Browse > Article

Reducing the Effects of Optical Noise in an Optical Wireless System Using a Fiber Coupler  

Lee Seong-Ho (Department of Electronic & Information Engineering, Seoul National University of Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.5, 2005 , pp. 494-500 More about this Journal
Abstract
In this paper, optical noise is reduced by a differential detector with an optical fiber coupler in an optical wireless system. An $1\times2$ optical fiber coupler divides the received optical signal by 2 equally, and connects them to the two photodiodes in a differential detector. The output voltage variation due to the abrupt change of optical noise distribution in space disappears because the two photodiodes effectively detect the optical signal at the same point. The signal to noise ratio in a differential detector with a fiber coupler was 8 dB higher than in a single photodiode with an optical filter.
Keywords
Optical Fiber Coupler; Optical Noise; Optical Wireless System Differential Detector;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M. Street, P. N. Stavririnou, D. C. O'Brien, and D. J. Edwards, 'Indoor optical wireless systems-a review', Optical and Quantum Electronics, vol. 29, pp. 349-378, 1997   DOI   ScienceOn
2 이성호, '무선광연결에서 편광판을 이용한 광잡음 감소', 한국전자파학회논문지, 11(3), pp. 365371, 2000년 4월
3 Joseph M. Kahn, John R. Barry, 'Wireless infrared communications', Proc. IEEE, vol. 85, no. 2, pp. 265-298, 1997
4 이성호, '빔분할기를 이용한 무선광 차등검출기', 한국전자파학회논문지, 15(1), pp. 96-102, 2004년 1월
5 Seong-Ho Lee, 'Reducing the effects of ambient noise light in an indoor optical wireless system using polarizers', Microwave and Optical Technology Letters, vol. 40, no. 3, pp. 228-231, Feb. 2004   DOI   ScienceOn
6 이성호, '무선광 차동검출기에서 디지털가변저항을 이용한 잡음광의 감소', 한국전자파학회논문지, 13(6), pp. 599-604, 2002년 7월