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A 117-W 1.66-Times Diffraction Limited Continuous-Wave Nd:YVO_4 Zigzag Slab Laser with Multilayer Amplified-Spontaneous-Emission Absorbing Coatings 下载免费PDF全文
We report a continuous-wave end-pumped Nd:YVη4 zigzag slab laser with multilayer amplified spontaneous emission(ASE) absorbing coatings.The coatings are deposited on the slab faces.A five-layer structure consists of SiO2-Ti-SiO2-Ti-Au,and the thicknesses are 2520 nm,10 nm,160 nm,24 nm and 200 nm,respectively.The designed coatings show good performance for the ASE control in the experimental tests.A stable-unstable hybrid laser oscillator along orthogonal directio... 相似文献
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艺术源于生活,高于生活,是对生活的提炼和概括。在电视节目后期制作中,平面设计占有重要的比重和角色,它贯穿整个包装的过程,艺术的再现更凸显了内容的表达,在二度创作中发挥着非常重要的作用。它使画面更加完美,和内容结合的点更贴切,更好的传达。 相似文献
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We demonstrate a new management of multi-stage optical parametric generator(OPG)and amplifier(OPA)to obtain high-energy picosecond sources with high beam quality.The setup of multi-stage OPG-OPA requires mode-matching between the pump beam and the stable mode of the OPG-OPA.In a proof-of-principle experiment,the single-pass multi-stage OPG-OPA consists of three walk-off compensated KTP crystal pairs and two lenses,pumped by an 86 ps,1064 nm 10 kHz picosecond laser.The signal light at~1.77μm has an average output power of 502 mW with record energy up to 50.2μJ.The beam quality factor of the signal light can be improved toM2x ×M2yafter filtering out about 40%signal power.To the best of our knowledge,it is the first picosecond single-pass multi-stage OPG-OPA pumped at kHz regime. 相似文献
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随着社会的进步以及科技的发展,中国电信、中国网通运营商正朝着NGN方向发展,而中国联通和中国移动则朝着3G发展。广电呢?华三针对此推出了信息媒体网络(IMN),助力广电运营商发展。IMN信息媒体网络分应用层(实现业务管理和运营:多样化)、控制层(实现多业务的精细化控制:集中化)、网络层(实现多业务承载:统一化)和终端层(实现用户的不同业务的接入:标准化),其特点在于:分层思路,便于系统灵活建设; 相似文献
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2010年对于广电而言又将是一个不平凡的一年.在短短的半年内。中国三网融合的步伐迈得是如此地迅速,使得广电系统不得不直面三网融合试点下的业务开展、方案实施等诸多具体问题。 相似文献
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虽然NGB相关标准体系还在制定完善的进程中,但其发展规划却已非常明确:用3年时间建成覆盖全国主要城市的覆盖网,用10年时间建成下一代广播电视网。2009年7月,NGB示范网在万众瞩目中开始在上海启动,随后江苏、湖北、杭州等地区先后宣布将开始进行NGB试点……对于目前正进行大规模IP城域网、用户接入网搭建及改造的有线运营商来说,在相关标;位缺失的情况下,在现期选择什么样的技术和设备,才能在未来实现与NGB的无缝对接,关乎能否成功转型为多业务运营商的发展愿景! 相似文献
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本文介绍了获金帆奖二等奖的大型文献纪录片《平山记忆》包装风格和包装方案,红色寻根之旅的口述实录在包装定位上,力求用简洁的包装,贴入历史年代感的主色调,还原当时的真实资料的前提下,精细加工打磨,让包装成为这部纪录片的一部分,浑然一体,又有独立的包装风格. 相似文献
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A 45-μJ, 10-kHz,burst-mode picosecond optical parametric oscillator synchronously pumped at a second harmonic cavity 下载免费PDF全文
A novel high-energy picosecond optical parametric oscillator (OPO) was realized by placing an OPO in a second-harmonic (SH) cavity. In a proof-of-principle experiment, we demonstrated excellent burst energy of 45 μJ for the OPO signal at 900 nm that operates at a pulse repetition rate of 10 kHz and a pulse width of 46.8 ps. The beam quality was measured as $M^{2}_{x} = 1.44$ and $M^{2}_{y} = 1.40$ in the orthogonal directions, corresponding to an average beam factor $M^{2} = 1.42$. So far, this study is the first to investigate high-energy ps OPO synchronously pumped in a second-harmonic cavity. 相似文献