Design of the Large Diameter Faraday Rotator for High-power Laser Systems

고출력 레이저 시스템을 위한 대구경 Faraday Rotator 제작

  • Published : 2008.06.01

Abstract

We report on the design and experimental results of a large diameter faraday rotator for the high-power laser system(KLF: Kaeri laser facility) that was completed in late 2007s at Korea Atomic Energy Research Institute. The design involves modelling the magnetic field of cylindrical coil with large diameter(110 mm). Magnetic field generation coil is designed by 6 layers using a rectangular wire with cross-sectional area $3{\times}5[mm^2]$. We obtain an isolation ratio for optical feedback of 35 dB at 1064 nm and magnetic field strengths ${\sim}25kG$. We expect that the design can be widely used optical isolators in high-power laser system.

Keywords

References

  1. N. George and R. W. Waniek, "Faraday rotators for high power laser cavities", Appl. Opt. 5, 1183-1185, 1966 https://doi.org/10.1364/AO.5.001183
  2. M. A. Rhodes, B. Woods, J. J. DeYoreo, D. Roberts, and L. J. Atherton, "Performance of large-aperture optical switches for high-energy ICF lasers," Appl. Opt., vol. 34, 5313-5330, 1995
  3. J. Goldhar and M. A. Henesian, "Electro-optical switches with plasma electrodes," Opt. Lett., vol. 9, 73-75, 1984 https://doi.org/10.1364/OL.9.000073
  4. S. K. Hong, C. H. Lim et al., "Simulation of High-Energy Laser Amplifier System", Advanced Lasers and Their Applications, 161-162, 2006
  5. S. K. Hong, C. H. Lim et al., "Improved Spatial Filter and Serrated Aperture for High-Energy Pulsed Lasers", Transactions of the Korean Nuclear Society Spring Meeting, P07A12, 2006
  6. C. H. Lim, S. K. Hong et al., "Status of 1 kJ Nd:Glass Laser Facility at KAERI for the Basic Research related to Quantum Engineering", ICUIL 16H00 - 17H30p, 2006
  7. C. H. Lim, S. K. Hong et al.,, "Prospects and progress of the 1 kJ Nd:Glass laser Facility at KAERI", The 7th Pacific Rim Conference on Lasers and Electro-Optics, 69-70, 2007
  8. C. H. Lim, S. K. Hong et al., "Construction of the 1 kJ Nd:Glass Laser Facility at KAERI", IFSA, 144p, 2007
  9. P. E. Coyle, ed. "Laser Program Annual Report 1976", Lawrence Livermore National Laboratory, Livermore, Calif. UCRL-50021-76, 2_274 - 2_276p, 1977
  10. H. G. Lee, Y. H. Won, and G. S. Lee, "Faraday rotation of Hoya FR5 glass at cryogenic temperature", Appl. Phys. Lett. 68, 3072-3074, 1996 https://doi.org/10.1063/1.116426