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A scheme for recording a fast process at nanosecond scale by using digital holographic interferometry with continuous wave laser
Affiliation:1. School of Information Science and Engineering, Northeastern University, Shenyang 110004, China;2. Software College, Northeastern University, Shenyang 110004, China;1. Gandhi Institute for Technological Advancement (GITA), Bhubaneswar, India;2. School of Computer Science & Engineering, Faculty of Engineering, SMVD University, Kakryal, Katra, 182320, J&K, India;3. Post Graduate Department of Physics, Berhampur University, Odisha, India;4. Material Science Research Laboratory, Department of Physics, S.V. College, Aligarh, 202001, U.P., India;1. School of Opto-Electronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;2. School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China;1. Department of Electro-optical and Energy Engineering, Ming Dao University, Changhua 52345, Taiwan, ROC;2. School of Defense Science, National Defense University, Tashi, Taoyuan 33509, Taiwan, ROC;3. Department of Applied Chemistry & Material Science, National Defense University, Taiwan, ROC;4. Department of Material Science and Engineering, Ming Dao University, Changhua 52345, Taiwan, ROC;1. Faculty of Science, Engineering, Jiangsu University, Zhenjiang, 212013, China;2. School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China
Abstract:A scheme for recording fast process at nanosecond scale by using digital holographic interferometry with continuous wave (CW) laser is described and demonstrated experimentally, which employs delayed-time fibers and angular multiplexing technique and can realize the variable temporal resolution at nanosecond scale and different measured depths of object field at certain temporal resolution. The actual delay-time is controlled by two delayed-time fibers with different lengths. The object field information in two different states can be simultaneously recorded in a composite hologram. This scheme is also suitable for recording fast process at picosecond scale, by using an electro-optic modulator.
Keywords:Digital holographic interferometry  Fast process at nanosecond  Acousto-optical modulator  Angular multiplexing technique
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