5 microns in the infrared, and the system operates in a continuous-wave, mode-locked fashion in the green spectral region at approximately 544 nm. The cooperative inversion mechanism involves energy pooling by trios of excited rare earth dopant ions in the laser medium. Q-switching is achieved with the use of intracavity amplitude modulation so as to achieve three-fold upconversion. A 3-mirror astigmatically-compensated cavity with the gain medium permits modulation of losses in a manner which cannot be achieved with known systems and achieves high stability.

    Abstract translation: 在协作非转换的原理下运行的激光源产生的波长比可以泵送增益介质的激光能量的波长短的可控光脉冲。 该源是固态激光器，其采用布置在散光补偿的3镜腔中的5％Er：LiYF4晶体。 在红外线中以1.5微米的速度实现泵送，并且系统以约544nm的绿色光谱区域中的连续波，锁模方式工作。 合作反演机制涉及在激光介质中通过激发的稀土掺杂剂离子的三聚体的能量收集。 通过使用腔内振幅调制实现Q开关，以实现三重向上转换。 具有增益介质的3镜式散光补偿腔允许以已知系统无法实现的方式调制损耗并实现高稳定性。

    Upconversion pumped lasers
    3.
    发明授权
    Upconversion pumped lasers 失效
    升压泵浦激光器

    公开(公告)号：US5022040A

    公开(公告)日：1991-06-04

    申请号：US607203

    申请日：1990-10-30

    Applicant: Slava A. Pollack ,  David B. Chang

    Inventor： Slava A. Pollack ,  David B. Chang

    IPC: H01S3/094 ,  H01S3/11 ,  H01S3/16

    CPC classification number: H01S3/11 ,  H01S3/08072 ,  H01S3/094038 ,  H01S3/094092 ,  H01S3/1608 ,  H01S3/1611 ,  H01S3/165 ,  H01S3/17

    Abstract: A laser incorporating a laser medium disposed within a laser cavity and a pumping arrangement for selectively applying excitation energy to said laser medium. The laser medium contains upconverting material of the type which allows for the exchange of energy between electrons of the lasing ions at a given energy state below the meta-stable initial lasing state so that some of said exchanging electrons are upconverted to energy states at or above the meta-stable initial lasing state. The pumping arrangement applies energy of suitable wavelength and intensity for elevating electrons from energy levels below the given state to that state in sufficient numbers to support substantial upconversion and the resulting lasing.

    Abstract translation: 一种激光器，其包括设置在激光腔内的激光介质和用于选择性地向所述激光介质施加激发能量的泵送装置。 激光介质包含上变频材料，其类型允许在低于等稳定的初始激光状态的给定能量状态下使激光离子的电子之间的能量交换，使得一些所述交换电子被上转换成等于或高于 元稳定的初始激光状态。 泵送装置施加适当的波长和强度的能量，用于将电子从低于给定状态的能级提升到足够数量的电压，以支持实质的上变频和所产生的激光。

    Four-fold and higher order continuous-wave upconversion lasers
    8.
    发明授权
    Four-fold and higher order continuous-wave upconversion lasers 失效
    四阶高阶连续波上变频激光器

    公开(公告)号：US5289481A

    公开(公告)日：1994-02-22

    申请号：US947111

    申请日：1992-09-18

    Applicant: Ping Xie ,  Stephen Rand

    Inventor： Ping Xie ,  Stephen Rand

    IPC: H01S3/081 ,  H01S3/094 ,  H01S3/098 ,  H01S3/117 ,  H01S3/16 ,  H01S3/14

    CPC classification number: H01S3/094 ,  H01S3/081 ,  H01S3/094038 ,  H01S3/094092 ,  H01S3/1121 ,  H01S3/117 ,  H01S3/1608 ,  H01S3/165 ,  H01S3/1653

    Abstract: Four-fold and higher order lasers pumped by multiphoton absorption, avalanche mechanisms, or other means of internal upconversion for continuous-wave and continuous-wave mode-locked lasers. A solid-state laser system is contained within an astigmatically compensated cavity containing first and second mirrors. The gain medium is formed of a crystal of lithium yttrium fluoride heavily doped (5%) with trivalent erbium, or another form of crystal, such as CaF.sub.2 where the dopant atoms are clustered in quartets. The crystal, in a lithium yttrium fluoride embodiment, is approximately 3 mm thick with both sides thereof being polished flat to a laser grade finish. A pumping source supplies a pumping energy having a wavelength of 1.5 .mu.m to the gain medium, which wavelength is considerable longer than the output wavelength (701.5 nm) of the laser system. The gain medium may additionally be an alkali vapor formed of Cesium or Rubidium.

    Abstract translation: 通过多光子吸收，雪崩机制或连续波和连续波模式锁定激光器的内部上变频的其他方式泵浦的四倍和更高阶激光器。 固态激光系统包含在包含第一和第二反射镜的散光补偿腔内。 增益介质是由三价铒重掺杂的钇氟化钇（5％）晶体或另一种形式的晶体（如掺杂剂原子聚集在四方中的CaF 2）形成的。 在氟化锂的锂化合物实施方案中，晶体的厚度约为3毫米，其两侧被平坦抛光至激光刻痕。 泵浦源向增益介质提供波长为1.5（my）m的泵浦能量，该波长比激光系统的输出波长（701.5nm）长得多。 增益介质还可以是由铯或铷形成的碱性蒸气。

Patent Agency Ranking