摘要:
The invention concerns a stripe laser diode element exhibiting longitudinal direction of propagation in the main direction of propagation of a laser light and having contacts in longitudinal direction of propagation on one surface with the purpose of impressing a current on the element. The surface in defined by edges crosswise to the longitudinal direction. An absorption region is formed in the area of said edges.
摘要:
A compound semiconductor laser, comprises a first cladding layer (104) of a III group nitride semiconductor farmed on a substrate (101), an active layer (106) of a III group nitride semiconductor formed on the first cladding layer (104), a second cladding layer (108) of a III group nitride semiconductor formed on the active layer (105), said second cladding layer (108) having a projecting portion on an upper surface side, and a ridge structure of a III group nitride semiconductor, a portion of said ridge structure being said projecting portion of the second cladding layer (108). The projecting portion of the second cladding layer (108) is interposed by a buried layer (110) which does not substantially absorb light output from the active layer.
摘要:
A semiconductor laser array apparatus, comprising: a first laser array structure which includes a plurality of first laser oscillation units arranged side by side at an interval, and a first current blocking material filling a space between each pair of adjacent laser oscillation units and, a second laser array structure which includes a plurality of second laser array structure arranged side by side at an interval and a second current blocking material filling a space between each pair of adjacent second laser oscillation units. Here, laser beams from the activated first and second laser array structures leak to the outside of those laser array structure so as to form first and second distribution regions of the laser beams respectively, and the first and second laser array structures are close to each other so that the first and second distribution regions contact or overlap with each other.
摘要:
A semiconductor laser array apparatus including: a substrate; a plurality of current blocking elements that are stripe shaped and are formed on the substrate; and a plurality of light waveguides that are formed between the plurality of current blocking elements, where at least two adjacent light waveguides are optically connected by removing a part of each current blocking element therebetween.
摘要:
A semiconductor laser having a single transverse mode operation. Optical power higher than that generated by conventional pump lasers is achieved by widening the gain medium without inducing the second transverse mode. This is accomplished by providing a small refractive index difference between active and blocking regions of the laser. The refractive index difference between the laser active region material and the laser blocking region material at the fundamental frequency is less than about 0.029.
摘要:
A compound semiconductor laser of a III group nitride semiconductor of the present invention includes a first cladding layer 104 of a first conduction type formed on a substrate 101 , an active layer 106 formed on the first cladding layer, a second cladding layer 108 of a second conduction type formed on the active layer 106 , and a buried layer 110 formed on the second cladding layer 108 , the buried layer having an opening portion for constricting a current in a selected region of the active layer, wherein an upper portion of the second cladding layer 108 has a ridge portion, the ridge portion residing in the opening portion of the buried layer 110 , and the buried layer 110 does not substantially absorb light output from the active layer 106 , and the buried layer has a refractive index which is approximately identical with that of the second cladding layer 108 .
摘要:
Die Erfindung betrifft einen Strahlung emittierenden Halbleiterchip (1), der eine aktive Zone (2) zur Erzeugung von Strahlung der Wellenlänge Lambda und einen strukturierten Bereich (3) mit unregelmäßig angeordneten Strukturelementen aufweist, die ein erstes Material mit einem ersten Brechungsindex n 1 enthalten und die von einem Medium umgeben sind, das ein zweites Material mit einem zweiten Brechungsindex n 2 aufweist, wobei die Dicke einer Zwischenschicht, welche die Strukturelemente und das Medium aufweist, einer maximalen Höhe der Strukturelemente entspricht, wobei für einen effektiven Brechungsindex neff der Zwischenschicht n2
摘要:
A semiconductor light emitting element includes a first clad layer (14) of a first conductivity type provided on a substrate (10); an active layer (18) provided on the first clad layer (14); a second clad layer (26) of a second conductivity type provided on the active layer (18), an upper portion of the second clad layer (26) implements a ridge (32) extending in a predetermined direction; a pair of first current block layers (4) provided on the second clad layer (26) sandwiching the ridge (32) along the extending direction; and a pair of second current block layers (6) provided between the first current block layers (4) on the second clad layer (26) and at sidewalls of the ridge to be contacted with the first current block layers, sandwiching selectively a region including an edge of the ridge (32), the second current block layers (6) having a refractive index larger than the first current block layers (4) at an emission peak wavelength of the active layer (18).
摘要:
A compound semiconductor laser, comprises a first cladding layer (104) of a III group nitride semiconductor formed on a substrate (101), an active layer (106) of a III group nitride semiconductor formed on the first cladding layer (104), a second cladding layer (108) of a III group nitride semiconductor formed on the active layer (106), said second cladding layer (108) having a projecting portion on an upper surface side, and a ridge structure of a III group nitride semiconductor, a portion of said ridge structure being said projecting portion of the second cladding layer (108). The projecting portion of the second cladding layer (108) is interposed by a buried layer (110) which does not substantially absorb light output from the active layer.
摘要:
A self-aligned type semiconductor laser device which is capable of oscillation at high optical output, scarcely develops COMD, and maintains high reliability for a long term. The SAS type semiconductor laser device has an active layer, and a low refractive-index layer formed close the active layer and functioning also as a current blocking layer. The low refractive-index layer includes a plurality of compound semiconductor layers made of Al x Ga 1-x As (0 ≤ x ≤ 1), and the compound semiconductor layers have refractive indices thereof set such that the refractive index lowers with increasing distance from the active layer. Specifically, the low refractive-index layer includes a plurality of AlGaAs layers, and the AlGaAs layers have contents of Al thereof set such that the content of Al increases with increasing distance from the active layer.
摘要翻译:能够在高光输出下振荡的自对准型半导体激光器件几乎不发展COMD,并且长期保持高可靠性。 SAS型半导体激光器件具有有源层和靠近有源层形成并且还用作电流阻挡层的低折射率层。 低折射率层包括由Al x Ga 1-x As(0≤x≤1)制成的多个化合物半导体层,并且化合物半导体层具有这样的折射率,其设定为使得折射率随着离活性层的距离增加而降低。 具体而言,低折射率层包括多个AlGaAs层,并且AlGaAs层的Al含量被设定为使得Al的含量随着与有源层的距离增加而增加。