GaInP/AlGaInP Quantum Well Distributed Bragg Reflector Laser Using Surface Curved Grating

Integration of Surface-Emitting Red Distributed Bragg Reflector Laser and Microfluidic Structure for Biomolecular Sensing

“…The laser consists of a narrow ridge active channel, and second-and third-order curved DBR gratings. 8) By using surface gratings, the regrowth process can be eliminated and the fabrication process can be simplified. QW disordering by Zn diffusion 9) is applied in the DBR regions to reduce the absorption loss.…”

Rotation-Symmetric Multispot Focusing Phase-Shifted Grating Coupler for Integrated Semiconductor Laser

“…2(b). Equation (7) shows that the major spots on the focal plane (x ¼ f cos ) consist of 6 RS spots at ðY fmg ; Z fmg À f sin Þ, fmg ¼ fAE1; þ1; þ1g, fþ1; AE1; À1g, fÀ1; À1; AE1g and one spot at the center ðY fmg ; Z fmg À f sin Þ, fmg ¼ fþ1; À1; þ1g, fÀ1; þ1; À1g. The distance D between adjacent spots is D ¼ 2f =Ã d .…”

“…The phase-shifted GC was fabricated by using a GaInP multiple-quantum-well (MQW) waveguide (gain peak wavelength $660 nm) 5,7) for semiconductor lasers. At first the contact and upper cladding layers were removed by reactive ion etching (RIE).…”

GaInP Red Distributed-Bragg-Reflector Laser Integrated with Phase-Shifted Grating Coupler for Multispot Focusing

“…1. The laser consists of a narrow ridge active channel with curved DBR gratings 8) on both sides. The curved DBR gratings reflect efficiently diverging guided waves from the active channel.…”

“…Third-order curved DBR gratings were designed for laser oscillation at a wavelength of 660 nm. 8) The length of the back DBR grating was determined as 200 mm to provide a high reflectivity, and that of the front DBR grating as 50 mm to obtain a semitransparent reflector. The reflectivity for the back DBR grating was calculated as 91%.…”