Title :
Characterization of a 16-channel optical/electronic selector for fast packet-switched WDMA networks
Author :
Tong, F. ; Li, C.-S. ; Stevens, A.E. ; Kwark, Y.H.
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
Abstract :
We report the demonstration of a 16-channel optical/electronic selector for applications in fast packet-switched wavelength division multi-access networks. The selector chip has four differential transimpedance amplifiers with each amplifier shared by four photodetectors, giving a total of 16 channels selected by two stages of MESFET switches. The channel switching time is approximately 10 ns. No appreciable crosstalk is observed from neighboring channels in the first-stage switches, and a 0.35 dB crosstalk penalty is measured through the second-stage switches at a BER of 10/sup -9/ with -20 dBm average optical power in the interference channel. The selector can also be reconfigured as an unswitched four-channel array receiver.<>
Keywords :
crosstalk; differential amplifiers; field effect integrated circuits; integrated optoelectronics; multiplexing equipment; optical receivers; optical switches; packet switching; photodetectors; semiconductor switches; wavelength division multiplexing; 10 ns; 16-channel optical/electronic selector; MESFET switches; amplifier; average optical power; channel switching time; crosstalk; differential transimpedance amplifiers; fast packet-switched WDMA networks; fast packet-switched wavelength division multi-access networks; first-stage switches; interference channel; neighboring channels; photodetectors; second-stage switches; selector chip; unswitched four-channel array receiver; Differential amplifiers; MESFETs; Optical amplifiers; Optical crosstalk; Optical fiber networks; Optical packet switching; Optical receivers; Optical switches; Photodetectors; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
