Search | Korea Science

김동일;정세모
- Journal of the Korean Institute of Telematics and Electronics
- /
- v.24 no.6
- /
- pp.1025-1033
- /
- 1987
This paper describes the development of a new type of an integrated optical adjustable attenuator using magneto-optic effects in 4-layer slab waveguide. The characteristics of the proposed structure are analyzed and evaluated. Furthermore, the fabrication method and attenuation characteristics have been tested by experimets, therby confirming qualitatively the validity of the design theory.
PDF

이상효;김은수
- The Journal of Korean Institute of Communications and Information Sciences
- /
- v.8 no.4
- /
- pp.139-144
- /
- 1983
In this paper, the ploarization and Faraday rotation properties of the single mode optical fiber have been investigated for magnto-optic current transformer application. On the analysis, the optical fiber is modeled as a linear retarder and the intrinsic birefreingence of the optical fiber is approximately found to be 2.57'/m from the measurement, and the bend-induced birefringence is proportional to the inverse square of bending radius. The polarization rotation sensitivity is foung to be F/H=1.4x$10^-5$rad/[A/m] from the analysis of Faraday rotation of single mode optical fiber.
PDF

Nahm, T.U.;Oh, S.J.
- Journal of the Korean Vacuum Society
- /
- v.12 no.S1
- /
- pp.17-20
- /
- 2003
We have studied magnetic and structural properties of ultrathin Ni films grown on PI(lII) surface using in situ surface magneto-optic Kerr effect and X-ray photoelectron spectroscopy. Perpendicular magnetic anisotropy was absent, and longitudinal Kerr signal was only detectable for Ni films thicker than 6 monolayers. Enhancement in longitudinal Kerr signal by 30% was achieved by post-annealing at temperatures below 800K, but upon annealing at 820K, surface alloy was formed. By using core-level binding-energy shifts, the composition was determined to be Ni 70 at. %.
PDF KSCI