Semiconductor laser optical integrated semiconductor device

Details Semiconductor laser optical integrated semiconductor device Semiconductor laser optical integrated semiconductor device

2009-01-30

2010-12-14

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S050120, C372S046010, C372S038010, C372S096000

Reexamination Certificate

active

07852897

ABSTRACT:
A semiconductor laser is a distributed feedback semiconductor laser in which the lasing wavelength can be changed, and includes a semiconductor substrate and a semiconductor layer portion provided on the substrate and including first and second active layers and an intermediate layer that optically couples the first active layer and the second active layer. The first active layer, the intermediate layer, and the second active layer are arranged in that order in a predetermined axis direction. The semiconductor laser further includes a diffraction grating that is optically coupled with the first and second active layers of the semiconductor layer portion, a first electrode and a second electrode for injecting carriers into the first active layer and the second active layer, respectively, and a third electrode for supplying the intermediate layer with a current. The grating extends in the predetermined axis direction and has a period that is uniform in the predetermined axis direction.

REFERENCES:
patent: 5642371 (1997-06-01), Tohyama et al.
patent: 6108362 (2000-08-01), Adams et al.
patent: 2004/0119079 (2004-06-01), Hayakawa et al.
patent: 2006/0050752 (2006-03-01), Nunoya et al.
“Wavelength Tunable DFB LD with High Coupling Coefficient Gratings”, written by Nobuhiro Nunoya et al., The collected papers of The Institute of Electronics, Information and Communication Engineers (IEICE) General Conference, C 420, p. 282, 2007 and English translations.
“Wavelength Tunable DFB LD with High Coupling Coefficient Gratings”, written by Nobuhiro Nunoya et al., The collected papers of The Institute of Electronics, Information and Communication Engineers (IEICE) General Conference, C 420, p. 282, 2007, Mar. 20, 2007and English translations.

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