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Harold

The Hetero-structure Laser Diode Model

Harold

Introducing Harold

Design a variety of multi-layer graded epitaxy lasers with simulations that account for a large (and growing) number of physical effects. Find a cross section’s gain spectra and export to companion tool PICWave for full 3D time domain laser / amplifier simulations.

An epitaxial layer structure defined in Harold. Shown here are the core layers of a 4QW InGaAsP structure.

From 1D Epitaxy...

Deploy our growing database of materials to build epitaxy structures with multiple quantum wells / dots or add your own experimental data to define your epitaxy structure.

From 1D Epitaxy...
XY current density vector plot for ridge waveguide laser – illustrating the current spreading that occurs as the current flows out of the ridge and down to the active region

...To 2D Simulations...

Deploy Harold simulations in 2D both along the direction of propagation (1D +Z) or examining the optical, electrical, and thermal physics in the cross section (Harold XY).

...To 2D Simulations...
Mode Locked Laser png

...To 3D Laser Devices

Export gain and absorption spectra results to our companion time domain circuit simulator PICWave to build 3D devices such as modulators, amplifiers, and laser diodes.

...To 3D Laser Devices

Expansions to Harold

Make use of market leading functionality with EigenMode Expansion simulations. Return 3D simulation results for passive PIC components and fiber geometries orders of magnitude faster than other popular simulation methods.

Harold 1

VCSEL Module

Optical, electrical, and thermal simulations in a single environment; see the results when Photon Design combines decades of experience in two of our areas of expertise.

VCSEL Module
Absorption spectra for various values of bias for the TE polarisation.

QCSE Module

Run reverse bias simulations taking into account the Quantum Confined Stark Effect used for Electro-Absorption Modulators (EAM), Electro Refractive Modulators (ERM), and saturable absorbers in mode-locked lasers.

QCSE Module
Qdotcartoon

Quantum Dot Module

Optical, electrical, and thermal simulations in a single environment; see the results when Photon Design combines decades of experience in two of our areas of expertise.

Quantum Dot Module

Feature Highlights

Harold 1
Imported gain curves (green) and fitted gain curves (blue) plotted against wavelength for different carrier densities
(a) with a parabolic gain fitting (b) with the Wide-Band Gain Fitting.

Lets Get Started...

The best way to learn more is to talk with our experts and test out the software yourself

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