Integration of 1.3-$\mu{\rm m}$ Quantum-Dot Lasers With ${\rm Si}_{3}{\rm N}_{4}$ Waveguides for Single Mode Optical Interconnects

Abstract

A single mode photonic integrated circuit, consisting of a monolithically integrated quantum-dot laser and a suitably designed <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">${\rm Si}_{3}{\rm N}_{4}$</tex></formula> waveguide, is demonstrated. The 1.3- <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\mu{\rm m}$</tex></formula> quantum-dot laser incorporates a superlattice barrier, p-doping, and tunnel injection in the active region, demonstrating operation up to 85 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$^{\circ}{\rm C}$</tex></formula> with excellent temperature stability (high <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">${\rm T}_{0}$</tex></formula> ). The two devices are optimally groove coupled to minimize the losses. Integration of the tapered waveguide with a quantum-dot cross laser is also demonstrated.