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4*4 directional coupler switch matrix with an InGaAlAs/InAlAs multiquantum well structure

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4 Author(s)
Takeuchi, H. ; NTT Optoelectron. Labs., Kanagawa, Japan ; Hasumi, Y. ; Kondo, S. ; Noguchi, Y.

A 4*4 directional coupler switch matrix is developed which uses, for the first time, the quantum confined Stark effect of InGaAlAs/InAlAs multiquantum well structures. The rearrangeable nonblocking 4*4 network with six 2*2 switches is shown to be perfectly functional with switching voltages between 5 and 6 V and crosstalk below -17 dB in all the operation states.

Published in:

Electronics Letters  (Volume:29 ,  Issue: 6 )