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

J T Hyland, G T Kennedy, A Miller, C C Button

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Abstract

An all-optical switch operating at a wavelength of 1.52 mu m 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.

Original languageEnglish
Pages (from-to)1419-1421
Number of pages3
JournalIEEE Photonics Technology Letters
Volume10
Issue number10
DOIs
Publication statusPublished - Oct 1998

Keywords

  • excitons
  • optical communications
  • optical switches
  • quantum wells
  • ultrafast optics
  • QUANTUM-WELL ETALON
  • GATE
  • RELAXATION
  • ROTATION

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