Nonlinear optical element
OwnerMasashi Usami, Hideaki Tanaka +3inventors
InventorsMasashi Usami, Hideaki Tanaka, Kosuke Nishimura, Munefumi Tsurusawa, Haruhisa Sakata
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Abstract
A nonlinear optical element is disclosed for reducing intensity noise of both mark level and space level, and being stable, miniaturized and low-priced. Signal light enters a semiconductor waveguide layer (14). The semiconductor waveguide layer (14) has a band gap wavelength shorter than a wavelength of the signal light. A diffraction grating (12), having a Bragg wavelength close to the wavelength of the signal light, is disposed adjacent to the semiconductor waveguide layer (14). DC voltage is applied to the semiconductor waveguide layer (14).
Claims5
A nonlinear optical element comprising:
- a semiconductor waveguide layer having a band gap wavelength shorter than a wavelength of signal light to guide the signal light;
- a diffraction grating to affect the signal light propagating on the semiconductor waveguide layer, a reflection wavelength of the diffraction grating shifting according to the optical intensity of the signal light;
- and
- an electric field applicator to apply an electric field to the semiconductor waveguide layer.
Dependencies are inferred from the claim text.