
Features
Harold Features
- Advanced hetero-structure model for simulating FP lasers/SOAs based on well-established physical models:
- Self-consistent solving of electro-optic, heat flow, carrier capture/escape and recombination equations
- Supports strained layers
- Built-in optical mode solver
- Nuilt-in Schrodinger solver
- Layers editor allows near-arbitrary (single and MQW) epitaxial layer structures to be defined; supports grading of alloy composition and doping within layers.
- Material database: comes with a set of standard materials; you can add your own materials too.
- Various simulation options:
- 1d (vertical) or 2d (vertical + longitudinal)
- isothermal (pulsed) or self-heating (CW) modes.
- Comprehensive simulation results:
- optical/electrical/thermal characteristics of device
- vertical and vertical-longitudinal profiles of numerous quantities
- quantities vs. bias
- spontaneous emission and gain spectra
- quantum well wavefunctions.
- XY Laser Module extends Harold’s capability into the x-dimension for modelling lateral structure:
- Cross-section editor allows full physical definition of laser cross-section – supports graded etching, insulating layers, and multiple contacts on same side
- 2D+Z finite difference mode solver (see here for details of FDM Solver) with farfield calculator; optical mode can be updated with increasing bias to account for hot-cavity effects
- Simulation results include 2D vertical-lateral profiles of numerous quantities
- VCSEL Module (option): Full 3D VCSEL model, taking into account optical, electrical and thermal effects.
- Quantum-Confined Stark Effect (QCSE) Module (option): advanced physical model allowing to simulate electro-absorption modulators (EAM) with Quantum-Confined Stark Effect.
- Link with PICWave: export material files, gain and spontaneous emission spectra files and epitaxial layer structures (SWGs) to PICWave for fast time-domain simulation
- Extensive command-line interface, support for scripting with Python and MATLAB
Click the links on the left for more Features information.