Semiconductor integrated device

Details Semiconductor integrated device Semiconductor integrated device

2011-01-18

2011-01-18

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular beam control device

Tuning

C372S050100, C372S050110, C372S050120, C372S050121

Reexamination Certificate

active

07873082

ABSTRACT:
A semiconductor integrated device includes a plurality of wavelength tunable lasers, provided on a semiconductor substrate, and having oscillation wavelength ranges different from each other. Each of the wavelength tunable lasers includes an optical waveguide including, alternately in an optical axis direction, a gain waveguide portion and a wavelength controlling waveguide portion, and a diffraction grating provided over both the gain waveguide portion and the wavelength controlling waveguide portion. A value obtained by dividing a width of the wavelength controlling waveguide portion by a width of the gain waveguide portion in one of the plurality of wavelength tunable lasers is larger than a value obtained by dividing a width of the wavelength controlling waveguide portion by a width of the gain waveguide portion in a different one of the wavelength tunable lasers, which oscillates on a shorter wavelength side with respect to an oscillation wavelength range of the one wavelength tunable laser.

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International Search Report of PCT/JP2007/054330, date of mailing May 1, 2007.

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