Quantum dot laser simulator.

Photon Design has officially released its HAROLD QD, quantum dot laser simulation tool.

HAROLD QD enables engineers to model a quantum dot (QD) laser’s multi-layer, graded epitaxy structure, including dot size and distribution. It has an eight-band, K.P-based modeller to calculate the energy levels of the quantum dots, where previously it was six-band. As an evolution of the company’s HAROLD, hetero-structure semiconductor and laser simulator, developed over many years, HAROLD QD enables engineers to produce 3-D stress and strain models for each quantum dot shape. From this, HAROLD QD also allows engineers to calculate QD laser gain and absorption spectra, which reliably match the results of quantum dot lasers in field tests.

Dr. Dominic Gallagher, CEO of Photon Design, said, “OFC is the leading, global exhibition for the optical communications and networking supply chain; an ideal platform to officially launch HAROLD QD. Quantum dot lasers are critical to next-generation data centres, AI, and HPC applications and HAROLD QD puts Photon Design at the forefront of their design. QD lasers offer unparalleled, high-temperature operation, when compared to existing lasers, along with superior modulation, data transmission performance and power efficiency. They also bring practical, silicon-based manufacturing benefits, where quantum dots can be grown directly on silicon waveguides.

“HAROLD QD enables engineers to work in a single, integrated environment for gain materials, including InP and silicon. Seamless integration into Photon Design’s PICWAVE, to give engineers three-dimensional, time evolving, quantum dot laser models will follow.”

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