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NTT optical communications IC switches at 100Gbps

Posted: 09 Dec 2002 ?? ?Print Version ?Bookmark and Share

Keywords:nippon telegraph and telephone? ntt? optical communication ic? multiplexer ic? demultiplexer ic?

Nippon Telegraph and Telephone (NTT) Corp. has announced that they have developed an optical communication IC that switches at 100Gbps. They have also achieved time division multiplexing and demultiplexing using the IC, achieving a rate that the company claims to be the fastest logical processing of electronic signals.

Developers used InP semiconductor material on the IC to permit the even integration of High Electron Mobility Transistor circuits with gate lengths of 100nm.

The IC is basically a mux circuit that converts a lower bit-rate parallel signal into a high speed serial signal by time division, and the matching demux that converts the high speed serial signal to the lower bit-rate parallel signal. NTT claims that this will allow the communication speed of network equipment to be raised by a factor of ten.

The company also developed a new structure for the IC that eliminates the need for an output buffer circuit, to further improve the switching speed. In addition, they also adopted peaking technology - which uses resonance to improve the HF characteristics - in the selector core part enhance the bandwidth.

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