Compact and inexpensive iodine-stabilized diode laser system with an output at 531 nm for gauge block interferometers |
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| Affiliation: | 1. National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan;2. Department of Physics, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-Ku, Yokohama 240-8501, Japan;1. National Metrology Institute of Japan, National Institute of Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan;2. The Graduate School for the Creation of New Photonics Industries, Hamamatsu, Shizuoka 431-1202, Japan;3. Graduate School of Mechanical Engineering, Pusan National University 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, Repubilc of Korea;1. Université Grenoble 1/CNRS, UMR5588 LIPhy, Grenoble F-38041, France;2. Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China;3. Laboratory of Theoretical Spectroscopy, V.E. Zuev Institute of Atmospheric Optics, SB, Russian Academy of Science, 1, Akademician Zuev Square, 634021 Tomsk, Russia |
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| Abstract: | A compact and inexpensive iodine-stabilized diode laser system with an output at 531 nm has been applied to long gauge block measurements. Although the optical frequency of the output beam was widely modulated (modulation width of ～22 MHz), the coherence length and interference phase stability are sufficiently long and high, respectively, for the interferometric measurement of long gauge blocks of up to 1000 mm in length. The effective uncertainty of laser frequency in the interferometric measurement was theoretically and experimentally confirmed to be less than 10?9. |
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| Keywords: | Stabilized laser Optical frequency Gauge block Interferometry |
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