Semiconductor optical device utilizing nonlinear optical effect

Details Semiconductor optical device utilizing nonlinear optical effect Semiconductor optical device utilizing nonlinear optical effect

1995-05-15

1996-09-17

Bovernick, Rodney B.

Optical waveguides

Having nonlinear property

385 5, 372 45, 372 50, G02B 610

Patent

active

055577008

ABSTRACT:
A semiconductor optical device having an optical waveguide which represents nonlinear refractive index change due to control light absorption. The waveguide has a bandgap wavelength that increases from its entrance to its exit. In the case of the waveguide divided into first to n-th regions, the bandgap wavelengths .lambda..sub.1, .lambda..sub.2, . . . , .lambda..sub.n-1, .lambda..sub.n of the regions satisfy the relationship .lambda..sub.1 <.lambda..sub.2 < . . . <.lambda..sub.n-1 <.lambda..sub.n. In the case of the waveguide not divided into regions, the bandgap wavelength .lambda. of the waveguide monotonously increases from the entrance to the exit. This device can operate by the control light having a lower energy than the conventional one.

REFERENCES:
patent: 4961198 (1990-10-01), Ishino et al.
patent: 5121182 (1992-06-01), Kuroda et al.
patent: 5191630 (1993-03-01), Tajima
patent: 5450437 (1995-09-01), Shim et al.

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