Optical transistor action by nonlinear coupling of stimulated emission and coherent scattering

D. L. Andrews, D.S. Bradshaw

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)
3 Downloads (Pure)

Abstract

In the pursuit of improved platforms for computing, communications and internet connectivity, all-optical systems offer excellent prospects for a speed and fidelity of data transmission that will greatly surpass conventional electronics, alongside the anticipated benefits of reduced energy loss. With a diverse range of sources and fiber optical connections already in production, much current effort is being devoted towards forging optical components for signal switching, such as an all-optical transistor. Achievement of the desired characteristics for any practicable device can be expected to depend crucially on the engagement of a strongly nonlinear optical response. The innovative scheme proposed in the present work is based upon a third-order nonlinearity - its effect enhanced by stimulated emission - operating within a system designed to exploit the highly nonlinear response observed at the threshold for laser emission. Here, stimulated emission is strongly driven by coupling to the coherent scattering of a signal input beam whose optical frequency is purposely off-set from resonance. An electrodynamical analysis of the all-optical coupling process shows that the signal beam can significantly modify the kinetics of emission, and so lead to a dramatically enhanced output of resonant radiation. The underlying nonlinear optical mechanism is analyzed, model calculations are performed for realizable three-level laser systems, and the results exhibited graphically. The advantages of implementing this all-optical transistor scheme, compared to several previously envisaged proposals, are then outlined.
Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Number of pages7
Volume7797
DOIs
Publication statusPublished - 1 Jan 2010

Keywords

  • Scattering
  • Lasers
  • Nonlinear response
  • Optical components
  • Radiation
  • Data transmission
  • Electronics
  • Internet

Cite this