Optical power limiter

Details Optical power limiter Optical power limiter

G - Physics

02

F

88/97.7

G02F 1/35 (2006.01) G02F 1/365 (2006.01)

Patent

CA 1321500

ABSTRACT An optical power limiter structure comprises an asymmetric waveguide showing a defocussing nonlinearity of the core region material. The structure comprises a cladding region layer 2 and a core region layer 3 grown on a substrate 1. The core region layer 3 upper surface is exposed to air. By using an optical signal of wavelength .lambda. slightly greater than the bandgap equivalent wavelength of the core region material, the structure exploits a defocussing nonlinearity of semiconductor materials in a manner enhanced by the asymmetry of the waveguide.

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