Electronics and Telecommunications Research Institute

Jong-Dug Shin

El-Hang Lee

Min-Yong Jeon

Cheul-Shin Kang

A bidirectional multi-channel all-optical ring network is provided, this network comprising a number of nodes linked by optical cables, each of the node comprising two of WDM/WDDM, packet switching devices, and a node controller, in which network a first optical signal group of wavelength channel signals (for example, .lambda.1, .lambda.3, .lambda.5, . . . ) are transferred in a counter-clockwise direction, and a second optical signal group of wavelength channel signals (for example, .lambda.2, .lambda.4, .lambda.6, . . .) are transferred in a clockwise direction, thereby allowing an optical data signal to be transmitted through the channel of shorter distance.

Bidirectional multi-channel optical ring network using WDM techniques

A fiber-optic address detector comprises fiber-optic delay lines on one surface of which a metal thin film is evaporated, the fiber-optic delay lines being connected in a melting state to fiber-optic couplers, wherein inputting address photonic signals are tapped by the inputting fiber-optic couplers, reflected by the metal thin films at the end portion of the fiber-optic delay line and then re-combined by the inputting fiber-optic coupler, whereby it can reduce the number of the fiber-optic coupler used in the conventional fiber-optic address detector to one half as well as obtain the same address detection effect.

Growing community of inventors

Daejeon, South Korea

Jong-Dug Shin