Integrated Optics, Silicon and III-V Integrated Photonics

  • Design and optimization of large-scale active or passive photonic integrated circuits

  • Customized design of passive photonic components based on Python cosimulation interface

  • Customized design of active, nonlinear, and optoelectronic components based on Python, Matlab®, C++, or COM cosimulation interfaces

  • Dynamically tunable passive components: optical filters, optical delay lines, phase shifters, interleavers

  • Microring-based photonic circuits (add-drop filters, optical delay lines, ring modulators, polarization converters), with the possibility to specify the number of coupled rings by user-defined parameters

  • Waveguide Bragg gratings with individually specified index and loss coupling profiles for different guided modes (uniform, phase-shifted, apodized and chirped gratings, uniform and nonuniform sampled gratings, nonreciprocal gratings)

  • Design and optimization of MMI-based components and circuits with the possibility to switch between idealized and realistic MMI performance, visualization of MMI internal fields (3D and density plots, crosssection field profiles)

  • Nonlinear Silicon waveguides: Kerr and TPA effects

  • Integrated recirculating optical buffers

  • Nonlinear switching in ring resonators

  • Transmitters and receivers of advanced modulation formats: PSK, DPSK, DQPS, mPSK, QAM, mQAM, etc

  • Optical interconnects

Multisection/Tapered Optoelectronic Devices: SOAs, Lasers, Modulators, Photodetectors

  • Multiplesection semiconductor lasers and lasers with longitudinally dependent parameters (tapered or FBG-stabilized lasers) including MQW/bulk active/DFB/DBR/passive device sections and reflective interfaces between them

  • Widely tunable or multichannel lasers with sampled Bragg gratings, ring-resonator reflectors, or AWGs

  • Gain-clamped and reconfigurable semiconductor optical amplifiers (SOA, RSOA)

  • Electro-absorption (Franz-Keldysh and Stark effects) modulators with frequency- and voltage-dependent absorption

  • Electro-optical (Pockels and Kerr effects) modulators

  • Active, passive, ring and hybrid mode-locked lasers to determine amplitude and timing stability of ultrafast sources

  • 2R and 3R regenerators, optimization of their speed, transfer characteristics and induced chirp

  • Laser dynamics including spectrum evolution, dynamic and adiabatic chirp, spectral hole burning (SHB), turn-on jitter, intensity noise and patterning due to deep modulation

  • Simulate mode hopping in Fabry-Perot lasers

  • Investigate instabilities due to physical processes, such as spatial hole burning in lasers

  • Find optimum mixes of gain, loss and index coupling for power, spectral stability and feedback insensitivity in high-power lasers

  • Enhance modulation speed using MQW materials, gain coupling and optimized drive waveforms for high-speed lasers

  • Quantify antireflection coating specifications by simulating the full interaction of the laser and the modulator

  • Develop fast switches, optical logic, modulators, detectors, edge detectors, gain flatteners, and semiconductor amplifiers

  • Compare XPM, XGM and FWM wavelength conversion for speed, noise and conversion range

  • Extract laser parameters from simple laboratory measurements, explore design variations based on the real device configuration

Electric and Digital Circuits

  • Active linear, RLC, RC and LC electrical filters

  • Transmission lines

  • Digital logic circuits

  • Modulator and laser drivers (linearized equivalent circuits)

  • Analog-to-digital (ADC) and digital-to-analog (DAC) converters

Optical Fiber Systems