短脉冲激光

• We have studied the propagating properties of ultrashort pulses in the clbo crystal , analyzed theoretically and simulated numerically the optical parametric properties of interaction between ultrashort pulses and the clbo crystal
  论文完成了超短脉冲激光在clbo晶体中传播特性的分析，并对clbo晶体的超短脉冲参量特性进行了理论分析和数值模拟。
• As we known that the laser pulse energy will be attenuated in the turbid media and the pulse shape will be changed by scattering and absorption . besides , the ultra short laser pulse will be widened by the diffusive scattering
  由于超短脉冲激光在混浊介质中传输时，将因漫散射而使脉冲展宽，因此漫反射、漫透射光中必然含有介质光学特征的信息。
• The conditions for long distance propagation and self - guiding are given . 3 . an optical amplification system for 10 ps krf laser with polarization multiplexing is developed and the energy of 140 ml is extracted
  发展了一种适用于超短脉冲激光的光学偏振放大技术，并应用于10pskrf激光放大系统中，可在有限的激光输出口径内有效地提取激光的输出能量。
• Intralase uses extremely short pulses of laser to create thousands of small bubbles , all at the same depth inside the cornea . the net effect is a flap cut , but without any of the complications associated with a microkeratome
  Intralase激光利用极短脉冲激光来制造成千上万的小气泡，全数在同一深度之内存于角膜中，这样，其实质效果是切割成瓣，而并没有使用角膜刨刀所可能引致的并发症。
• So far the researches on ultrashortpulse laser - matter interaction concentrated on infrared regime , yet ultraviolet laser has the advantage in intense field physics and icf researches for its short wavelength and less nonlinear effects
  迄今为止，超短脉冲激光及其与物质相互作用的研究大都集中于红外光谱范围，而紫外准分子短脉冲激光系统由于其波长短、非线性效应小而具有良好的聚焦性能。
• Using this system will increase the efficiency when excimer laser amplifies ultra - short laser pulse without using any complex multiangular optics system . it is possibly to be a new way to gain high energy , high power , high quality , high efficiency ultra - short uv laser
  如果成功，将能充分发挥准分子激光的优点，为产生高功率，高束质的短脉冲激光提供一条简单、高效率的技术路线和途径。
• But the life time of krf laser medium is only 2 ns while the pump time of e - beam pump krf laser is over 100 ns . when a 1 ps ultrashort pulse amplified by krf laser amplifier most pump energy is waste . technology of multi pulse amplify can solve this problem
  Krf激光器的工作介质是非储能介质，上能态有效寿命约为2 - 3ns ，而电子束的泵浦时间一般为上百ns ，放大超短脉冲激光时绝大部分上能态的储能没有被利用。
• And the pulse duration was compressed from 420 to 220fs by compensated gvd broadening with prism pairs , the intensity achieved on target reached 1017w / cm2 . furthermore , the 50mj uv pulse was boosted to 2 - 3j by e - beam pumped amplifier , the laser power reached as high to 2tw
  并采用“天光一号”电子束泵浦krf激光器进行紫外超短脉冲激光的进一步放大，获得能量2 3j 、脉冲宽度约1 . 2ps的紫外超短脉冲激光输出，激光功率达到2tw 。
• The laser beam spot evolution and electron density in the guiding range are evaluated with the burn pattern and the measured conductivity . the above results will be useful in ultrashort laser pulse amplification and future research in ultrashort intense laser propagation in plasmas and ionizing gases
  以上研究结果对于超短脉冲激光放大技术研究以及超短超强脉冲激光在低密度等离子体和空气中长距离传输和聚焦研究等具有重要的实用参考价值。
• Presently , the laser pulse from the high power ultrashort laser system is several femtoseconds in duration , tw ( or pw ) level in peak power , 1020 w / cm2 ( or 1021 w / cm2 ) in focusing power density , according electric field is much stronger than coulomb field in atoms
  目前，高功率超短脉冲激光放大系统输出的激光，脉宽达到几个飞秒，峰值功率达到太瓦甚至拍瓦量级，聚焦功率密度达10 ~ 20w cm ~ 2 ，甚至1021w cm2 ，相应的电场比原子内库仑场强得多。