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    • 41. 发明申请
    • EFFICIENT PHASE CONJUGATE LASER
    • 有效的相位激光
    • WO1987005751A1
    • 1987-09-24
    • PCT/US1987000202
    • 1987-02-02
    • HUGHES AIRCRAFT COMPANY
    • HUGHES AIRCRAFT COMPANYBRUESSELBACH, Hans, W.
    • H01S03/10
    • H01S3/2333H01S3/10076
    • A laser apparatus (10) utilizing a master oscillator power amplifier configuration wherein a master oscillator (12) provides a source of low energy, high phase front quality, and high spectral purity radiation, injected into at least one lasing medium gain element (14) disposed along an optical path. Coupling means (16) is positioned to selectively couple a predetermined percentage of the master oscillator (12) radiation into the gain element (14) medium while preventing all but a predetermined percentage of any amplified radiation exiting the gain element (14) from re-entering the master oscillator (12). Phase conjugation means (20) is disposed along the optical path on the opposite side of the gain element (14) as the coupling means (16), for reflecting the phase conjugate of laser radiation incident thereon. Delay means positioned between the gain element (14) and the phase conjugation means (16) assures that radiation pulses coupled along the optical path traverse and substantially exit from the gain element (14), toward the phase conjugation means (20), before any reflected radiation from the phase conjugation means (20) enters the gain element (14).
    • 44. 发明申请
    • PASSIVE DEVICE AND METHOD FOR THE COHERENT COMBINATION OF A PLURALITY OF OPTICAL AMPLIFIERS
    • 被动装置和用于多个光放大器的相干组合的方法
    • WO2013007945A3
    • 2013-06-06
    • PCT/FR2012051631
    • 2012-07-10
    • ECOLE POLYTECHPAPADOPOULOS DIMITRISHANNA MARCDANIAULT LOUIS
    • PAPADOPOULOS DIMITRISHANNA MARCDANIAULT LOUIS
    • H01S3/23H01S3/07H01S3/081
    • H01S3/005G02B27/283H01S3/0064H01S3/06758H01S3/1618H01S3/165H01S3/23H01S3/2308H01S3/2316H01S3/2325H01S3/2333
    • The invention relates to a passive device for the coherent combination of at least two optical amplifiers. According to the invention, said device comprises an interferometer having at least four branches (B1, B2, B3, B4) and comprising optical means for separating and combining polarisation, said means having four inlet-outlet ports that are respectively connected to a branch. The first branch comprises a first polarisation means, a first optical amplifier and a first mirror; the second branch comprises a second polarisation means, a second optical amplifier and a second mirror; the third branch comprises a third polarisation means and a third mirror; the fourth branch (B4) is an inlet-outlet branch of the interferometer; and the first, second and third polarisation means are designed such that a polarised optical beam entering respectively into the first, second or third branch and reflected by the mirror at the end of said branch forms a polarised optical beam that leaves said branch with a polarisation that is orthogonal to the polarisation of the polarised optical beam entering said branch.
    • 本发明涉及一种用于至少两个光放大器的相干组合的无源装置。 根据本发明,所述设备包括具有至少四个分支(B1,B2,B3,B4)并且包括用于分离和组合偏振的光学装置的干涉仪,所述装置具有分别连接到分支的四个入口 - 出口端口。 第一支路包括第一偏振装置,第一光放大器和第一反射镜; 第二分支包括第二偏振装置,第二光放大器和第二镜; 第三分支包括第三偏振装置和第三反射镜; 第四分支(B4)是干涉仪的入口 - 出口分支; 并且第一,第二和第三偏振装置被设计成使得分别进入第一,第二或第三分支并在所述分支的末端被反射镜反射的偏振光束形成偏振光束,该偏振光束以偏振方式离开所述分支 这与进入所述分支的偏振光束的偏振正交。
    • 45. 发明申请
    • RADIATION SOURCE
    • 辐射源
    • WO2013029895A1
    • 2013-03-07
    • PCT/EP2012/064775
    • 2012-07-27
    • ASML NETHERLANDS B.V.WAGNER, ChristianLOOPSTRA, Erik
    • WAGNER, ChristianLOOPSTRA, Erik
    • H01S3/00G03F7/20H05G2/00
    • H05G2/008G02B27/283G03F7/70025G03F7/70033G03F7/70983H01S3/0064H01S3/2316H01S3/2333H05G2/003H05G2/005
    • According to a first aspect of the present invention, there is provided a radiation source comprising: a nozzle configured to direct a stream of fuel droplets (70) along a trajectory towards a plasma formation location; a laser configured to direct laser radiation at a fuel droplet at the plasma formation location to generate, in use, a radiation generating plasma; wherein the laser comprises: a seed laser (50) for providing a seed laser beam (52); a beam splitter (54) for receiving the seed laser beam from the seed laser; an optical amplifier (58) for receiving the seed laser beam from the beam splitter and performing optical amplification; a first reflector (60) located downstream of the optical amplifier, configured to direct the seed laser beam back through the optical amplifier and on to the beam splitter; and a second reflector (70) located further downstream of the beam splitter, configured to receive the seed laser beam from the beam splitter and to direct at least a portion of the seed laser beam back toward the beam splitter.
    • 根据本发明的第一方面,提供了一种辐射源,包括:喷嘴,被配置为沿着轨迹朝着等离子体形成位置引导燃料液滴流(70); 激光器,被配置为在等离子体形成位置处的燃料液滴处引导激光辐射,以在使用中产生辐射产生等离子体; 其中所述激光器包括:种子激光器(50),用于提供种子激光束(52); 用于从种子激光器接收种子激光束的分束器(54); 用于从分束器接收种子激光束并进行光放大的光放大器(58) 位于所述光放大器下游的第一反射器(60),被配置为将所述种子激光束引导通过所述光放大器并且返回到所述分束器; 以及位于所述分束器的更下游的第二反射器(70),被配置为从所述分束器接收所述种子激光束并将所述种子激光束的至少一部分引导回所述分束器。