New products

• VPIlabExpert™

  
  Bridging the Gap between Simulations and Experiments

  This new product makes VPIphotonics’ advanced signal processing and analysis functions available for the lab environment. This includes the generation, detection and performance analysis of DP-mQAM, 4D, OFDM, radio and other signal formats, application of sophisticated digital pre-distortion and equalization techniques, encoding and decoding with forward-error correction codes, emulation of component limitations and transmission impairments.

  • Reduce efforts in the lab by applying ready-to-use advanced functionalities
  • Virtualize lab equipment by emulating optical and electrical components
  • Develop lab-ready signal processing solutions using simulations
  • Unify methodologies and tools for simulation and lab environments

  

  more

• VPImodeDesigner™

  
  Analysis and optimization of straight anisotropic and bent isotropic optical waveguides and related devices

  This versatile simulation framework supports the analysis and optimization of integrated photonic waveguides and related devices. It implements fullvectorial and semi-vectorial finite-difference mode solvers with support of widely customizable non-uniform meshing and perfectly matched layer absorbing boundaries. Full integration with VPIcomponentMaker Photonic Circuits allows translating waveguide cross-section definitions into model parameters of passive and active devices.

  • Facilitate advanced layout definitions and optimization tasks via powerful Python interface
  • Model straight waveguides made of dispersive anisotropic materials
  • Model bent waveguides made of dispersive isotropic/lossy materials
  • Verify cross-sections and analyze results using advanced visualization capabilities

  

  more

Live Demonstrations

• Photonic Integrated Circuits in InP and Silicon

• Optical Fiber-Based Devices: Lasers, Amplifiers, Signal Processing

• Linear Electric Circuits

• 100Gb, 400Gb and beyond

• Lab-proven DSP Algorithms

• Aggregation, Optical Access and RF-over-Fiber

• Transients and Dynamic Network Reconfiguration

• Cost-optimized Equipment Configuration

Additional information required on a particular subject? Interested in discussing specific topics? Arrange a meeting with a member of the VPI R&D team. Please indicate your name, company, the issue you want to discuss and your availability during the conference.

Contributions to SPIE Photonic West 2015 Conference Program

Conference 9359, Session 1 Optical Nonlinearity Based Devices
Mon, 9 February 2015, 10.30-12:00

Ultra-Long Fiber Raman Lasers – Design Considerations

I. Koltchanov, D. Kroushkov, A. Richter

Abstract: In frame of the European Marie Currie project GRIFFON the usage of a green approach in terms of reduced power consumption and maintenance costs is envisioned for long-span fiber networks. This shall be accomplished by coherent transmission in unrepeatered links (100km – 350km) utilizing ultra-long fiber Raman laser (URFL)-based distributed amplification, multi-level modulation formats, and adapted Digital Signal Processing (DSP) algorithms.
The URFL uses a cascaded 2-order pumping scheme where two ~1365nm pumps illuminate the fiber. The URFL oscillates at ~1450nm whereas amplification is provided by stimulated Raman scattering (SRS) of the 1365nm pumps and the optical feedback – realized by two FBGs at the fiber ends reflecting at 1450nm. The light field at 1450nm provides amplification for signal waves in the 1550nm range due to SRS.
In this work we present URFL design studies intended to characterize and optimize the power and noise characteristics of the fiber links. We use a bidirectional fiber model describing propagation of the signal, pump and noise powers along the fiber length. From the numerical solution we evaluate the on/off Raman gain and its bandwidth, the signal excursion over the fiber length, OSNR spectra, and the accumulated nonlinearities. To achieve best performance for these characteristics the laser design is optimized with respect to the forward/backward pump powers and wavelengths, input/output signal powers, reflectivity profile of the FBGs and other parameters.

University Program

VPIphotonics supports 140+ universities and non-profit research centers around the world to simulate photonic applications, perform classroom demonstrations, and investigate new designs. The VPIphotonics University Program offers academic software licensing and training discounts, flexible licensing options and course material development.

With the Photonics Curriculum our partners receive a free package of course material including lecture notes and laboratory exercises for academic programs. The curriculum is designed to teach the basics of Photonics using our modeling and analysis tools. The material consists of individual modules that are customizable and extendable.

Sophisticated simulation setups can be exported from VPIphotonics design tools, easily distributed as dynamicDataSheet™ (dds), and run in the free simulator VPIplayer. This empowers engineers and teachers to present their ideas to colleagues and students. VPIplayer comes with a powerful simulation engine and generates results on flexible data analyzers. Interactive settings allow adjusting parameter values via predefined sliders.