摘要:
An example system includes a grating coupled laser, a laser optical interposer (LOI), an optical isolator, and a light redirector. The grating coupled laser includes a laser cavity and a transmit grating optically coupled to the laser cavity. The transmit grating is configured to diffract light emitted by the laser cavity out of the grating coupled laser. The LOI includes an LOI waveguide with an input end and an output end. The optical isolator is positioned between the surface coupled edge emitting laser and the LOI. The light redirector is positioned to redirect the light, after the light passes through the optical isolator, into the LOI waveguide of the LOI.
摘要:
A surface-emitting laser according to one embodiment of the technology includes a laser element section that includes a first multi-layer film reflecting mirror, a first semiconductor layer of a first conductivity type, an active layer, a second semiconductor layer of a second conductivity type, a second multi-layer film reflecting mirror, a nitride semiconductor layer of the second conductivity type, and a light output surface in this order. The laser element section further includes an electrode that injects a current into the active layer.
摘要:
The invention describes a Vertical Cavity Surface Emitting Laser and a method of manufacturing such a Vertical Cavity Surface Emitting Laser. The Vertical Cavity Surface Emitting Laser comprising a first electrical contact (105, 405, 505, 605, 705), a substrate (110, 410, 610, 710), a first distributed Bragg reflector (115, 415, 615, 715), an active layer (120, 420, 620, 720), a distributed heterojunction bipolar phototransistor (125, 425, 625, 725), a second distributed Bragg reflector (130, 430, 630, 730) and a second electrical contact (135, 435, 535, 635, 735), the distributed heterojunction bipolar phototransistor (125, 425, 625, 725) comprising a collector layer (125a), a light sensitive layer (125c), a base layer (125e) and an emitter layer (125f), wherein the distributed heterojunction bipolar phototransistor (125, 425, 625, 725) is arranged such that there is an optical coupling between the active layer (120, 420, 620, 720) and the distributed heterojunction bipolar phototransistor (125, 425, 625, 725) for providing an active carrier confinement by means of the distributed heterojunction bipolar phototransistor (125, 425, 625, 725) such that an optical mode of the Vertical Cavity Surface Emitting Laser is self-positioning in accordance with the active carrier confinement during operation of the Vertical Cavity Surface Emitting Laser. It is the intention of the present invention to provide a VCSEL which can be easily and reliably processed by integrating the distributed heterojunction bipolar phototransistor (125, 425, 625, 725).
摘要:
An optical transmitter including two reflective regions (666,674) formed at two opposite ends of an interference region (670) along a first direction and at least three electrodes (691-693) electrically coupled to the interference region, where the amount of electrical carriers inside the interference region can be modulated by changing the relative electrical fields among the three electrodes, so that the amount of photons generated inside the interference region can be modulated and resonant along the first direction and emit along a second direction that is different from the first direction. Vertical output coupling is realized with a suitable grating (680) upon the interference region (670). The third electrode (693) may be transparent to the emitted light.
摘要:
A semiconductor distributed Bragg reflector (DBR) (110) including a first multilayer structure (103) including a plurality of first semiconductor layers and one or more second semiconductor layers each interposed between a corresponding pair of the plurality of first semiconductor layers; a second multilayer structure (104) including a plurality of third semiconductor layers and one or more second semiconductor layers each interposed between a corresponding pair of the plurality of third semiconductor layers; and a protection layer (105) interposed between the first multilayer structure and the second multilayer structure. The semiconductor layer has a lower decomposition temperature than the first semiconductor layer. The third semiconductor layer has a lower decomposition temperature than the second semiconductor layer.
摘要:
A vertical cavity surface emitting laser (10) includes an active layer (50) that includes a quantum well, a first cladding layer (40) and a second cladding layer (60) between which the active layer (50) is interposed, a first multilayer reflector layer (30) arranged on a side of the first cladding layer (40) opposite to that on which the active layer (50) is arranged, a second multilayer reflector layer (80) arranged on a side of the second cladding layer (60) opposite to that on which the active layer (50) is arranged, a first electrode (91) that is arranged on a side of the first multilayer reflector layer (30) opposite to that on which the first cladding layer (40) is arranged, and a second electrode (92) that is arranged on a side of the second multilayer reflector layer (80) opposite to that on which the second cladding layer (60) is arranged. At least one of the first cladding layer (40) and the second cladding layer (60) includes a low activity energy layer (42, 62) having a band gap that is smaller than a smallest band gap of a optical confinement layer for forming the quantum well of the active layer (50) and larger than a band gap of the quantum well.
摘要:
When configuring a surface emitting laser (100) by a semiconductor material not capable of largely extracting a refractive-index difference, the surface emitting laser using a photonic crystal (160) capable of forming a waveguide is provided.