摘要:
A semiconductor laser device is disclosed which emits laser light from a facet. The semiconductor laser device comprises a multi-layered structure formed on a semiconductor substrate, the multi-layered structure having an AlGaAs active layer for laser oscillation, and a protective film formed on the facet, wherein a film containing sulfur is provided between the facet and the protective film.
摘要:
A V-channeled substrate inner stripe (VSIS) laser is manufactured on a GaAs substrate. The VSIS laser includes p-Ga.sub.0.7 Al.sub.0.3 As active layer, and an n-Ga.sub.0.85 Al.sub.0.15 As cap layer. The GaAs substrate is removed from the final device. The n-Ga.sub.0.85 Al.sub.0.15 As cap layer functions to support the final device, and to minimize a stress applied to the p-Ga.sub.0.7 Al.sub.0.3 As active layer.
摘要:
A window VSIS semiconductor laser includes a stimulated region and window regions formed on both ends of the stimulated region. A V-shaped groove is formed in a substrate, and an active layer is formed on the substrate. In one preferred form, the V-shaped groove has a wider width in the stimulated region as compared with the V-shaped groove formed in the window regions. The active layer is a crescent active layer in the stimulated region. One edge of the V-shaped groove in the stimulated region is continuously aligned on a line to the corresponding edge of the V-shaped groove formed in the window regions so as to enhance the optical coupling. In another preferred form, indents are formed in the substrate in the window regions in a manner to sandwich the V-shaped groove formed in the window regions. The V-shaped groove has the same width in the stimulated region and in the window regions. The active layer is plane shaped in the stimulated region, and a thickness of the active layer in the stimulated region is thicker than the active layer formed in the window regions.
摘要:
A semiconductor laser comprising a substrate having a two step-striped channel; and a double heterostructure-laser-operating area having successively a cladding layer, an active layer and a second cladding layer on the substrate. The two step-striped channels are composed of a first channel and a second channel having a width which is narrower than the width of the first channel and having a depth which is deeper than the depth of the first channel. The second channel is positioned in the center portion of the first channel, thereby allowing current injected into the active layer to flow into the center portion of the two step-striped channel.
摘要:
A semiconductor laser comprising a substrate for crystal growth having a striped channel, an active layer for laser oscillation, a cladding layer containing Mg which is in contact with said active layer at the side of said striped channel substrate.
摘要:
A window V-channeled substrate inner stripe semiconductor laser which includes window regions formed at both ends of a stimulated region. The stimulated region includes a crescent active layer, and each of the window regions includes a plane active layer for transferring the laser beam emitted from the stimulated region to the mirror. The window regions ensure a stable operation of the laser oscillation and a high optical power for catastrophic optical damage.
摘要:
A semiconductor laser comprising a middle-positioned active layer sandwiched between the lower-positioned active layer and the upper-positioned active layer, the refractivity of each of said lower- and upper- positioned active layers being slightly different from that of the middle-positioned active layer.
摘要:
A semiconductor laser device is disclosed which emits laser light from a facet. The semiconductor laser device comprises a multi-layered structure formed on a semiconductor substrate, the multi-layered structure having an AlGaAs active layer for laser oscillation, and a protective film formed on the facet, wherein a film containing sulfur is provided between the facet and the protective film.
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 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.