VPItoolkit PDK SMART is a pluggable toolkit which extends VPIcomponentMaker Photonic Circuits by adding the support of the InP photonics PDK for the Multi-Project Wafer MPW runs offered by SMART Photonics.

It enables the rapid design of Indium Phosphide photonics semiconductors for their subsequent fabrication at the independent SMART Photonics foundry.

VPItoolkit PDK SMART - BBs list

Overview of building blocks available in VPItoolkit PDK SMART

Design Example

Widely Tunable Laser Source

The PIC design flow is demonstrated by simulating a widely tunable laser source, based on a design idea published in [1]. All the waveguide lengths are important here not only inside each MZI, but also the total length of the whole ring laser cavity. After designing MZIs with proper free spectral ranges (FSRs), matched with the FSR of the whole circuit, and applying estimated voltages to all the phase modulators, one can obtain results as shown below: single-mode lasing at almost any desired wavelength (side-lobe lines are due to not perfectly chosen voltages).

[1] S. Latkowski et al., Novel Widely Tunable Monolithically Integrated Laser Source, IEEE Photonics Journal, vol. 7, No. 6, 1503709 (Dec 2015).

VPItoolkit PDK SMART - Design Example Layout

Automatically exported layout in OptoDesigner

VPItoolkit PDK SMART - Design Example Setup

Simulation setup with all the building blocks and key parameters

VPItoolkit PDK SMART - Design Example Results

Simulated laser spectra for different phase modulator settings