Electronics and Telecommunications Research Institute

Sung Un Lee

Jong Hyun Lee

Hee Sang Chung

Kwang Joon Kim

Ji Wook Youn

Joon Hak Bang

Sang Rok Lee

Wan Seok Seo

Byeong Ho Yoon

An optical packet header processing apparatus for processing a header of an optical packet expressing an address of a destination node to control a switching operation of an optical packet switch. The optical packet header processing apparatus comprises a beam splitter for splitting the optical packet header into a predetermined number of optical packet header elements, and a plurality of time interval detectors. Each of the time interval detectors receives a corresponding one of the optical packet header elements from the beam splitter and outputs a detect optical pulse if a pair of optical pulses having a predetermined time interval therebetween are present in the received optical packet header element. A plurality of optical pulse detectors are adapted to convert the detect optical pulses from the time interval detectors into electrical signals and transfer the converted electrical signals to the optical packet switch, respectively. Therefore, the optical packet switch determines the destination node in response to the electrical signals from the optical pulse detectors and outputs the optical packet to an output port corresponding to the determined destination node.

Optical packet header processing apparatus for optical packet switch

An optical gate based optical space division switch for switching optical signals inputted through arbitrary input ports to a desired output port with no internal collision. The optical space division switch comprises a first splitting section for splitting the optical signals inputted through the input ports, a first amplification section for selectively amplifying output optical signals from the first splitting section, a second splitting section for splitting output optical signals from the first amplification section, a second amplification section for selectively amplifying output optical signals from the second splitting section, a coupling section for coupling output optical signals from the second amplification section, and a third amplification section for amplifying an output optical signal from the coupling section and transferring the amplified optical signal to the output port. According to the present invention, optical gates are connected in a two-stage manner to cross-couple optical signals. Therefore, the optical signals are transferred only to a desired output port, thereby reducing the number of their crosstalk components and so significantly improving a signal-to-noise ratio.

Optical gate based optical space division switch

Growing community of inventors

Taejon, South Korea

Sung Un Lee