Widely tunable monolithically integrated lasers using intracavity Mach-Zehnder interferometers

Using monolithic integration technology we have designed and fabricated tunable lasers in the 1.5 µm region with a demonstrated tuning range of 60 nm and single mode operation. This performance is achieved using intracavity tunable Mach-Zehnder interferometers that use voltage controlled phase modulators. In this paper we will discuss design considerations and advantages of such tunable lasers

MMI reflectors with free selection of reflection to transmission ratio

We investigate a new class of integrated mirrors, so called MMI reflectors. In addition to one-port full reflectors, we introduce two-port MMI reflectors, capable of both reflection and transmission. The reflection to transmission ratio in these devices can be set freely by changing their geometry. This is deinonstrated through numerical simulations as well as through a set ofworking devices realized on an indium phosphide layer stack

MMI reflectors with free selection of reflection to transmission ratio

We investigate a new class of integrated mirrors, so called MMI reflectors. In addition to one-port full reflectors, we introduce two-port MMI reflectors, capable of both reflection and transmission. The reflection to transmission ratio in these devices can be set freely by changing their geometry. This is deinonstrated through numerical simulations as well as through a set ofworking devices realized on an indium phosphide layer stack

Quantum dot twin stripe lasers as emitter and receiver in chaotic encrypted communication systems

The complex nonlinear and chaotic regimes observed in laterally coupled diode lasers – or twin stripe lasers– make this device a real contender for the emitter and receiver in chaotic encrypted communication systems, since the chaos is produced on chip and no other elements have to be added to the set-up. The main problem until now was to be able to synchronize two of those devices, due to the difficulty of fabricating a pair similar enough. Our approach is to use Quantum Dots for the active region of the twin stripes, which allows for the use of shallow etching to electrically isolate both stripes due to the zero dimensional confinement of the Quantum Dots. In this paper we present the first time that a pair of twin stripe lasers has been synchronized together with an observation of transitions to chaos such as those found in single-stripe lasers subject to external influences

Quantum dot twin stripe lasers as emitter and receiver in chaotic encrypted communication systems

The complex nonlinear and chaotic regimes observed in laterally coupled diode lasers – or twin stripe lasers– make this device a real contender for the emitter and receiver in chaotic encrypted communication systems, since the chaos is produced on chip and no other elements have to be added to the set-up. The main problem until now was to be able to synchronize two of those devices, due to the difficulty of fabricating a pair similar enough. Our approach is to use Quantum Dots for the active region of the twin stripes, which allows for the use of shallow etching to electrically isolate both stripes due to the zero dimensional confinement of the Quantum Dots. In this paper we present the first time that a pair of twin stripe lasers has been synchronized together with an observation of transitions to chaos such as those found in single-stripe lasers subject to external influences

First demonstration of single-layer InAs/InP (100) quantum-dot laser : continuous wave, room temperature, ground state

Reported is the first InAs/InP (100) quantum-dot (QD) laser operating in continuous-wave mode at room temperature on the QD ground state transition employing a single-layer of QDs grown by metal organic vapour phase epitaxy. The necessary high QD density is achieved by growing the QDs on a thin InAs quantum well (QW). These QDs on the QW laser exhibit a high slope efficiency and a lasing wavelength of 1.74 µm, which is important for biomedical applications

Scalable quantum dot based optical interconnects

Scalable quantum dot based optical switches offer energy-efficient low-latency data routing. Low power penalty routing over multiple stages are feasible with with the prospect of larger scale photonic integration