TOKYO -- Yokogawa Electric Corporation and Fujitsu Limited today announced the joint development of the world's first practical 40 Gbps optical transmission technologies using differential quadrature phase shift keying (DQPSK)[1]. The two companies are respectively planning to incorporate the technologies in various new products for 40 Gbps ultra high-speed optical transmission networks.

The new technologies were developed under the strategic partnership established between Yokogawa and Fujitsu in March of 2006 to jointly develop core system technologies and key components for ultra high-speed optical transmission systems, and with the cooperation of Fujitsu Laboratories Ltd. Sample products were on display at the Optical Fiber Communication Conference and Exposition (OFC) and the National Fiber Optic Engineers Conference (NFOEC) 2007, held in Anaheim, California from March 27 - 29, 2007.

Yokogawa Electric Corp.

Fujitsu Ltd. (Tokyo: 6702; London: FUJ; OTC: FJTSY)