摘要:
The laser device has a plurality of parallel index-waveguides. The intermediate regions of the waveguides are at an angle of inclination from a line perpendicular to each of both facets of the laser device. The ends of the waveguides are oriented orthogonally to the facets of the laser device.
摘要:
A semiconductor laser array device comprising a structure for minimizing the dependence of the longitudinal mode of laser oscillation upon the driving electric current, thereby facilitating laser light oscillation at a high output power with a zero degrees phase shift between adjacent lasing elements.
摘要:
A semiconductor laser array device comprising a plurality of index-guided lasing filaments formed in an active layer in a parallel manner, and an electrical current injection portion formed on the upper face of grown layers therefor the flat shape of the electrical current injection portion is asymmetrical with respect to any line which is parallel to the lasing filaments.
摘要:
A semiconductor laser array includes a p-GaAs substrate, a p-Ga.sub.1-x Al.sub.x As cladding layer, a Ga.sub.1-y Al.sub.y As active layer, an n-Ga.sub.1-z Al.sub.z As optical guide layer, an n-Ga.sub.1-x Al.sub.x As cladding layer and an n-GaAs cap layer formed by the liquid phase epitaxial growth method. A plurality of stripe shaped grooves are formed in the surface of the n-GaAs cap layer so that the bottom of the groove reaches the intermediate of the n-Ga.sub.1-z Al.sub.z As optical guide layer. A Ga.sub.1-b Al.sub.b As high resistance layer is filled in the plurality of stripe shaped grooves so that injecting current is divided into a plurality of paths, and each laser emitting region is optically, phase coupled to each other with a phase difference of zero degree.
摘要:
A semiconductor laser array which includes a plurality of active wave guide in a substantially parallel manner disposed on first and second laser opposing laser facets so as to be optically coupled and so that adjacent wave guides converse into one or more active wave guides on an opposing laser facet. The laser array exhibits stable operations and a high output power in a single narrow beam. The active wave guides have identical vertical modes and a phase difference of zero degrees.
摘要:
A semiconductor laser array device comprising a substrate with a plurality of grooves and an active layer disposed over the substrate, resulting in optical waveguides within the active layer corresponding to the grooves, wherein the grooves are disposed over the entire area of the substrate and a means for preventing the injection of current into some of the grooves that are positioned outside of the central area of the substrate is disposed whereby the other grooves positioned in the central area of the substrate consitute a laser array portion of the semiconductor laser array device.
摘要:
A semiconductor laser array device with a waveguide structure comprising waveguides designed such that the widths thereof gradually increase from the center waveguide to the waveguides positioned at both sides of the array portions.
摘要:
A semiconductor laser array device comprising a substrate; an index-waveguiding area positioned on said substrate; a Fourier-converting area, which is adjacent to said waveguiding area and in which laser lights emitted with synchronized phases from said waveguiding area undergo the Fourier-conversion, positioned on said substrate; and a reflecting mirror, which is adjacent to said Fourier-converting area and by which said converted laser lights with a 0.degree.-phase shift mode are selectively reflected so as to be incident upon said waveguiding areas.
摘要:
A semiconductor laser array device comprising an optical waveguide which is in a single mode or a multiple mode in the center portion thereof and is in a branching mode at each of both end portions thereof to form a plurality of branching waveguides which are positioned symmetrically with respect to the waveguiding direction of the laser beams and which are parallel to each other near the facets, thereby oscillating laser beams with a 0.degree.-phase shift therebetween.
摘要:
A process for the production of semiconductor devices includes: (1) forming a thin semiconductor film containing no aluminum on a first semiconductor layer containing aluminum that is disposed on a substrate one or more (2) forming channels on said thin semiconductor film in such a manner that the channel or channels reach or go through said first semiconductor layer to expose a portion of said substrate, resulting in a channelled substrate for succeeding crystal growth thereon, and (3) producing by epitaxial growth crystalline layers on said channelled substrate by the use of a crystal growth solution having a supersaturation which is high enough to prevent said first semiconductor layer from undergoing meltback.