Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2007-07-24
2007-07-24
Nguyen, Dung (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S044011
Reexamination Certificate
active
10702604
ABSTRACT:
This semiconductor laser device has the same structure as the conventional broad-area type semiconductor laser device, except that both side regions of light emission areas of active and clad layers are two-dimensional-photonic-crystallized. The two-dimensional photonic crystal formed on both side regions of the light emission area is the crystal having the property that 780 nm laser light cannot be wave-guided in a resonator direction parallel to a striped ridge within the region. The light traveling in the direction can exist only in the light emission area sandwiched between two photonic crystal regions, which results in the light laterally confined by the photonic crystal region. The optical confinement of the region suppresses the loss in the light at both edges of the stripe serving as the boundary of the optical confinement, which reduces the curve of wave surface and uniforms the light intensity distributions of NFP and FFP.
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Asatsuma Tsunenori
Hirata Shoji
Kananen Ronald P.
Nguyen Dung
Rader & Fishman & Grauer, PLLC
Sony Corporation
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