Ridge waveguide sampled grating DBR lasers with 22-nm quasi-continuous tuning range

InP Photonic Integrated Circuit and DWDM-on-Chip Technology

“…3. The butt-joint regrowth method [3] offers high versatility in terms of the energy bandgap difference achievable. In butt joint regrowth, the original waveguide is removed by wet or dry etching, after that the second structure is grown.…”

On‐Chip Integration of Functional Hybrid Materials and Components in Nanophotonics and Optoelectronics

“…However, allowing only for two band edges at most (one from MQW and one from the waveguide) is a drawback of this method [4] . The offset quantum well method can be improved with the addition of a wider band gap quantum well in the passive waveguide [6] , known as dual offset quantum wells, shown in Figure 12.2 a. This improvement provides more effi cient electroabsorption and phase modulators by using a quantum -confi ned Stark effect resulting in a more abrupt absorption edge [2] .…”

Blue‐shift of phosphorous‐implanted InGaAs/InGaAsP MQW laser structures by two‐step anneals

“…Until now, there are several monolithic integration techniques that have been used in the past, such as the use of an offset QW active region [5], a butt-joint regrowth technique [6], a selective area growth (SAG) method [7] and a quantum-well intermixing (QWI) technique [3,4,8] to enable numerous components to be formed on the same chip with a common fabrication process. Selective area epitaxy as well as etching and regrowth techniques repeat the use of expensive epitaxial growth processes, thus reducing the prospects of low-cost volume production of PICs.…”