Low threshold current MOVPE grown GaInAs-Al(Ga)InAs separate confinement heterostructure multiquantum well metal-clad ridge-waveguide lasers emitting at 1585 nm
GaInAs-Al(Ga)InAs separate confinement heterostructure (SCH) multiquantum-well (MQW) metal-clad ridge-waveguide (MCRW) laser diodes were successfully fabricated for the first time from layer structures grown by atmospheric pressure (AP) metalorganic vapor-phase epitaxy (MOVPE) on InP substrate without any use of phosphine. CW operation of 2.9- mu m-wide and 400- mu m-long MCRW laser diodes emitting at 1585 nm was demonstrated with a minimum threshold current of 38 mA.<<ETX>>
Large-area metal-organic vapour phase epitaxy for optoelectronic integrated circuits and photonics
Abstract Metal-organic vapour phase epitaxy (MOVPE) has demonstrated the capability of producing the most sophisticated multilayer, low-dimensional device structures of InGaAsP on InP with amazing accuracy over large single wafers and even over several wafers in a batch. This is necessary since the optoelectronic devices are characterized by a high complexity and a large aspect ratio which requires extreme uniformity at the epitaxy level. The rotating susceptor reactors have an edge over the static designs in this respect. The replacement of the highly toxic arsine and phosphine with much safer organo-metallic precursors seems quite feasible, adding further credibility to MOVPE as the final industrial answer in integrated optoelectronics.
Finite Difference Modeling on the Temperature Field of Substrate in Friction Surfacing
Friction surfacing is an advanced process of great potential, especially in the field of repair and reclamation of worn and damaged components. As a kind of thermal processing technology, the temperature profile and changes of the substrate in friction surfacing are important factors to get coatings of high quality. In this paper, the temperature field of the substrate during the process is simulated by finite difference method. The results are consistent with experiments, reappearing the temperature change of the substrate during friction surfacing, allowing further study on figuration and quality of coatings.