Optical heterodyne carrier generation using stimulated Brillouin scattering in birefringent optical fibre

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Abstract
An optical technique for producing a heterodyne carrier frequency suitable for electronic signal processing schemes in sensing applications is described. The technique exploits stimulated Brillouin scattering generated in birefingent optical fibre. A single fibre system is reported which produces a 10.6 MHz output carrier signal, modulated by optical chaos induced instabilities. The implications of the results for future signal processing and sensing schemes based on stimulated Brillouin scattering are then discussed.