摘要:
A vertical cavity surface emitting laser (VCSEL) device comprising a VCSEL emitter having a waveguide with a guided portion and an antiguided portion is disclosed. The guided and antiguided portions may select and confine a mode of the VCSEL emitter. The antiguided portion may also be used to coherently couple adjacent VCSEL emitters.
摘要:
A semiconductor optoelectronic device (650) includes at least one cavity (660) and one multilayered interference reflector (650, 630). The cavity (660) is designed preferably to possess properties of an antiwaveguiding cavity, where no optical modes propagate in the lateral plane. The existing optical modes are the modes propagating in the vertical direction or in a direction tilted to the vertical direction (633) at an angles smaller than the angle of the total internal reflection at the semiconductor/air interface. This design reduces the influence of parasitic optical modes and improves characteristics of optoelectronic devices including vertical cavity surface emitting lasers, tilted cavity lasers emitting through the top surfce or the substrate, vertical or tilted cavity resonant photodetectors, vertical or tilted cavity resonant optical amplifiers, and light-emitting diodes.
摘要:
A semiconductor laser including a semiconductor substrate and a multilayer structure formed upon the semiconductor substrate, the multilayer structure including an active layer, a pair of cladding layers between which the active layer is interposed, and a current confinement layer for injecting a current into a stripe-shaped predetermined region of the active layer. The current confinement layer comprises a first current blocking layer formed in regions thereof excluding a region corresponding to the predetermined region of the active layer. The first current blocking layer has a refractive index higher than a refractive index of the pair of cladding layers and an energy band gap larger than an energy band gap of the active layer.
摘要:
Die vorliegende Erfindung betrifft einen Breitstreifenlaser mit hoher Effizienz und einer geringen Fernfelddivergenz. Es ist Aufgabe der vorliegenden Erfindung, einen Breitstreifenlaser mit einer geringen Fernfelddivergenz bei gleichzeitig hoher Ausgangsleistung anzugeben. Weiterhin soll der erfindungsgemäße Breitstreifenlaser preisgünstig herstellbar sein. Erfindungsgemäß weisen die aktive Schicht (10), der erste Kontakt (22) und der zweite Kontakt (24) jeweils eine Breite (W) größer als 10 µm auf, und es ist weiterhin eine Antiwellenleiterschicht (20) seitlich des zwischen den Kontakten (22, 24) eingeschlossenen, aktiven Gebiets angeordnet, wobei die Brechzahl der Antiwellenleiterschicht (20) größer als die minimale Brechzahl der Mantelschichten (14, 22) ist, und wobei der minimale Abstand (d x ) zwischen der Antiwellenleiterschicht (20) und einer Projektion einer der Kontakte (24) in die Ebene der Antiwellenleiterschicht (20) zwischen 0 und 50 µm beträgt.
摘要:
Diode lasers type of devices with good coupling between field distribution and gain are disclosed. A single element has a flat field distribution that couples with the uniform current injection in a contact region. A multi element array having almost flat field distribution in each element and almost equal amplitude for the field intensity in all elements is provided. Injection by multiple contacts couples well with the overall field distribution. Also, the lasers are stable against filament formation and mode switching.
摘要:
A semiconductor laser including a semiconductor substrate and a multilayer structure formed upon the semiconductor substrate, the multilayer structure including an active layer, a pair of cladding layers between which the active layer is interposed, and a current confinement layer for injecting a current into a stripe-shaped predetermined region of the active layer. The current confinement layer comprises a first current blocking layer formed in regions thereof excluding a region corresponding to the predetermined region of the active layer. The first current blocking layer has a refractive index higher than a refractive index of the pair of cladding layers and an energy band gap larger than an energy band gap of the active layer.