Optical power limiter

Details Optical power limiter Optical power limiter

1992-08-27

1994-01-25

Ullah, Akm E.

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

G02B 630

Patent

active

RE0345202

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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