摘要:
Provided is a vertical light emitting device comprising an upper multilayer reflective film and a lower multilayer reflective film that are formed facing each other and oscillate light; an intermediate layer that is formed below the upper multilayer reflective film and includes a layer having a different composition than the upper multilayer reflective film; and an electrode portion that is formed to sandwich the intermediate layer in a cross-sectional plane parallel to an oscillation direction of the light and to have a top end that is higher than a top surface of the intermediate layer. After the electrode portion is formed to sandwich the intermediate layer, the upper multilayer reflective film is layered on the intermediate layer.
摘要:
Provided is a surface emitting laser element array of low cost and high reliability. The surface emitting laser element array has a substrate having a semiconductor of a first conduction type; and a plurality of surface emitting laser elements each having, above the substrate, an active layer sandwiched between a first conduction type semiconductor layer area and a second conduction type semiconductor layer area and disposed between a upper reflective mirror and a lower reflective mirror, the surface emitting laser elements being separated from each other by an electric separation structure formed having such a depth as to reach the substrate. The first conduction type semiconductor layer area is arranged between the substrate and the active layer. The surface emitting laser element array further has a current blocking layer arranged between the substrate and the first conduction type semiconductor layer area; and two electrodes connected to the first conduction type semiconductor layer area and the second conduction type semiconductor layer area, respectively, and arranged on a side of the current blocking layer opposite to the substrate.
摘要:
Provided is a surface emitting laser element array of low cost and high reliability. The surface emitting laser element array has a substrate having a semiconductor of a first conduction type; and a plurality of surface emitting laser elements each having, above the substrate, an active layer sandwiched between a first conduction type semiconductor layer area and a second conduction type semiconductor layer area and disposed between a upper reflective mirror and a lower reflective mirror, the surface emitting laser elements being separated from each other by an electric separation structure formed having such a depth as to reach the substrate. The first conduction type semiconductor layer area is arranged between the substrate and the active layer. The surface emitting laser element array further has a current blocking layer arranged between the substrate and the first conduction type semiconductor layer area; and two electrodes connected to the first conduction type semiconductor layer area and the second conduction type semiconductor layer area, respectively, and arranged on a side of the current blocking layer opposite to the substrate.
摘要:
Provided is a laser device comprising a substrate, an active layer, and a current confinement layer. The current confinement layer includes an oxide layer that is formed extending from a edge of the current confinement layer in a parallel plane parallel to a surface of the substrate, toward a center of the current confinement layer along the parallel plane, and that does not have an inflection point between the edge and a tip portion formed closer to the center or has a plurality of inflection points formed between the edge and the tip portion.
摘要:
A surface emitting laser element includes an active layer and a dielectric multilayer mirror formed with a plurality of dielectric layers having different refractive indices for reflecting a light generated in the active layer. At least one of boundaries between the dielectric layers is formed to have a predetermined surface roughness to obtain a desired target reflectance of the dielectric multilayer mirror.
摘要:
A surface emitting laser element includes an active layer and a dielectric multilayer mirror formed with a plurality of dielectric layers having different refractive indices for reflecting a light generated in the active layer. At least one of boundaries between the dielectric layers is formed to have a predetermined surface roughness to obtain a desired target reflectance of the dielectric multilayer mirror.
摘要:
A semiconductor laser element includes a first electrode, a second electrode, a first reflecting mirror, a second reflecting mirror, and a resonator. The resonator includes an active layer, a current confinement layer, a first semiconductor layer having a first doping concentration formed at a side opposite to the active layer across the current confinement layer, and a second semiconductor layer having a second doping concentration higher than the first doping concentration formed between the first semiconductor layer and the current confinement layer. The first electrode is provided to contact a part of a surface of the first semiconductor layer. The first semiconductor layer has a diffusion portion into which a component of the first electrode diffuses. The second semiconductor layer contacts the diffusion portion. The second semiconductor layer is positioned at a node of a standing wave at a time of laser oscillation of the semiconductor laser element.
摘要:
A semiconductor laser element includes a first electrode, a second electrode, a first reflecting mirror, a second reflecting mirror, and a resonator. The resonator includes an active layer, a current confinement layer, a first semiconductor layer having a first doping concentration formed at a side opposite to the active layer across the current confinement layer, and a second semiconductor layer having a second doping concentration higher than the first doping concentration formed between the first semiconductor layer and the current confinement layer. The first electrode is provided to contact a part of a surface of the first semiconductor layer. The first semiconductor layer has a diffusion portion into which a component of the first electrode diffuses. The second semiconductor layer contacts the diffusion portion. The second semiconductor layer is positioned at a node of a standing wave at a time of laser oscillation of the semiconductor laser element.
摘要:
In the surface emitting laser, low threshold electric current and high-power output are achieved while maintaining single mode characteristics. The surface emitting laser comprises a layered structure formed on a GaAs substrate 10 is comprised of: a semiconductor lower DBR mirror 12, a cladding layer 14, a n-type contact layer 16, an active layer 18, an electric current constricting layer 20, a p-type cladding layer 22, a p-type contact layer 24, a phase adjusting layer 36 and a dielectric upper DBR mirror 28. The surface emitting laser should be formed such that the diameter X (μm) of the opening diameter of the previously mentioned electric current constricting layer 20 and diameter Y (μm) of the phase adjusting layer satisfy the following relation:X+1.9λ≦Y≦X+5.0λ (wherein λ indicates oscillation wavelength (μm) of the surface emitting laser).
摘要翻译:在表面发射激光器中,在保持单模特性的同时实现了低阈值电流和高功率输出。 表面发射激光器包括形成在GaAs衬底10上的分层结构,包括:半导体下DBR反射镜12,包层14,n型接触层16,有源层18,电流限制层20, p型覆层22,p型接触层24,相位调整层36和电介质上DBR反射镜28.表面发射激光器应形成为使得表面发射激光的直径X(mum) 前述的电流限制层20和相位调整层的直径Y(母)满足以下关系:X +1.9λλ= Y <= X +5.0λ(其中λ表示表面发射激光器的振荡波长(mum) )。
摘要:
In the surface emitting laser, low threshold electric current and high-power output are achieved while maintaining single mode characteristics. The surface emitting laser comprises a layered structure formed on a GaAs substrate 10 is comprised of: a semiconductor lower DBR mirror 12, a cladding layer 14, a n-type contact layer 16, an active layer 18, an electric current constricting layer 20, a p-type cladding layer 22, a p-type contact layer 24, a phase adjusting layer 36 and a dielectric upper DBR mirror 28. The surface emitting laser should be formed such that the diameter X (μm) of the opening diameter of the previously mentioned electric current constricting layer 20 and diameter Y (μm) of the phase adjusting layer satisfy the following relation:X+1.9λ≦Y≦X+5.0λ (wherein λ indicates oscillation wavelength (μm) of the surface emitting laser).
摘要翻译:在表面发射激光器中,在保持单模特性的同时实现了低阈值电流和高功率输出。 表面发射激光器包括形成在GaAs衬底10上的分层结构,包括:半导体下DBR反射镜12,包层14,n型接触层16,有源层18,电流限制层20, p型覆层22,p型接触层24,相位调整层36和电介质上DBR反射镜28.表面发射激光器应形成为使得表面发射激光器的开口直径的直径X(μm) 上述电流限制层20和相位调整层的直径Y(μm)满足以下关系:X +1.9λ&nlE; Y&nlE; X +5.0λ(其中λ表示表面发射激光器的振荡波长(μm))。