'A' cited 'B'.



'A'

N. Moon, F. Kubota, C. Goh, and K. Kikuchi, "A simple-structured independently bidirectional 2x2 optical cross-connect for single fiber bi-directional ring networks," Proc. Optical Fiber Communications (OFC 2003), Atlanta, Georgia, USA, Mar. 2003, pp. 350-351.

Addresses: Communications Research Laboratory, Tokyo, Japan

The University of Tokyo, Rokyo, Japan



'B'

J. Kim and B. Lee, "Bidirectional wavelength add-drop multiplexer using multiport optical circulators and fiber bragg gratings," IEEE Photonics Technology Letters, vol. 12, no. 5, pp. 561-563, 2000.