Blue lasing at room temperature in an optically pumped lattice-matched AlInN/GaN VCSEL structure
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The principles of gallium arsenide diode lasers are described and the history of developments is sketched. The importance of threshold current density is emphasised and it is shown that confinement of carriers is improved in heterojunctions using gallium-a ...
We report the first successful use, to our knowledge, of InAsP quantum wells for 1.55 mu m wavelength laser emission: 5 quantum well InAsP/InGaAsP horizontal cavity lasers showed 88% internal efficiency, 1.6 cm(-1) losses per well, and 33 A/cm(2) transpare ...
We demonstrate edge-emitting lasers based on self-assembled InAs quantum dots (QDs) on GaAs substrates. The InAs QDs are embedded in an InGaAs quantum well (QW) to red-shift the lasing transition. The lasers emit at lambda=1.2 mum with threshold current de ...
By using chemical beam epitaxy at growth temperatures as low as 460-480 degrees C, we have overcome strain relaxation problems that prevented so far the successful use of InAsP quantum wells in 1.55 mu m lasers. Five quantum well InAsP/InGaAsP horizontal c ...
New luminescence centers can be generated by irradiating AlxGa1-xAs structures with focused light from a CW Kr-ion laser operated at 647 nm. The luminescence centers are generated at a laser power density of 0.5 MW/cm2. Regions as small as 0.8 μm wide a ...
Fiber gratings irradiated by CW-laser show a breaking strength and a lifetime performance similar to that of pristine fiber, on pulsed KrF-laser irradiation. In this paper we report on the mechanical reliability of fibers irradiated by UV light using the s ...