Photonic theory design and simulations - 4Virtual room: INO - 2
|Wednesday, May 27|
TD-4-27-1 / Optimizing a Lossy Microring Resonator System for Quadrature Squeezing
* Colin Vendromin, Queen's University, Canada
Marc Dignam, Queen's University
In this work we theoretically investigate the generation and time evolution of a squeezed thermal state inside a lossy side-coupled ring resonator. We derive the optimum input pump pulse duration and optimum coupling strength to find the maximally quadrature squeezed thermal state.
TD-4-27-2 / Novel designs of optoacoustic waveguides
* Mikolaj Schmidt, Macquarie University, Australia
Christopher Poulton, University of Technology Sydney
Matthew O'Brien, Macquarie University
Goran Mashanovich, University of Southampton
Graham Reed, University of Southampton
Benjamin Eggleton, The University of Sydney
Michael Steel, Macquarie University
We present two new designs of optoacoustic waveguides supporting nonlinear Brillouin scattering (SBS). The first design, optimized for forward SBS, comprises a rectangular core supporting a low-loss optical mode, suspended in air by a series of transverse ribs. The ribs are engineered to exhibit a complete acoustic stopband and suppress the transverse leakage of acoustic waves. The second design is a realization of Anti Resonant Reflecting Acoustic Waveguide – an analogue of optical ARROW. These waveguides, capable of co-localization and guiding of both the optical and GHz acoustic waves in simple, translationally invariant waveguides, are shown to support backwards SBS.
TD-4-27-3 / Chaotic Microresonator for Neuromorphic Reservoir Computer
* Sendy Phang, University of Nottingham, United Kingdom
Angela B Seddon, University of Nottingham
Christopher Mellor , University of Nottingham
Peter Bientsman, Ghent University
Trevor M. Benson, University of Nottingham
There is a need to develop an objective, accurate test that would allow screening and diagnosis of disease in a rapid, non-invasive and reliable way. In this contribution, we present our recent work in developing an all-optical signal processing device called a photonic reservoir computer (PhRC) which can be tuned to perform a discrimination task in view of diagnostic application. The PhRC is inspired by how the brain handles and process information. We demonstrate that a chaotic micro-resonator is a suitable platform for the optical implementation of such an artificial neural network.
TD-4-27-4 / Spontaneous and Stimulated Emission and the Laser Linewidth
* Markus Pollnau, University of Surrey, United Kingdom
We excavate the physical principle underlying the laser linewidth. The gain elongates the photon-decay time of a resonator, resulting in the fundamental laser linewidth. It describes four- and three-level, transient and continuous-wave (cw) lasers above, at, and below the laser threshold. In a cw laser, the gain is smaller than the losses, thereby causing photons inside this mode to decay out of the resonator, hence explaining the finite linewidth in a cw laser. The Schawlow-Townes equation is a four-fold approximation of the fundamental laser linewidth.
TD-4-27-5 / Numerical Modeling of CW Raman Amplification in Integrated TeO2 Waveguides
* Hamidu M. Mbonde, McMaster University, Canada
Jonathan D. B. Bradley, McMaster University
We report on numerical investigation of Raman amplification in integrated tellurite (TeO2) waveguides. Our numerical results show possibility of an integrated Raman amplifier with expected gain above 2 dB at low propagation loss of 0.01 dB/cm and 1 W pump power in a 20-cm-long TeO2-coated Si3N4 waveguide.
TD-4-27-6 / Simulation of Mach-Zehnder modulator with ultra-responsive phase shifters
* Mikhail Makarov, JSC Molecular Electronics Research Institute, Russian Federation
Mikhail Barabanenkov, Institute of Microelectronics Technology of Russian Academy of Sciences
Alexander Italyantsev, JSC Molecular Electronics Research Institute
This work is devoted to the simulation of the silicon Mach-Zehnder modulator operation with a phase shifter based on u-shaped p-n junction. The extinction ratio of 14.5 dB and the operation frequency of 20 GHz were achieved.