SBIR Phase II: A New Laser Crystal for Holographic Interferometry

这个第二阶段的小企业创新研究项目旨在创建一个（镨钇氟化锂（Pr：YLF）激光器的特性，使实验板扩展脉冲分离全息干涉测量（E.P.S.H.I.）原型摄像机已启动激光器的特性可以是每秒10个脉冲，每脉冲100毫焦耳，相干长度为30厘米到数米。还将对适当的试验物体进行实验室试验，以进一步确定大型结构成功进行干涉测量试验所需的激励和脉冲间隔。一种新的方法泵浦Pr：YLF也将开发和评估。该项目的第一阶段证明Pr：YLF具有独特的脉冲激光全息能力。 E.P.S.H.I相机可用于桥梁、核电站部件储罐和海上石油平台的无损检测领域的重要工业应用。

This Phase II Small Business Innovation Research project aims to create a (Praseodymium Yttrium Lithium Flouride (Pr:YLF) laser with the characteristics that make a breadboard extended pulse separation holographic interferometry (E.P.S.H.I.) prototype camera field operational. The characteristics of the laser could be 10 pulses per second, 100 millijoules per pulse, and a coherence length of 30 cm to many meters. Laboratory testing on suitable test objects will also be undertaken to further characterize the excitation and pulse separation requirements for successful interferometric testing of large structures. A novel method for pumping Pr:YLF will also be developed and evaluated. Phase I of this project proved that Pr:YLF has unique capabilities for pulsed laser holography. Significant industrial applications in the area of nondestructive testing of bridges, nuclear power plant components storage tanks, and off-shore oil platforms can become possible with an E.P.S.H.I camera.