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Picosecond all-optical polarization switching in InGaAsP MQW's at 1.52 μm

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4 Author(s)
Hyland, J.T. ; Dept. of Phys. & Astron., St. Andrews Univ., UK ; Kennedy, G.T. ; Miller, A. ; Button, C.C.

An all-optical switch operating at a wavelength of 1.52 μm is demonstrated. The switch makes use of electron spin polarization in a multiple-quantum-well semiconductor structure. The polarization change of a signal beam was observed to recover with a time constant of 20 ps determined by the spin relaxation time.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 10 )