ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
권호 표지

An All-Optical Gain-Controlled Amplifier for Bidirectional Transmission

  • Choi, Bo-Hun (Division of Optical Communications and Electronic Engineering, College of Engineering, Gwangju University) ;
  • Hong, Kyung-Jin (Division of Optical Communications and Electronic Engineering, College of Engineering, Gwangju University) ;
  • Kim, Chang-Bong (Division of Information and Communication Engineering, Kongju National University) ;
  • Won, Yong-Hyub (School of Engineering, Information and Communications University)
  • Received : 2005.05.25
  • Published : 2006.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

A novel all-optical gain-controlled (AOGC) bidirectional amplifier is proposed and demonstrated in a compact structure. The AOGC function using fiber Bragg grating (FBG) pairs controls both directional signals independently, and combinations of optical interleavers and isolators suppress Rayleigh backscattering (RB) noise. The amplifier achieves high and constant gain with a wide dynamic input signal range and low noise figure. The performance does not depend on the input signal conditions, whether static-state or transient signals, or whether there is symmetric or asymmetric data traffic on bidirectional transmission. Transmission comparison experiments between invariable symmetrical and random variable asymmetric bidirectional data traffic verify that the all-optical gain control and bidirectional amplification functions are successfully combined into this proposed amplifier.

Keywords